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It has been calculated that Ceres averages one such cryovolcano every 50 million years. [45] Yamor Mons (previously named Ysolo Mons), near the north pole, has a diameter of 16 km [ 48 ] and is the only other Cererian mountain with the shape of Ahuna Mons, though old and battered, the cold temperatures at the pole have preserved its shape. [ 45 ]
Ceres is saturated with impact craters.Many have a central pit or bright spot. In the first batch of 17 names approved by the IAU, craters north of 20° north latitude had names beginning with A–G (with Asari being the furthest north), those between 20° north and south latitude beginning with H–R, and those further south beginning with S–Z (with Zadeni being the furthest south).
Ceres has an axial tilt of 4°, [10] small enough for its polar regions to contain permanently shadowed craters that are expected to act as cold traps and accumulate water ice over time, similar to what occurs on the Moon and Mercury. About 0.14% of water molecules released from the surface are expected to end up in the traps, hopping an ...
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There are indications that Ceres may have a tenuous atmosphere and water frost on the surface. Surface water ice is unstable at distances less than 5 AU from the Sun, so it is expected to vaporize if it is exposed directly to solar radiation. Water ice can migrate from the deep layers of Ceres to the surface, but escapes in a very short time.
The findings confirm the presence of a subsurface reservoir of brine - salt-enriched water - remnants of a vast subsurface ocean that has been gradually freezing. Dwarf planet Ceres is 'ocean ...
This is a list of officially named craters in the Solar System as named by IAU's Working Group for Planetary System Nomenclature.As of 2017, there is a total of 5,223 craters on 40 astronomical bodies, which includes minor planets (asteroids and dwarf planets), planets, and natural satellites. [1]
Like most 70-150 km wide Ceresian impact craters, Occator has a central depression rather than a central peak, with its original central peak having collapsed into 9–10 km wide depression, ~1 km deeper than the crater floor. [17] [16] Data indicates that magnesium sulfide (MgS) deposits were in place after the central peak's uplift and collapse.