(1872) Helenos Jupiter Trojan
Discovered on 24 March 1971 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Where Helenos is today
Seen from above the solar system on 2026-10-14: Helenos is 5.45 au from the Sun and 4.85 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1872 |
| Provisional designation | 1971 FG |
| Orbit class | Jupiter Trojan |
| Diameter | 34.0 km (#1,188 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Absolute magnitude (H) | 10.79 |
| Orbital period | 12.3 years |
| Semi-major axis | 5.32 au |
| Perihelion – aphelion | 5.06 – 5.58 au |
| Eccentricity | 0.0484 |
| Inclination | 14.6° |
| Closest distance between its orbit and Earth's (MOID) | 4.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 24 March 1971
- (1864) Daedalus
- (1870) Glaukos
- (1871) Astyanax
- (1877) Marsden
- (6672) Corot
- (6750) Katgert
- (11249) Etna
- (23403) Boudewijnbuch
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
← (1871) Astyanax · (1873) Agenor →