Ahuna Mons /
The mountain imaged by the Dawn spacecraft. North is down.
|Peak||about 4 km (2 mi or 13,000 ft) high|
|Discoverer||Dawn spacecraft team|
|Eponym||Ahuna, harvest festival of the Sumi Naga from India.|
The mountain was discovered on images taken by the Dawn spacecraft in orbit around Ceres in 2015. It is estimated to have an average height of about 4 km (2.5 mi; 13,000 ft) and a maximum height of about 5 km (3.1 mi; 16,000 ft) on its steepest side; it is about 20 km (12 mi; 66,000 ft) wide at the base.
It has been proposed that Ahuna Mons formed as a cryovolcanic dome. It is the closest cryovolcano to the Sun yet discovered. It is roughly antipodal to the largest impact basin on Ceres, 280 km (170 mi) diameter Kerwan. Seismic energy from the Kerwan-forming impact may have been focused on the opposite side of Ceres, fracturing the outer layers of the area and facilitating the movement of high viscosity cryovolcanic magma (consisting of muddy water ice softened by its content of salts) that was then extruded onto the surface. Crater counts suggest that formation of the mountain continued into the last several hundred million years, making this a relatively young geological feature.
Ceres viewed by Dawn. The north face of Ahuna Mons projects above the center of the limb. North is down.
Context view of the mountain surrounded by lightly cratered terrain. Bright spots on Ceres can be seen at 11:00. North is up.
|Wikimedia Commons has media related to Ahuna Mons.|
- "PIA20348: Ahuna Mons Seen from LAMO". Jet Propulsion Lab. 7 March 2016. Retrieved 14 April 2016.
- Gazetteer of Planetary Nomenclature – Ahuna Mons
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- "The Mystery of Ahuna Mons, The Lonely Ice Volcano". States News Service. 23 January 2017. Retrieved 12 February 2017 – via Gale.
- Brown, Dwayne; Wendel, JoAnna; McCartney, Gretchen (6 September 2018). "The Legacy of NASA's Dawn, Near End of Mission". NASA. Retrieved 2 November 2018.
- Brown, Dwayne; Wendel, JoAnna; McCartney, Gretchen (1 November 2018). "NASA's Dawn Mission to Asteroid Belt Comes to End". NASA. Retrieved 2 November 2018.
- Chang, Kenneth (1 November 2018). "NASA's Dawn Mission to the Asteroid Belt Says Good Night - Launched in 2007, the spacecraft discovered bright spots on Ceres and forbidding terrain on Vesta". The New York Times. Retrieved 2 November 2018.
- Landau, Elizabeth; Dyches, Preston (8 June 2015). "Fly Over Ceres in New Video". NASA. Retrieved 9 June 2015.