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Its best-fit shape is a triaxial ellipsoid with dimensions a = 483.1 km, b = 481.0, km and c = 445.9 km, with c being the north-south axis and a and b the semimajor and semiminor equatorial axes. Combining total mass with volume gives a bulk density of 2,162 kg/m 3 .
It is an oblate spheroid, with an equatorial diameter 8% larger than its polar diameter. [2] Measurements from the Dawn spacecraft found a mean diameter of 939.4 km (583.7 mi) [2] and a mass of 9.38 × 10 20 kg. [62] This gives Ceres a density of 2.16 g/cm 3, [2] suggesting that a quarter of its mass is water ice. [63]
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
Diameter (km) Image Aymuray Tholi: Quechua harvest festival in May, meaning 'the song of the harvest' [132] 81 Bagach Tholus: Bagach(Багач), Belarusian harvest festival held on the 21st of September [133] 4.3 Cerealia Tholus: Cerealia,the major festival in Ancient Rome to celebrate the grain goddess Ceres (8 days in mid- to late-April ...
Many TNOs in the size range of about 400–1000 km have oddly low densities, in the range of about 1.0–1.2 g/cm 3, that are substantially less than those of dwarf planets such as Pluto, Eris and Ceres, which have densities closer to 2. Brown has suggested that large low-density bodies must be composed almost entirely of water ice since he ...
At 513 ± 3 km in diameter, [9] Pallas is slightly smaller than Vesta (525.4 ± 0.2 km [48]). The mass of Pallas is 79% ± 1% that of Vesta, 22% that of Ceres, and a quarter of one percent that of the Moon. Pallas is farther from Earth and has a much lower albedo than Vesta, and hence is dimmer as seen from Earth.
µ = m / M − m , where m is the mass of the body, and M is the aggregate mass of all the bodies that occupy its orbital zone. [43] [#] Π is the capacity to clear the neighbourhood (greater than 1 for planets) by Margot. Π = k m a − + 9 / 8 , where k = 807 for units of Earth masses and AU. [45]
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.