(18281) Tros Jupiter Trojan
Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Tros was a grandson of Dardanos. His country was named Troas after him, and its principal city was Troy.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tros is today
Seen from above the solar system on 2026-10-14: Tros is 5.33 au from the Sun and 5.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18281 |
| Provisional designation | 4317 T-3 |
| Orbit class | Jupiter Trojan |
| Diameter | 14.0 km (#3,404 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0990 |
| Absolute magnitude (H) | 12.56 |
| Orbital period | 11.9 years |
| Semi-major axis | 5.22 au |
| Perihelion – aphelion | 4.68 – 5.77 au |
| Eccentricity | 0.105 |
| Inclination | 9.53° |
| Closest distance between its orbit and Earth's (MOID) | 3.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 16 October 1977
- (3798) de Jager
- (3936) Elst
- (4044) Erikhog
- (4108) Rakos
- (4722) Agelaos
- (4753) Phidias
- (4754) Panthoos
- (5610) Balster
- (5699) Munch
- (5700) Homerus
- (5984) Lysippus
- (6055) Brunelleschi
More named asteroids discovered by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T.
- (1743) Schmidt
- (1744) Harriet
- (1776) Kuiper
- (1777) Gehrels
- (1778) Alfven
- (1795) Woltjer
- (1808) Bellerophon
- (1809) Prometheus
- (1810) Epimetheus
- (1811) Bruwer
- (1812) Gilgamesh
- (1813) Imhotep
← (18278) Dymas · (18282) Ilos →