(21720) Pilishvili Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Anna Pilishvili (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her botany project. She attends the Forest Hills High School, Forest Hills, New York, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Pilishvili is today
Seen from above the solar system on 2026-10-14: Pilishvili is 2.21 au from the Sun and 3.20 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21720 |
| Provisional designation | 1999 RQ119 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.16 km (#14,797 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.158 |
| Rotation period | 4.00 hours |
| Absolute magnitude (H) | 15.06 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.04 – 2.58 au |
| Eccentricity | 0.117 |
| Inclination | 7.57° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Anna
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- (20180) Annakoleny
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- (24930) Annajamison
All asteroids named after someone called Anna
Also discovered on 9 September 1999
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