Search results
Results from the WOW.Com Content Network
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 per cent of its true value of 939 km (583 mi).
At a diameter of 964 km, Ceres is the largest object in the main asteroid belt and comprises about one-third of the belt's total mass. Ceres possesses sufficient gravity to form a rounded, ellipsoid shape, suggesting that it is close to being in hydrostatic equilibrium [ 6 ] —one of the conditions for defining a dwarf planet according to the ...
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 ...
However, Ceres (r = 470 km) ... This list contains a selection of objects estimated to be between 100 and 199 km in radius (200 and 399 km in diameter). The largest ...
Diameter (km) Discovered Spacecraft Year(s) Closest approach (km) Closest approach (asteroid radii) Notes Landmark(s) 1 Ceres: 939.4: January 1, 1801: Dawn: 2014–present: 375: 0.80: Dawn took its first "close up" picture of Ceres in December 2014, and entered orbit in March 2015: First likely dwarf planet visited by a spacecraft, largest ...
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 ...
The ratio column compares the crater diameter with the diameter of the impacted celestial body. ... 1,550 km (963 mi) 4,880 km ... Ceres (dwarf planet) Kerwan: 284 km ...
The dwarf planet Ceres is by far the largest asteroid, with a diameter of 940 km (580 mi). The next largest are 4 Vesta and 2 Pallas , both with diameters of just over 500 km (300 mi). Vesta is the brightest of the four main-belt asteroids that can, on occasion, be visible to the naked eye. [ 70 ]