Main Asteroid Belt
The reservoir of most asteroids, orbiting the Sun between Mars and Jupiter.
Overview
The main asteroid belt between Mars and Jupiter, home to the great majority of known asteroids — from the dwarf planet Ceres down to countless small bodies.
Members
16 modelled members.
The largest object in the asteroid belt and the closest dwarf planet to the Sun — the first minor planet discovered, and the only one visited by the Dawn orbiter in the inner Solar System.
CategoryDwarf planetTypeCarbonaceous (C)Diameter939 kmDiscovered1801The second-most-massive asteroid and the brightest as seen from Earth, a differentiated basaltic body and the parent of the Vesta family, orbited by NASA's Dawn.
CategoryMain beltTypeBasaltic (V)Diameter525 kmDiscovered1807The third-most-massive asteroid, on a notably inclined orbit, the second minor planet ever discovered.
CategoryMain beltTypeCarbonaceous (C)Diameter513 kmDiscovered1802The fourth-largest asteroid and the largest carbonaceous one, nearly spherical, the parent of the Hygiea family.
CategoryMain beltTypeCarbonaceous (C)Diameter434 kmDiscovered1849One of the largest main-belt asteroids, a dark, primitive carbonaceous body.
CategoryMain beltTypeCarbonaceous (C)Diameter332 kmDiscovered1910One of the largest carbonaceous main-belt asteroids — not to be confused with Jupiter's moon Europa.
CategoryMain beltTypeCarbonaceous (C)Diameter315 kmDiscovered1858One of the largest main-belt asteroids, a dark carbonaceous body.
CategoryMain beltTypeCarbonaceous (C)Diameter289 kmDiscovered1903The largest stony (S-type) asteroid and the parent of the Eunomia family in the intermediate main belt.
CategoryMain beltTypeSilicaceous (S)Diameter268 kmDiscovered1851One of the largest asteroids, on a highly inclined orbit, the namesake of the Euphrosyne family.
CategoryMain beltTypeCarbonaceous (C)Diameter256 kmDiscovered1854A large outer-main-belt asteroid and the first asteroid found to have two moons — Romulus and Remus — making it the first known triple asteroid system.
CategoryMain beltTypeCarbonaceous (C)Diameter253 kmDiscovered1866The third asteroid ever discovered, a large stony main-belt body — one of the historic first four minor planets.
CategoryMain beltTypeSilicaceous (S)Diameter233 kmDiscovered1804A large metal-rich main-belt asteroid, the destination of NASA's Psyche mission to study a possible exposed planetary core.
CategoryMain beltTypeMetallic (M)Diameter222 kmDiscovered1852A large carbonaceous outer-main-belt asteroid, parent of the Themis family, on whose surface water ice has been detected.
CategoryMain beltTypeCarbonaceous (C)Diameter198 kmDiscovered1853The parent of the large Flora family of stony asteroids in the inner main belt.
CategoryMain beltTypeSilicaceous (S)Diameter136 kmDiscovered1847The parent body of the Eos family, a large K-type asteroid in the outer main belt.
CategoryMain beltTypeOtherDiameter104 kmDiscovered1882A Koronis-family main-belt asteroid imaged by the Galileo spacecraft in 1993, which revealed its tiny moon Dactyl — the first confirmed asteroid moon.
CategoryMain beltTypeSilicaceous (S)Diameter≈ 60 × 25 × 19 kmDiscovered1884
Knowledge connections
- Group includesCeres
- Group includes4 Vesta
- Group includes2 Pallas
- Group includes10 Hygiea
- Group includes16 Psyche
- Group includesIda
- Group includes704 Interamnia
- Group includes52 Europa
- Group includes511 Davida
- Group includes87 Sylvia
- Group includes31 Euphrosyne
- Group includes3 Juno
- Group includes15 Eunomia
- Group includes24 Themis
- Group includes221 Eos
- Group includes8 Flora
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
- NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.