The first time I left Dubai's glittering skyline for the open desert, I remember how quickly the city's clean lines surrendered to the soft geometry of dunes. Glass and steel fell away in the rearview mirror. Ahead, the horizon was a watercolor of ochre and gold, bleached sky and wind-sculpted sand. People come for many reasons, but if you ask me, the phrase desert scenery dune buggy Dubai sums up a particular promise: modern energy meeting ancient silence.
The dunes east of the city look alive. The wind makes them breathe, reshaping their ridges hour by hour. From the highway they seem smooth, but up close the sand is intricate-delicate ripples layered like fingerprints, the slope of each dune telling a story about where the wind blew last night, how hard, and from which direction. The Lahbab region is famous for its red sand, iron-rich grains that catch the sun and glow like embers at dusk. Farther out, the colors fade toward pale gold, interrupted by hardy shrubs and the scattered green of ghaf trees that have learned patience the way the desert teaches it: slowly, thoroughly.
A dune buggy looks simple, a stripped-down frame with big tires and seats that feel more like harnesses than chairs. The simplicity is deceptive. Everything is there for a reason-roll cage, wide stance, sand tires with low pressure for flotation, the engine tuned to deliver torque rather than speed. The guide's briefing is as clear as the sky overhead: keep distance, read the dune faces, never crest blind, trust the throttle. Out here, speed is less important than rhythm. The sand rewards smooth hands and punishes jerky impulses. It's not about winning. It's about listening.
When the buggy first noses off the firm sand into the soft stuff, you feel it in your chest.
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The engine note shifts to a deeper hum, the tires settle, the steering goes light. desert exploration Dubai buggy . You learn how to slide without fighting it, how to “draw” a curve with the throttle. Cresting a dune is part geometry, part nerve. You approach on the windward side, where the sand is packed and forgiving, then tip the nose over with a breath of power and drop down the leeward face where it's looser and steeper. The horizon tilts, your stomach floats, the buggy lands, and suddenly you're carving a new line like a skier in dry, warm snow.
Between bursts of motion, the desert keeps offering details. Tracks cross the sand like writing-tiny commas from lizards, feathered lines from birds, a looping story from a fox. In winter you might spot an oryx at a distance, pale and patient against the light. When the engine cuts, the quiet is startling. It isn't empty. It's full of small sounds: a wind-tuned hiss, the sigh of grain against grain, your own breathing. If the city is a constant conversation, the desert is a great listener.
Dubai's desert traditions are never far from this modern play. You'll see a falconer now and then, the bird hooded and calm, a reminder that the landscape was navigated long before a throttle existed. A Bedouin camp might offer cardamom coffee and sweet dates under a low canopy, the kettle singing over coals. These aren't mere props; they are parts of a living culture, adapted and resilient. Tourism packages can be loud, but the best operators hold space for stillness, for the taste of smoke in tea, for a story about a grandfather who knew the stars by heart.
Safety in the desert is earned, not assumed. The machine gives confidence, but the sand tests judgment. A good guide is generous with tips: angle across the slope to avoid digging in, keep a gentle throttle to float, never stop on a crest, radio if you're stuck. Getting stuck isn't failure; it's part of the language. Recovery boards come out, tires drop a few more PSI, the buggy shivers loose, and you're back in the flow. There's humility built into this dance. The desert doesn't care who you are. It asks only that you pay attention.
Paying attention also means noticing our footprint. The desert is tough in the grand sense and fragile in the details. One careless skid can scar a slope that took months to form. A single ghaf sapling holds a thousand tomorrow-shadows if we let it. Choose routes that avoid vegetation, pack out every scrap, and support operators who respect wildlife and the protected reserves. There's a quiet pride in leaving the place looking untouched, a courtesy to the next dawn and the next set of tire tracks.
As afternoon unspools, the light softens and the dunes change again. Edges sharpen, then blur, then bleed into one another like waves. Sunset in the Dubai desert is generous with color; the red dunes deepen, shadows pool in the hollows, and the sky lays a thin silver over everything just before darkness arrives. If you linger, the stars step forward, unhurried. The city's glare is still a faint glow on the horizon, but above you the Milky Way can stretch like a silent river on clear winter nights. The engine's purr fades to memory, and what remains is a sense of scale: how small the vehicle is, how wide the land, how old the wind.
People sometimes ask if the dune buggy is the point or the desert is. In Dubai, the answer is both. The dune buggy is a way in, a key that turns in a modern lock. It lets you feel the terrain in your hands and ribcage, to trace the desert's contours with your own sensations. But the desert is the room you've opened: a place that holds history and climate and time in its quiet. You come back to the city with fine sand in your shoes and a surprising peace in your head, a contrast sharper than any skyline.
So when I think of desert scenery dune buggy Dubai, I don't picture a brochure image.
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I hear an engine thrum beside the sigh of wind. I see a falcon's eye reflect a sunset. I remember the way the dunes seemed to move even when they were still, how our small caravan stitched a temporary thread across a vast fabric and then unspooled, leaving almost nothing behind. The thrill stays, but so does the respect. 2 hour dune buggy Dubai Out there, beneath the big sky, you learn that adventure and reverence can share the same track.
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About Off-roading
Activity of driving on unsurfaced roads or tracks
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A Land Rover Defender 90 off-roadingA Unimog U1600 off-roading4WDs at Fraser Island beach, Australia
Off-roading is the act of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, or other natural terrain. Off-roading ranges from casual drives with regular vehicles to competitive events with customized vehicles and skilled drivers.[1]
Off-road vehicle
[edit]
Main article: Off-road vehicle
Off-roading in Dubai, UAE.
Off-road vehicles are either capable of or specifically developed for off-road driving. These vehicles often have features designed specifically for use in off-road conditions such as suspension lifts, off-road tires, skid plates, snorkels, roll cages, or strengthened drivetrains.[2][3]
Tools
[edit]
Recovery board
High lift jack
Snatch strap
Types of recreational off-roading
[edit]
Dune bashing
[edit]
A 5th-generation Ford Bronco dune bashing
Dune bashing is a specific form of off-roading performed on sand dunes.[4]
Dune Buggies, Sport-utility vehicles, and ATVs are often used.[5] Vehicles driven on sand dunes are often equipped with a roll cage for safety in the case of an overturn. The tire pressure is often reduced to gain more traction by increasing the footprint of the tire and lowering the ground pressure of the vehicle on the sand, comparable to a person wearing snowshoes to walk on snow without sinking.[6] Some cars are equipped with beadlock wheels, which allow tire pressure to be lowered even further without risking separation of the tire and rim.
Upon entering the desert, it is customary for drivers to meet with a pack of other vehicles and a group leader before proceeding. The group leader then leads the pack through the stunts in a single file line. The rationale for this technique is to prevent drivers from becoming disoriented and getting lost.[6]
Off-road racing
[edit]
Main article: Off-road racing
Desert racing
[edit]
High-speed racing in the desert includes chases and racing at maximum speed through rough desert terrain with numerous pots and bumps. Drivers often use rear-wheel drive and 4-wheel drive trucks with long-travel suspension and wide stance between the front enlarged tires, which maintains optimal stability at high speed. These types of trucks are often called Trophy trucks or PreRunners.[7]
Rock racing
[edit]
Rock racing involves driving over rocks, but unlike rock crawling, does not specify penalties for striking cones, backing up, or winching.[8] In addition, rock racing incorporates a level of high-speed racing that is not characteristic of rock crawling.
Rallying
[edit]
See article: Rally
This section is an excerpt from Rallying.[edit]
Petter Solberg driving a Subaru Impreza WRC on gravel at the 2006 Cyprus Rally, a World Rally Championship event
Rallying is a wide-ranging form of motorsport with various competitive motoring elements such as speed tests (sometimes called "rally racing" in United States), navigation tests, or the ability to reach waypoints or a destination at a prescribed time or average speed. Rallies may be short in the form of trials at a single venue, or several thousand miles long in an extreme endurance rally.
Depending on the format, rallies may be organised on private or public roads, open or closed to traffic, or off-road in the form of cross country or rally-raid. Competitors can use production vehicles which must be road-legal if being used on open roads or specially built competition vehicles suited to crossing specific terrain.
In most cases rallying distinguishes itself from other forms of motorsport by not running directly against other competitors over laps of a circuit, but instead in a point-to-point format in which participants leave at regular intervals from one or more start points.
Mudding and mud plugging
[edit]
See also: Mud bogging
Land Rover Series III mud plugging
Mudding is off-roading through an area of wet mud or clay, leading to extremely low traction and problems with moving forward.[9] The goal is to drive as far as possible without getting stuck.[10] There are many types of tires that are often used for this activity, including balloon tires, mud-terrain tires and paddle tires. The activity is popular in the United States, although it is illegal on public land due to the environmental impact.[11]
Mud plugging, as practiced in the United Kingdom, refers to the motorsport of classic trials, where the main objective is to complete a challenging course of (mostly unpaved) roads and (often muddy, and frequently uphill) off-road terrain.[12]
This form of motorsport is one of the oldest to survive to this day, dating back at least to the 1920s.[13]
Jeep Rubicon rock crawling
Rock crawling
[edit]
Rock crawling involves driving over rocky terrain, with the goal of getting as far as possible with the fewest penalties. Penalties are received for striking cones, using a winch to get unstuck, going out of bounds, and going in reverse. These rules lead to the sport being technical, with drivers having to plan ahead to reduce the penalties they receive. Vehicles used for rock crawling are usually modified with different tires, suspension components that allow greater axle articulation, and changes in the differential[14] gear ratio to obtain characteristics suitable for low-speed operation for traversing obstacles. Commonly, rock crawlers have a "spotter", who is an assistant on foot by the vehicle to provide information about areas out of the driver's field of view.[15]
Competitive trials
[edit]
All progress is made at low speed and the emphasis is on skill rather than on finishing first, although trialing can be highly competitive. There are three traditional forms of off-road trialing. During some competitive events, such as the Turkey Run in Idaho and other events around the United States, point systems may be used to determine rewards.
RTV trialing
[edit]
RTV (Road Taxed Vehicle) trialing is the most common form of trialing. As the name suggests, it is for vehicles that are road-legal (and thus required to pay road tax). This excludes vehicles that are highly modified or specially built. RTV-class vehicles can carry a wide range of suspension modifications, as well as off-road tires (provided they are road-legal), recovery winches, raised air intakes, etc. Vehicles on RTV trials are usually best described as "modified from standard"—they use the standard chassis, drive-train, and body that the vehicle was built with, but are fitted with a wide array of modifications to assist in the trailing. Whilst modification is not necessarily required for an RTV trial, at the very least the vehicle would be expected to have some underbody and over-the-body protection such as skid plates or roll cages, often made from durable stainless steel, aluminium or mild steel. RTV courses are intended to be non-damaging and driven at little more than a walking pace and a course properly laid out would be drivable without damage. However, the terrain usually includes steep slopes, water, side slopes, deep ruts, and other obstacles that could potentially damage a vehicle if mistakes are made or poor driving techniques are used. As such, the use of modifications can increase the chances of success.[16]
RTV trials usually take place on farmland, a quarry site, or at a dedicated off-road driving center and are usually organized by a dedicated trialing body (such as the All-Wheel Drive Club or the Association of Land Rover clubs in the UK, or by a vehicle owner's club. The course consists of 10 to 12 "gates" marked by two garden canes (sticks) and are vertically placed. The gates are just wide enough to get a standard vehicle through. Vehicles start in a stagger, proceeding one by one, and are deemed to have cleared a gate if at least one of the front wheel hubs passes between the canes. The vehicle's attempt ends when it comes to a stop (depending on the exact level of skill the trial is aimed at any stopping may end the attempt, or a few seconds may be allowed). Long-wheelbase vehicles are usually allowed to perform a three-point turn if needed, providing the driver declares where the turn is going to be made before they attempt the course (this puts a strong emphasis on ground-reading ability). This can also be called a "shunt", where the driver has to attempt a gate and then shout "shunt". They are then allowed a space of one and a half car lengths to reverse and line the car better to enter through the gate[17]
The course between the gates is a "section": between the start line and the first gate is "Section 1", the part between the first and second gates is "Section 2" and so on. An RTV course is often laid out so that each section is progressively more difficult, although this is not always the case. If a driver fails to complete Section 1 they are given 10 points. If the attempt ends in Section 2, 9 points are awarded, etc. A clear round results in gaining only 1 point. A day's event will consist of many different courses and the driver with the lowest score is the winner.
Since the terrain covered in RTV trials should be well within the capabilities of any reasonably capable vehicle (even in standard form), these trials emphasize driver skill and ground-reading abilities. Skill and experience have a larger bearing on success than having a well-equipped and modified car.
CCV trialing
[edit]
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Non-legal Cross-Country Vehicle
Cross Country Vehicle (CCV) trialing is the next step up from RTV trialing and is open to non-road-legal vehicles, which greatly increases the scope for modification. The terrain covered will be of greater difficulty than that found on an RTV trial. Since there is a risk of touching rocks and trees with the bodywork,[18] CCV trialing will usually require more careful use of speed to get the vehicle across certain obstacles will attempting to mitigate the risk of vehicle damage. Whilst no trial is intended to be vehicle-damaging, mistakes and accidents are inevitable. A standard-specification vehicle would not be expected to be able to complete a CCV course, but it would still be possible.
The event is run along the same lines as RTV, with a course made up of cane-marked gates.
Suzuki SJ based trial car, showing an external roll-cage
CCV trialing differs greatly from RTV trials in the vehicles used. Since CCV judges adopt an "anything goes" attitude, CCV trials rely on having the correct vehicle to a much greater extent than in an RTV trial. Competitors can design and build vehicles that are much more optimized for off-road use, than in the lower ranks of trialing. CCV vehicles have powerful engines, high ground clearance, light, minimalist bodywork, and good approach and departure angles. For many years, in the UK, the ultimate CCV vehicle could be built by taking the chassis of a Range Rover, removing the body, cutting the chassis down to an 80-inch wheelbase, and attaching it to the body of a Series I Land Rover, retaining the Range Rover's V8 engine and coil-spring suspension in a light, maneuverable body. In recent years, the value of early Land Rovers and Range Rovers has risen to the extent that this is no longer practical. CCV trailers now usually base their vehicles around Land Rover Defenders or a standard 100-inch chassis from a Range Rover or Series I Discovery. The Suzuki SJ series of vehicles also make good bases for CCV-spec vehicles. Some vehicles are specially built, taking the form of light "buggies" with tractor tires and "fiddle" brakes (fiddle brakes give the ability to lock a wheel, which enables much better turning, better control descending hills, traction control by slowing or locking the spinning wheel) for the best performance.
Vehicles are required to meet certain safety regulations. Roll-cages must be fitted and be built to a suitable standard, recovery points must be fitted front and rear and fuel tanks must meet certain standards. A 4-point harness for all occupants is required and a fire extinguisher is recommended.
Off-roading events
[edit]
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Driving a Triumph Bonneville during an offroad event
In some countries off-road activities are strictly regulated, while others promote cross-country off-road endurance events like the Dakar Rally, Spanish Baja, Africa Eco Race, Abu Dhabi Desert Challenge, Russian Baja Northern Forest, King of the Hammers, San Felipe 250 and Baja 500 & 1000, which are a test of navigation skills and machine durability. Off-road parks and motocross tracks also host several events and may be the only legal place to off-road in the area.
Criticism of ORV use
[edit]
Environmental impact
[edit]
Off-road vehicle impact in SW Utah
Off-road vehicle use on public land has been criticized by some members of the U.S. government[19] and environmental organizations including the Sierra Club and The Wilderness Society.[20][21] They have noted several consequences of illegal ORV use such as pollution,[22] trail damage, erosion, land degradation, possible species extinction,[23] and habitat destruction[24][25] which can leave hiking trails impassable.[26] ORV proponents argue that legal use taking place under planned access along with the multiple environment and trail conservation efforts by ORV groups will mitigate these issues.[27] Groups such as the BlueRibbon Coalition advocate for the responsible use of public lands for off-road activities.[28]
Noise pollution is also a concern[29] and several studies conducted by Montana State University, California State University, University of Florida and others have cited possible negative behavioral changes in wildlife as the result of some ORV use.[30]
Some U.S. states have laws to reduce noise generated by off-road and non-highway vehicles. Washington is one example: "State law requires off-road and other non-highway vehicles to use specified noise-muffling devices (RCW 46.09.120(1) (e) maximum limits and test procedures). State agencies and local governments may adopt regulations governing the operation of non-highway vehicles on property, streets, or highways within their jurisdiction, provided they are not less stringent than state law (RCW 46.09.180 regulation by local political subdivisions)".[31]
Mojave desert controversy
[edit]
The U.S. Bureau of Land Management (BLM) supervises several large off-road vehicle areas in California's Mojave Desert.
In 2009, U.S. District Judge Susan Illston ruled against the BLM's proposed designation of additional off-road use on designated open routes on public land. According to the ruling, the BLM violated its regulations[32] when it designated approximately 5,000 miles (8,000 km) of off-road vehicle routes in 2006.[33] According to Judge Illston the BLM's designation was "flawed because it does not contain a reasonable range of alternatives" to limit damage to sensitive habitat, as required under the National Environmental Policy Act.[34] Illston found that the Bureau had inadequately analyzed the route's impact on air quality, soils, plant communities and sensitive species, such as the endangered Mojave fringe-toed lizard, pointing out that the United States Congress has declared that the California Desert and its resources are "extremely fragile, easily scarred, and slowly healed".[34]
The court also found that the BLM failed to follow route restrictions established in the agency's conservation plan, resulting in the establishment of hundreds of illegal OHV routes during the previous three decades.[32] The plan violated the BLM's regulations, specifically the Federal Land Policy and Management Act of 1976 (FLPMA) and the National Environmental Policy Act of 1969 (NEPA).[33] The ruling was considered a success for a coalition of conservation groups including the Friends of Juniper Flats, Community Off-road Vehicle Watch, California Native Plant Society, The Center for Biological Diversity, The Sierra Club, and The Wilderness Society who initiated the legal challenge in late 2006.[34]
Roadless area conservation
[edit]
Many U.S. national parks have discussed or enacted roadless rules and partial or total bans on ORVs. To accommodate enthusiasts, some parks like Big Cypress National Preserve in Florida, were created specifically for ORVs and related purposes. However, such designations have not prevented damage or abuse of the policy.[35]
Public statements
[edit]
In 2004, several environmental organizations sent a letter to Dale Bosworth, Chief of the United States Forest Service, and described the extent of damage caused by ORV use, including health threats to other people:
It is well-established that the proliferation of off-road vehicles and snowmobile use places soil, vegetation, air and water quality, and wildlife at risk through pollution, erosion, sedimentation of streams, habitat fragmentation and disturbance, and other adverse impacts to resources. These impacts cause severe and lasting damage to the natural environment on which human-powered and equestrian recreation depends and alter the remote and wild character of the backcountry. Motorized recreation monopolizes forest areas by denying other users the quiet, pristine, backcountry experience they seek. It also presents safety and health threats to other re-creationists.[36]
In 2004 the Supreme Court Justice Antonin Scalia listed several problems that result from ORV use in natural areas. From the Environmental News Service article:
Scalia noted that off-road vehicle use on federal land has "negative environmental consequences including soil disruption and compaction, harassment of animals, and annoyance of wilderness lovers.[37]
Several environmental organizations, including the Rangers for Responsible Recreation, are campaigning to draw attention to a growing threat posed by off-road vehicle misuse and to assist overmatched land managers in addressing ORV use impacts.[38] These campaigns in part have prompted congressional hearings about the growing impact of unmanaged off-road vehicle use.
The House Natural Resources Committee Subcommittee on National Parks, Forests and Public Lands held an oversight hearing on "The Impacts of Unmanaged Off-Road Vehicles on Federal Land" on March 13, 2008.[39] A second hearing on off-highway vehicle (OHV) management on public lands was held by the Senate Energy and Natural Resources Committee on June 5, 2008.[40] The Senate committee hearing was convened to find out why the agencies are failing to grapple with the negative impacts of off-road vehicle use on US public lands and what the agencies might need to start doing differently. For the first time in perhaps a decade, members of the Senate Energy and Natural Resources Committee grilled leaders of the Forest Service and the BLM about why off-road vehicle use is being allowed to damage America's national treasures.
Taking center stage in the discussion was the "travel planning process", a complex analysis and decision-making procedure to designate appropriate roads and trails. Both the Forest Service and BLM have been engaged in somewhat similar travel planning processes now for years, but some of the committee members didn't seem to think those processes were going along so well. "The BLM has identified travel management on its lands as ‘one of the greatest management challenges’ it faces," stated committee Chairman Jeff Bingaman, D-NM. "Likewise, the Forest Service has identified unmanaged recreation — including ORV use — as one of the top four threats to the management and health of the National Forest System. Despite these statements, it seems to me that neither agency has been able to successfully manage off-road use."
"Existing rules for managing off-road vehicles are not being enforced," Bingaman added, and the agencies are ignoring unregulated use "with significant consequences for the health of our public lands and communities, and adverse effects on other authorized public land uses."
Off-Road Vehicle Damage
Negative environmental effects caused by a motorcycle to a portion of the Los Padres National Forest
Damage that occurred when vehicles left the posted trail in Anza-Borrego Desert State Park
In gaming
[edit]
Main page: Category:Off-road racing video games
Video games that allow users to off-road include Forza Horizon, Dirt Series, MudRunner, Grand Theft Auto V, Dakar Desert Rally, and the MotorStorm series.
See also
[edit]
All-terrain vehicle
Amphibious vehicle
Approach and departure angles
Baja Bug
Breakover angle
Dirt Bike
Dual-sport motorcycle
Game viewer vehicle
Mountain bike
Mud bogging
Overlanding
Ramp travel index
Ride height
Side-by-side
Trophy truck
Further reading
[edit]
Environmental Hazards of Dune Bashing
References
[edit]
Notes
[edit]
^International Organization of Professional Drivers(PDF).
^The Jeep Guru. "Why Are Jeep Rubicons So Expensive?". Rig Rebel. Archived from the original on 2023-10-01. Retrieved 2021-10-20.
^"15 of the Best Off-Road Vehicles You Can Buy". MotorTrend. 2021-06-09. Retrieved 2021-10-20.
^Thompson, Macaulay (2022-04-04). "All You Need to Know about Dune Bashing in Dubai - Travel Dudes". Retrieved 2023-09-24.
^"Sand Duning and Off-roading in the Desert - Surf The Sand". sand-boarding.com. 5 September 2020. Retrieved 2022-06-08.
^"Prerunner Building 101". Off Road Xtreme. 2018-06-20. Retrieved 2019-09-23.
^"When Rock Crawling Turned Rock Racing". DrivingLine. 2015-04-30. Retrieved 2023-09-24.
^United States Forestry Service. "Willamette National Forest". Retrieved 19 May 2013.
^"Muddy Run Raceway Rules". muddyrunraceway.com. Archived from the original on 11 January 2017. Retrieved 1 September 2016.
^US Gov't. "USFS". Retrieved 19 May 2013.
^Nulty, Leo (2015-02-04). "Sporting Trials (Mudplugging)". Motorsport.ie. Retrieved 2025-04-10.
^"History of Trials". Stroud and District Motor Club. 2018-03-08. Retrieved 2025-04-10.
^Deysel, A. J. (2019-11-11). "Differential Gear Ratio to Tire Size Guide | Modifind.com - Off Road". Retrieved 2020-02-17.
^"Off-Road Spotting Basics: "Left. No, no your other left!"". RoverGuide. 2011-12-29. Archived from the original on 2016-04-02. Retrieved 2018-01-19.
^"Come Ride With Me! Daily Life with a Lifted Jeep Wrangler JK (Video) - The Fast Lane Truck". tfltruck.com. 11 January 2018. Retrieved 2018-01-19.
^Gambino, Joe (2020-12-13). "Off-Roading 101 - Driving Tips and Equipment". Rogue Fabrication. Retrieved 2022-02-19.
^"CCV - Cross Country Vehicle". nero.org.uk. Retrieved 2023-11-11.
^"USDA Forest Service - Caring for the land and serving people" (PDF). fs.fed.us. Archived from the original on November 19, 2004.
^"Sierra Club Conservation Policies". Archived from the original on December 1, 2006.
^"Off-Road Vehicles and Public Lands: A National Problem". Archived from the original on December 14, 2006.
^Wolfe, Christopher; Buck, Brenda; Miller, Aubrey; Lockey, James; Weis, Christopher; Weissman, David; Jonesi, Alexander; Ryan, Patrick (November 2017). "Exposure to naturally occurring mineral fibers due to off-road vehicle use: A review". International Journal of Hygiene and Environmental Health. 220 (8): 1230–1241. Bibcode:2017IJHEH.220.1230W. doi:10.1016/j.ijheh.2017.07.003. PMID 28778427.
^Rice, Kathleen C. "National Collection of Imperiled Plants - Pholisma sonorae". Center for Plant Conservation. Archived from the original on 4 November 2012. Retrieved 8 June 2012.
^"Mojave lizard may get protection; off-road vehicles are cited as threat". Los Angeles Times. 12 January 2008. Archived from the original on December 4, 2008.
^"Officials seek to protect desert reptile". Las Vegas Review-Journal. January 11, 2008. Archived from the original on December 5, 2008.
^"Recent questions and answers". CarrierAdda QnA. Archived from the original on July 11, 2015.
^Rogers, Jedediah S. (2013). Roads in the Wilderness: Conflict in Canyon Country. University of Utah Press. doi:10.1353/book41428. ISBN 978-1-60781-312-5.
^"Addressing the Ecological Effects of Off-Road Vehicles | the Wilderness Society". Archived from the original on 2008-11-28. Retrieved 2009-01-19.
^"The Impacts of Off-Road Vehicle Noise on Wildlife". Archived from the original on 2010-12-25.
^"Frequently Asked Questions about Noise Pollution -- for Local Government" (PDF). Archived from the original (PDF) on 2012-02-07. Retrieved 2006-10-27.
^ ab"Off-road Routes in Mojave Desert Found Illegal". wilderness.org. Archived from the original on 2012-04-15. Retrieved 2009-10-09.
^ ab"Judge rejects federal plan for SoCal desert routes". mercurynews.com.
^ abcSahagun, Louis (September 30, 2009). "Judge rejects U.S. management plan for California desert". Los Angeles Times.
^"Caribbean-Florida Water Science Center (CFWSC)". Archived from the original on 2006-09-22. Retrieved 2006-10-18.
^"Public Employees for Environmental Responsibility: Off-Road Wreckreation - Home". Archived from the original on 2008-05-09. Retrieved 2010-01-09.
^"Committee on Natural Resources". Archived from the original on 2008-03-26.
^"U.S. Senate Committee on Energy and Natural Resources". www.energy.senate.gov.
Bibliography
[edit]
Allen, Jim; Weber, James J. (2021). The Four-Wheeler's Bible: The Complete Guide to Off-Road and Overland Adventure Driving (3rd ed.). Beverly, MA, USA: Motorbooks. ISBN 9780760368053.
External links
[edit]
Wikivoyage has a travel guide for Offroad driving.
Media related to Off-roading at Wikimedia Commons
Man-made erosion, The National Trust (UK)
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About Polaris
Northern pole-star; brightest star in Ursa Minor
This article is about the Earth's current north star. For such stars in general, see pole star. For other uses, see Polaris (disambiguation) and North Star (disambiguation).
"Stella Polaris" redirects here. For the military operation, see Operation Stella Polaris.
α UMi A: 1 Ursae Minoris, BD+88°8, FK5 907, GC 2243, HD 8890, HIP 11767, HR 424, SAO 308
α UMi B: NSV 631, BD+88°7, GC 2226, SAO 305
Database references
SIMBAD
α UMi A
α UMi B
Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinized to Alpha Ursae Minoris) and is commonly called the North Star. With an apparent magnitude that fluctuates around 1.98,[3] it is the brightest star in the constellation and is readily visible to the naked eye at night.[16] The position of the star lies less than 1° away from the north celestial pole, making it the current northern pole star. The stable position of the star in the Northern Sky makes it useful for navigation.[17]
Although appearing to the naked eye as a single point of light, Polaris is a triple star system, composed of the primary, a yellow supergiant designated Polaris Aa, in orbit with a smaller companion, Polaris Ab; the pair is almost certainly[14] in a wider orbit with Polaris B. The outer companion B was discovered in August 1779 by William Herschel, with the inner Aa/Ab pair only confirmed in the early 20th century.
As the closest Cepheid variable, Polaris Aa's distance is a foundational part of the cosmic distance ladder. The revised Hipparcos stellar parallax gives a distance to Polaris A of about 432 light-years (ly) (133 parsecs (pc)), while the successor mission Gaia gives a distance of 446.5 ly (136.9 pc) for Polaris B[9][a].
Stellar system
[edit]
Polaris components as seen by the Hubble Space Telescope
Polaris Aa is an evolved yellow supergiant of spectral type F7Ib with 5.4 solar masses (M☉). It is the first classical Cepheid to have a mass determined from its orbit. The two smaller companions are Polaris B, a 1.39 M☉ F3 main-sequence star orbiting at a distance of 2,400 astronomical units (AU),[18] and Polaris Ab (or P), a very close F6 main-sequence star with a mass of 1.26 M☉.[3] In January 2006, NASA released images, from the Hubble telescope, that showed the three members of the Polaris ternary system.[19][20]
Polaris B can be resolved with a modest telescope. William Herschel discovered the star in August 1779 using a reflecting telescope of his own, one of the best telescopes of the time.[21]
The variable radial velocity of Polaris A was reported by W. W. Campbell in 1899, which suggested this star is a binary system.[22] Since Polaris A is a known cepheid variable, J. H. Moore in 1927 demonstrated that the changes in velocity along the line of sight were due to a combination of the four-day pulsation period combined with a much longer orbital period and a large eccentricity of around 0.6.[23] Moore published preliminary orbital elements of the system in 1929, giving an orbital period of about 29.7 years with an eccentricity of 0.63. This period was confirmed by proper motion studies performed by B. P. Gerasimovič in 1939.[24]
As part of her doctoral thesis, in 1955 E. Roemer used radial velocity data to derive an orbital period of 30.46 y for the Polaris A system, with an eccentricity of 0.64.[25] K. W. Kamper in 1996 produced refined elements with a period of 29.59±0.02 years and an eccentricity of 0.608±0.005.[26] In 2019, a study by R. I. Anderson gave a period of 29.32±0.11 years with an eccentricity of 0.620±0.008.[10]
There were once thought to be two more widely separated components—Polaris C and Polaris D—but these have been shown not to be physically associated with the Polaris system.[18][27]
Observation
[edit]
Variability
[edit]
A light curve for Polaris, plotted from TESS data[28]
Polaris Aa, the supergiant primary component, is a low-amplitude population I classical Cepheid variable, although it was once thought to be a type II Cepheid due to its high galactic latitude. Cepheids constitute an important standard candle for determining distance, so Polaris, as the closest such star,[10] is heavily studied. The variability of Polaris had been suspected since 1852; this variation was confirmed by Ejnar Hertzsprung in 1911.[29]
The range of brightness of Polaris is given as 1.86–2.13,[4] but the amplitude has changed since discovery. Prior to 1963, the amplitude was over 0.1 magnitude and was very gradually decreasing. After 1966, it very rapidly decreased until it was less than 0.05 magnitude; since then, it has erratically varied near that range. It has been reported that the amplitude is now increasing again, a reversal not seen in any other Cepheid.[6]
The period, roughly 4 days, has also changed over time. It has steadily increased by around 4.5 seconds per year except for a hiatus in 1963–1965. This was originally thought to be due to secular redward evolution across the Cepheid instability strip, but it may be due to interference between the primary and the first-overtone pulsation modes.[20][30][31] Authors disagree on whether Polaris is a fundamental or first-overtone pulsator and on whether it is crossing the instability strip for the first time or not.[11][31][32]
The temperature of Polaris varies by only a small amount during its pulsations, but the amplitude of this variation is variable and unpredictable. The erratic changes of temperature and the amplitude of temperature changes during each cycle, from less than 50 K to at least 170 K, may be related to the orbit with Polaris Ab.[12]
A 4-day time lapse of Polaris illustrating its Cepheid type variability.
Research reported in Science suggests that Polaris is 2.5 times brighter today than when Ptolemy observed it, changing from third to second magnitude.[33] Astronomer Edward Guinan considers this to be a remarkable change and is on record as saying that "if they are real, these changes are 100 times larger than [those] predicted by current theories of stellar evolution".
Torres 2023 published a broad historical compilation of radial velocity and photometric data. He concludes that the change in the Cepheid period has reversed and is now decreasing since roughly 2010. Torres notes that TESS data is of limited utility: as a survey telescope, TESS is optimized for dimmer stars than Polaris, so Polaris significantly over-saturates TESS's cameras. Determining an accurate total brightness for Polaris from TESS is extremely difficult, although it remains suitable for timing the period.[34]
Furthermore, apparent irregularities in Polaris Aa's behavior may coincide with the periastron passage of Ab, although imprecision in the data prevents a definitive conclusion.[34] At the Gaia distance, the Aa-Ab closest approach is 6.2 AU; the radius of the primary supergiant is 46 R☉, meaning that the periastron separation is about 29 times its radius. This implies tidal forcing upon Aa's upper atmosphere by Ab. Such binary tidal forcing is known from heartbeat stars, where eccentric periastron approaches cause rich multimode pulsation akin to an electrocardiogram.
Szabados 1992 suggests that, among Cepheids, "phase slips" similar to what happened to Polaris in the mid 1960s are associated with binary systems.[35]
In 2024, researchers led by Nancy Evans at the Harvard & Smithsonian published a study with fresh data on the inner binary using the interferometric CHARA Array. They improved the solution of the orbit: combining CHARA data with previous Hubble data, and in tandem with the Gaia distance of 446±1 light-years, they confirmed the Cepheid radius estimate of 46 R☉ and re-determined its mass at 5.13±0.28M☉. The corresponding Polaris Ab mass is 1.316±0.028M☉. Polaris remains overluminous compared to the best Cepheid evolution models, something also seen in V1334 Cygni. Polaris's rapid period change and pulsation amplitude variations are still peculiar compared to other Cepheids, but may be related to the first-overtone pulsations.[9]
Evans et al also tentatively succeeded in imaging features on the surface of Polaris Aa: large bright and dark patches appear in close-up images, changing over time. Follow up imaging campaigns are required to confirm this detection.[9] Polaris's age is difficult to model; current best estimates find the Cepheid to be much younger than the two main sequence components, seemingly enough to exclude a common origin, which would be quite unlikely for a triple star system.[14][15]
Torres 2023 and Evans et al 2024 both suggest that recent literature cautiously agree that Polaris is a first overtone pulsator.[34][9]
Role as pole star
[edit]
Main article: Pole star
Polaris azimuths vis clock face analogy.[36]A typical Northern Hemisphere star trail with Polaris in the center.Polaris lying halfway between the asterisms Cassiopeia and the Big Dipper.
Because Polaris lies nearly in a direct line with the Earth's rotational axis above the North Pole, it stands almost motionless in the sky, and all the stars of the northern sky appear to rotate around it. It thus provides a nearly fixed point from which to draw measurements for celestial navigation and for astrometry. The elevation of the star above the horizon gives the approximate latitude of the observer.[16]
In 2018 Polaris was 0.66° (39.6 arcminutes) away from the pole of rotation (1.4 times the Moon disc) and so revolves around the pole in a small circle 1.3° in diameter. It will be closest to the pole (about 0.45 degree, or 27 arcminutes) soon after the year 2100.[37] Because it is so close to the celestial north pole, its right ascension is changing rapidly due to the precession of Earth's axis, going from 2.5h in AD 2000 to 6h in AD 2100. Twice in each sidereal day Polaris's azimuth is true north; the rest of the time it is displaced eastward or westward, and the bearing must be corrected using tables or a rule of thumb. The best approximation[36] is made using the leading edge of the "Big Dipper" asterism in the constellation Ursa Major. The leading edge (defined by the stars Dubhe and Merak) is referenced to a clock face, and the true azimuth of Polaris worked out for different latitudes.
The apparent motion of Polaris towards and, in the future, away from the celestial pole, is due to the precession of the equinoxes.[38] The celestial pole will move away from α UMi after the 21st century, passing close by Gamma Cephei by about the 41st century, moving towards Deneb by about the 91st century.[citation needed]
The celestial pole was close to Thuban around 2750 BCE,[38] and during classical antiquity it was slightly closer to Kochab (β UMi) than to Polaris, although still about 10° from either star.[39] It was about the same angular distance from β UMi as to α UMi by the end of late antiquity. The Greek navigator Pytheas in ca. 320 BC described the celestial pole as devoid of stars. However, as one of the brighter stars close to the celestial pole, Polaris was used for navigation at least from late antiquity, and described as ἀεί φανής (aei phanēs) "always visible" by Stobaeus (5th century), also termed Λύχνος (Lychnos) akin to a burner or lamp and would reasonably be described as stella polaris from about the High Middle Ages and onwards, both in Greek and Latin. On his first trans-Atlantic voyage in 1492, Christopher Columbus had to correct for the "circle described by the pole star about the pole".[40] In Shakespeare's play Julius Caesar, written around 1599, Caesar describes himself as being "as constant as the northern star", although in Caesar's time there was no constant northern star. Despite its relative brightness, it is not, as is popularly believed, the brightest star in the sky.[41]
Polaris was referenced in the classic Nathaniel Bowditch maritime navigation book American Practical Navigator (1802), where it is listed as one of the navigational stars.[42]
Names
[edit]
This artist's concept shows: supergiant Polaris Aa, dwarf Polaris Ab, and the distant dwarf companion Polaris B.
The modern name Polaris[43] is shortened from the Neo-Latin stella polaris ("polar star"), coined in the Renaissance when the star had approached the celestial pole to within a few degrees.[44][45]
Gemma Frisius, writing in 1547, referred to it as stella illa quae polaris dicitur ("that star which is called 'polar'"), placing it 3° 8' from the celestial pole.[44][45]
In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[46] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included Polaris for the star α Ursae Minoris Aa.[47]
In antiquity, Polaris was not yet the closest naked-eye star to the celestial pole, and the entire constellation of Ursa Minor was used for navigation rather than any single star. Polaris moved close enough to the pole to be the closest naked-eye star, even though still at a distance of several degrees, in the early medieval period, and numerous names referring to this characteristic as polar star have been in use since the medieval period. In Old English, it was known as scip-steorra ("ship-star").[citation needed]
In the "Old English rune poem", the T-rune is apparently associated with "a circumpolar constellation", or the planet Mars.[48]
In the Hindu Puranas, it became personified under the name Dhruva ("immovable, fixed").[49]
In the later medieval period, it became associated with the Marian title of Stella Maris "Star of the Sea" (so in Bartholomaeus Anglicus, c. 1270s),[50] due to an earlier transcription error.[51]
An older English name, attested since the 14th century, is lodestar "guiding star", cognate with the Old Norse leiðarstjarna, Middle High German leitsterne.[52]
The ancient name of the constellation Ursa Minor, Cynosura (from the Greek κυνόσουρα "the dog's tail"),[53] became associated with the pole star in particular by the early modern period. An explicit identification of Mary as stella maris with the polar star (Stella Polaris), as well as the use of Cynosura as a name of the star, is evident in the title Cynosura seu Mariana Stella Polaris (i.e. "Cynosure, or the Marian Polar Star"), a collection of Marian poetry published by Nicolaus Lucensis (Niccolo Barsotti de Lucca) in 1655. [citation needed]
Ursa Minor as depicted in the 964 Persian work Book of Fixed Stars, Polaris named al-Judayy "الجدي" in the lower right.
Its name in traditional pre-Islamic Arab astronomy was al-Judayy الجدي ("the kid", in the sense of a juvenile goat ["le Chevreau"] in Description des Etoiles fixes),[54] and that name was used in medieval Islamic astronomy as well.[55][56] In those times, it was not yet as close to the north celestial pole as it is now, and used to rotate around the pole.[citation needed]
It was invoked as a symbol of steadfastness in poetry, as "steadfast star" by Spenser. Shakespeare's sonnet 116 is an example of the symbolism of the north star as a guiding principle: "[Love] is the star to every wandering bark / Whose worth's unknown, although his height be taken."[57]
In Julius Caesar, Shakespeare has Caesar explain his refusal to grant a pardon: "I am as constant as the northern star/Of whose true-fixed and resting quality/There is no fellow in the firmament./The skies are painted with unnumbered sparks,/They are all fire and every one doth shine,/But there's but one in all doth hold his place;/So in the world" (III, i, 65–71). Of course, Polaris will not "constantly" remain as the north star due to precession, but this is only noticeable over centuries.[citation needed]
In Inuit astronomy, Polaris is known as Nuutuittuq (syllabics: ᓅᑐᐃᑦᑐᖅ).[58]
In traditional Lakota star knowledge, Polaris is named "Wičháȟpi Owáŋžila". This translates to "The Star that Sits Still". This name comes from a Lakota story in which he married Tȟapȟúŋ Šá Wíŋ, "Red Cheeked Woman". However, she fell from the heavens, and in his grief Wičháȟpi Owáŋžila stared down from "waŋkátu" (the above land) forever.[59]
The Plains Cree call the star in Nehiyawewin: acâhkos êkâ kâ-âhcît "the star that does not move" (syllabics: ᐊᒑᐦᑯᐢ ᐁᑳ ᑳ ᐋᐦᒌᐟ).[60]
In Mi'kmawi'simk the star is named Tatapn.[61]
In the ancient Finnish worldview, the North Star has also been called taivaannapa and naulatähti ("the nailstar") because it seems to be attached to the firmament or even to act as a fastener for the sky when other stars orbit it. Since the starry sky seemed to rotate around it, the firmament is thought of as a wheel, with the star as the pivot on its axis. The names derived from it were sky pin and world pin.[citation needed]
Distance
[edit]
Since Leavitt's discovery of the Cepheid variable period-luminosity relationship, and corresponding utility as a standard candle, the distance to Polaris has been highly sought-after by astronomers. It is the closest Cepheid to Earth, and thus key to calibrating the Cepheid standard candle; Cepheids form the base of the cosmic distance ladder by which to probe the cosmological nature of the universe.[62]
Distance measurement techniques depend on whether or not components A and B are a physical pair, that is, gravitationally bound. If they are, then their estimated distance can be presumed to be equal.[b] Gravitational binding of this pair is well supported by observations, and the presumption of common distance is widely adopted in historical and recent estimates.[64][65][66][26][67][62][14][9]
For most of the 20th century, available observation technologies remained inadequate to precisely measure absolute parallax.[68][62] Instead, the main technique was to use theoretical models of stellar evolution for both main sequence and giant stars, combined with spectroscopic and photometric data to estimate distances. Such modeling relies on theoretical assumptions and guesses, and contains much systematic error and statistical uncertainties in population data. Even by 2013, these techniques were still struggling to achieve even 10% precision in either main sequence[69] or Cepheid[14] modeling.
Further progress was thus limited until the advent of Hipparcos, the first instrument able to engage in all-sky absolute parallax astrometry.[68] Its first data release was in 1997.
Selected distance estimates to Polaris
Published
Component
Distance
Source
Notes
ly
pc
1966
B
(359)[c]
(110)[c]
Fernie[64]
Photometry and modeling of B[c]
1977
B
(399)[d]
(122)[d]
Turner[65]
Photometry and modeling of B[d]
1978
A
356*
109*
Gauthier and Fernie[66]
Modeling extinction and Cepheid evolution of A
1996
B
359*
110*
Kamper[26]
Photometry and modeling of B, reproducing prior estimates
1997
A
431±29
132±9
Hipparcos[70]
All-sky/absolute[68] parallax observations, of the primary variable[e]
2004-2013
A, B
307±13
94±4
Turner/Turner et al
Cepheid evolution modeling[30], cluster kinematics and ZAMS fitting[30][67], photometry and modeling of B[67], spectral line ratios of A calibrated on yellow supergiants[62]
329±10
101±3
323±7
99±2
2007[f]
A
432±6
133±2
Hipparcos[2][69]
All-sky/absolute parallax observations, revised analysis, of the primary variable[f]
2008
B
357*
109.5*
Usenko & Klochkova[7]
Photometry and modeling of B
2014
A
>385
>118
Neilson[71]
Cepheid evolution modeling, independent of any distance prior
2018
B
521±20
160±6
Hubble, Bond et al.[14]
Relative[68] parallax of the wide component referencing photometrically-calibrated background stars
2018
B
445.3±1.7
136.6±0.5
Gaia DR2[72]
All-sky/absolute[68] parallax observations, of the wide component[g]
2020
B
446.5±1.1
136.9±0.3
Gaia DR3[5][9]
All-sky/absolute parallax observations, of the wide component[h]
^ * This estimate didn't state its uncertainty
After the arrival of the Hipparcos data, the distance to Polaris and consequent analysis of its Cepheid variation was controversial. The Hipparcos distance for Polaris was broadly but not universally adopted.[20] Immediately, the Hipparcos data for the nearest few hundred Cepheids appeared to clarify Cepheid models and to clear up then-tension in higher rungs of the distance ladder.[70] However alternatives remained; particularly by Turner et al, who published several papers between 2004 and 2013.[62]
Stellar parallax is the basis for the parsec, which is the distance from the Sun to an astronomical object which has a parallax angle of one arcsecond. (1 AU and 1 pc are not to scale, 1 pc = about 206265 AU)
In 2018, Bond et al[14] used the Hubble Space Telescope to provide an alternate direct measurement of Polaris's parallax; they summarize the back-and-forth:
However, Turner et al. (2013, hereafter TKUG13)[62] argue that the parallax of Polaris is considerably larger, 10.10 ± 0.20 mas (d = 99±2 pc). The evidence cited by TKUG13 for this “short” distance includes (1) a photometric parallax for Polaris B based on measured photometry, spectral classification, and main-sequence fitting; (2) a claim that there is a sparse cluster of A-, F-, and G-type stars within 3° of Polaris, with proper motions and radial velocities similar to that of the Cepheid, for which the Hipparcos parallaxes combined with main-sequence fitting give a distance of 99 pc; and (3) a determination of the absolute visual magnitude of Polaris based on line ratios in high-resolution spectra, calibrated against supergiants with well-established luminosities. [...]
[...]
In a critique of the TKUG13 paper, van Leeuwen (2013, hereafter L13)[69] defended the Hipparcos parallax by presenting details of the solution, concluding that “the Hipparcos data cannot in any way support” the large parallax advocated by TKUG13. Using Hipparcos data, L13 also questioned the reality of the sparse cluster proposed by TKUG13, presenting evidence against it both from the color versus absolute-magnitude diagram for stars within 3° of Polaris, and their non-clustered distribution of proper motions. Lastly, L13 examined the absolute magnitudes of nearly 400 stars of spectral type F3 V in the Hipparcos catalog with parallax errors of less than 10%, and showed that the absolute magnitude of Polaris B would fall well within the observed MV distribution for F3 V stars, based on either the Hipparcos parallax of A or the larger parallax proposed by TKUG13. Thus, he concluded that the photometric parallax of B does not give a useful discriminant.
— [14]
Bond et al go on to find a trigonometric parallax (independent of Hipparcos) that implies a distance further-still than the "long" Hipparcos distance, well outside the plausible range of the "short" distance estimates.
The next major step in high precision parallax measurements comes from Gaia, a space astrometry mission launched in 2013 and intended to measure stellar parallax to within 25 microarcseconds (μas).[74] Although it was originally planned to limit Gaia's observations to stars fainter than magnitude 5.7, tests carried out during the commissioning phase indicated that Gaia could autonomously identify stars as bright as magnitude 3. When Gaia entered regular scientific operations in July 2014, it was configured to routinely process stars in the magnitude range 3 – 20.[75] Beyond that limit, special procedures are used to download raw scanning data for the remaining 230 stars brighter than magnitude 3; methods to reduce and analyse these data are being developed; and it is expected that there will be "complete sky coverage at the bright end" with standard errors of "a few dozen μas".[76]
Gaia DR2 does not include a parallax for Polaris A, but a distance inferred from Polaris B is 136.6±0.5 pc (445.5±1.7 ly),[72] somewhat further than most previous estimates and (in principle) considerably more accurate. There are known to be considerable systematic uncertainties in DR2.[77]
Gaia DR3 significantly improved both the statistical and systematic uncertainties, although the latter remain numerous and on the order of 10–60 μas[63]; the new estimate is 136.9±0.3 pc (446.5±1.1 ly) using the baseline parallax zeropoint correction.[5][9][h]
Gaia DR4 (expected December 2026) will further improve the statistical and systematic uncertainties in general, and the data pipelines for variable and multiple stars in particular.[78] Multistar orbital solutions will become available, greatly aiding the study of Cepheids and Polaris, and in particular, may enable solving the outer AB orbit.[9]
In popular culture
[edit]
Polaris is depicted in the flag and coat of arms of the Canadian Inuit territory of Nunavut,[79] the flag of the U.S. states of Alaska and Minnesota,[80] and the flag of the U.S. city of Duluth, Minnesota.[81][82]
Vexillology
[edit]
Flag of Nunavut
Flag of Alaska
Flag of Minnesota
Flag of Duluth, Minnesota
Flag of Maine
Flag of Maine (1901–1909)
Flag of the Pan-American Exposition (1901)[83]
Sledge flag used by Francis Leopold McClintock in the Arctic (1852–1854)[84]
Heraldry
[edit]
Coat of arms of Nunavut
Seal of Minnesota
Seal of Maine
Coat of arms of Utsjoki[citation needed]
Ships
[edit]
The Chinese spy ship Beijixing is named after Polaris.
USS Polaris is named after Polaris
Gallery
[edit]
Polaris is the brightest star in the constellation of Ursa Minor (upper right).
Big Dipper and Ursa Minor in relation to Polaris
A view of Polaris in a small telescope. Polaris B is separated by 18 arc seconds from the primary star, Polaris A.
Polaris, its surrounding integrated flux nebula, and NGC188[dubious – discuss]
See also
[edit]
Stars portal
Astronomy portal
Extraterrestrial sky (for the pole stars of other celestial bodies)
List of nearest supergiants
Polar alignment
Sigma Octantis
Polaris Flare
Regiment of the North Pole
Notes
[edit]
^If A and B are a physical pair, then they share the same parallax; see #Distance
^Their minimum spatial separation is the angular separation: 0.09 mrad (18.2 arcseconds), i.e. 0.009% of their distance from Earth; it could be higher (2x-5x) depending on the orbital eccentricity and orientation of the apsides to Earth's sightline. In any case, distance estimate uncertainties have far exceeded 0.2%, with only Gaia approaching the latter precision, when neglecting systematic uncertainties.[63] Future Gaia data may enable solving this outer orbit, constraining the apsides and thus precisely determining the distance between the components.
^ abcThe paper only estimates an absolute magnitude of roughly 3.3 with an apparent magnitude of 8.51. That implies a distance modulus of 5.21, implying a distance around 110 pc. A notional magnitude error of ±0.3 would correspond to roughly ±16 pc error.
^ abcThe paper only estimates an absolute magnitude of roughly 3.16. Taken with the quoted apparent magnitude 8.6, that implies a distance modulus of 5.44, implying a distance around 122 pc. A notional magnitude error of ±0.1 would correspond to roughly ±6 pc error. Extinction was concluded to be negligible.
^Parallax 7.56±0.48 mas
^ abParallax 7.54±0.11 mas; observations from 1989 to 1993, first analysis published 1997, revised analysis published 2007.
^Statistical distance calculated using a weak distance prior
^ abThe raw parallax is 7.2869±0.0178 mas; applying a basic systematic[63] correction[73] gives 7.3045±0.0178 mas
References
[edit]
^
"Polaris | meaning in the Cambridge English Dictionary". Cambridge English Dictionary. Retrieved 11 December 2020.
^ abcdefVan Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ abcdefghijklmEvans, N. R.; Schaefer, G. H.; Bond, H. E.; Bono, G.; Karovska, M.; Nelan, E.; Sasselov, D.; Mason, B. D. (2008). "Direct Detection of the Close Companion of Polaris with The Hubble Space Telescope". The Astronomical Journal. 136 (3): 1137. arXiv:0806.4904. Bibcode:2008AJ....136.1137E. doi:10.1088/0004-6256/136/3/1137. S2CID 16966094.
^ abcdSamus, N. N.; Kazarovets, E. V.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
^ abcdVallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ abcdLee, B. C.; Mkrtichian, D. E.; Han, I.; Park, M. G.; Kim, K. M. (2008). "Precise Radial Velocities of Polaris: Detection of Amplitude Growth". The Astronomical Journal. 135 (6): 2240. arXiv:0804.2793. Bibcode:2008AJ....135.2240L. doi:10.1088/0004-6256/135/6/2240. S2CID 12176373.
^ abcdefghiUsenko, I. A.; Klochkova, V. G. (2008). "Polaris B, an optical companion of the Polaris (α UMi) system: Atmospheric parameters, chemical composition, distance and mass". Monthly Notices of the Royal Astronomical Society: Letters. 387 (1): L1. arXiv:0708.0333. Bibcode:2008MNRAS.387L...1U. doi:10.1111/j.1745-3933.2008.00426.x. S2CID 18848139.
^Campbell, William Wallace (1913). "The radial velocities of 915 stars". Lick Observatory Bulletin. 229: 113. Bibcode:1913LicOB...7..113C. doi:10.5479/ADS/bib/1913LicOB.7.113C.
^ abcdefghijklmEvans, Nancy Remage; Schaefer, Gail H.; Gallenne, Alexandre; Torres, Guillermo; Horch, Elliott P.; Anderson, Richard I.; Monnier, John D.; Roettenbacher, Rachael M.; Baron, Fabien; Anugu, Narsireddy; Davidson, James W.; Kervella, Pierre; Bras, Garance; Proffitt, Charles; Mérand, Antoine (2024-08-01). "The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array". The Astrophysical Journal. 971 (2): 190. arXiv:2407.09641. Bibcode:2024ApJ...971..190E. doi:10.3847/1538-4357/ad5e7a. ISSN 0004-637X.
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α Draconis) lay a mere 0°.1 from the pole. Deneb (α Cygni) will be the brightest star near the pole in about 8000 years' time, at a distance of 7°.5.
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^Lebans, Jim (2022-09-29). "Mi'kmaw astronomer says we should acknowledge we live under Indigenous skies". Canadian Broadcasting Corporation. Retrieved 2022-12-21.
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^ abGauthier, R. P.; Fernie, J. D. (1978). "The reddening of Polaris". Publications of the Astronomical Society of the Pacific. 90: 739. Bibcode:1978PASP...90..739G. doi:10.1086/130422.
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Preceded by
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Desert Safari Dubai - Dune Buggy Rental & ATV Quad Bike Tours - Marasi Drive - Dubai - United Arab Emirates, Lake Central Tower 4th Floor - Office 404 مراسي درايف - الخليج التجاري - دبي - United Arab Emirates
Desert Safari Dubai - Dune Buggy Rental & ATV Quad Bike Tours - Marasi Drive - Dubai - United Arab Emirates, Lake Central Tower 4th Floor - Office 404 مراسي درايف - الخليج التجاري - دبي - United Arab Emirates
Desert Safari Dubai - Dune Buggy Rental & ATV Quad Bike Tours - Marasi Drive - Dubai - United Arab Emirates, Lake Central Tower 4th Floor - Office 404 مراسي درايف - الخليج التجاري - دبي - United Arab Emirates
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