(21311) Servius Main-belt Asteroid
Discovered on 4 December 1996 by V. S. Casulli at Colleverde.
Servius Tullius, sixth king of Rome, reigned from 578 to 535 B.C. He constructed the first wall around the city.Naming citation (20020526/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Servius is today
Seen from above the solar system on 2026-10-14: Servius is 2.03 au from the Sun and 1.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21311 |
| Provisional designation | 1996 XC9 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.29 |
| Orbital period | 3.32 years |
| Semi-major axis | 2.23 au |
| Perihelion – aphelion | 2.02 – 2.44 au |
| Eccentricity | 0.0945 |
| Inclination | 6.60° |
| Closest distance between its orbit and Earth's (MOID) | 1.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 4 December 1996
- (8925) Boattini
- (11134) Ceske Budejovice
- (12447) Yatescup
- (18531) Strakonice
- (19331) Stefanovitale
- (20172) Martin
- (22456) Salopek
- (24890) Amaliafinzi
- (27923) Dimitribartolini
- (32987) Uyuni
- (79347) Medlov