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Herschel underestimated its diameter at 260 km (160 mi) in 1802; in 1811, German astronomer Johann Hieronymus Schröter overestimated it as 2,613 km (1,624 mi). [25] In the 1970s, infrared photometry enabled more accurate measurements of its albedo, and Ceres's diameter was determined to within ten percent of its true value of 939 km (583 mi).
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, at 950 km in diameter, is close to equilibrium, but some deviations from equilibrium shape remain unexplained. [14] Much larger objects, such as Earth's moon and the planet Mercury, are not near hydrostatic equilibrium today, [ 15 ] [ 16 ] [ 17 ] though the Moon is composed primarily of silicate rock and Mercury of metal (in contrast to ...
Among the numbered minor planets with an unambiguous period solution are (459872) 2014 EK 24, a 60-meter sized stony NEO with a period of 352 seconds, as well as (335433) 2005 UW 163 and (60716) 2000 GD 65, two main-belt asteroids, with a diameter of 0.86 and 2.25 kilometers and a period of 1.29 and 1.95 hours, respectively (see full list).
This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
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 ...
10 Hygiea is a major asteroid located in the main asteroid belt.With a mean diameter of between 425 and 440 km and a mass estimated to be 3% of the total mass of the belt, [11] it is the fourth-largest asteroid in the Solar System by both volume and mass, and is the largest of the C-type asteroids (dark asteroids with a carbonaceous surface) in classifications that use G type for 1 Ceres.
Diameter 10: 36 km 12.7: 10 km 15: 3.6 km 17.7: 1 km ... in the formula for m have been derived empirically, ... Asteroid 1 Ceres, ...