(21900) Orus Jupiter Trojan
Discovered on 9 November 1999 by T. Kobayashi at Oizumi.
Orus was an Achaean warrior who was killed by Hektor in Homer's Iliad.Naming citation (MPC batch dated 2016-02-22), IAU / Minor Planet Center, via NASA/JPL
Where Orus is today
Seen from above the solar system on 2026-10-14: Orus is 5.19 au from the Sun and 6.17 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21900 |
| Provisional designation | 1999 VQ10 |
| Orbit class | Jupiter Trojan |
| Diameter | 50.8 km (#729 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0750 |
| Rotation period | 13.4 hours |
| Absolute magnitude (H) | 10.04 |
| Orbital period | 11.6 years |
| Semi-major axis | 5.12 au |
| Perihelion – aphelion | 4.94 – 5.31 au |
| Eccentricity | 0.0367 |
| Inclination | 8.47° |
| Closest distance between its orbit and Earth's (MOID) | 3.95 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 November 1999
- (14220) Alexgibbs
- (19719) Glasser
- (20695) Santiagoiglesias
- (20696) Torresduarte
- (21942) Subramanian
- (21943) Diannacowern
- (21962) Scottsandford
- (23002) Jillhirsch
- (23003) Ziminski
- (23004) Triciatalbert
- (24101) Cassini
- (24102) Jacquescassini