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Ceres (minor-planet designation: 1 Ceres) is a dwarf planet in the middle main asteroid belt between the orbits of Mars and Jupiter. It was the first known asteroid , discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily , and announced as a new planet .
Occator / ɒ ˈ k eɪ t ər / is an impact crater located on Ceres, the largest object in the main asteroid belt that lies between the orbits of Mars and Jupiter, that contains "Spot 5", the brightest of the bright spots observed by the Dawn spacecraft. It was known as "Region A" in ground-based images taken by the W. M. Keck Observatory on ...
Ceres has spectral similarities to C-type asteroids, [3] which are rich in volatiles and carbonaceous compounds. Ceres is also sometimes classified as a G-type asteroid, [11] [12] which is a subtype of the Tholen C-class and characterized by abundant phyllosilicates, such as clay minerals. Ceres is not associated with any asteroid family or ...
The third-largest asteroid with an accurately measured mass, because it has moons, is 87 Sylvia at (14.76 ± 0.06) × 10 18 kg. Other large asteroids with masses measured from their moons are 107 Camilla and 130 Elektra. [3] [13] [1] For a more complete list, see List of Solar System objects by size.
As of 2022, the precise location of the Solar System in the clouds is an open question in astronomy. [259] Within 10 light-years of the Sun there are relatively few stars, the closest being the triple star system Alpha Centauri, which is about 4.4 light-years away and may be in the Local Bubble's G-Cloud. [260]
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Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most ...
The radar images showed the asteroid is roughly spherical and is one of a pair, called a binary system. The space rock has a small moonlet orbiting it from a distance of 1.9 miles (3 kilometers).