(10502) Armaghobs Mars-crossing Asteroid
Discovered on 22 August 1987 by E. F. Helin at Palomar.
Armagh Observatory, founded in 1790 by Archbishop Richard Robinson, is a modern astronomical research institute with a rich heritage that includes T. R. Robinson's cup-anemometer, Dreyer's NGC Catalogue, Lindsay's Armagh-Dunsink-Harvard telescope and the work of the Estonian astronomer E. J. Opik.Naming citation (20010109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Armaghobs is today
Seen from above the solar system on 2026-10-14: Armaghobs is 1.57 au from the Sun and 1.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10502 |
| Provisional designation | 1987 QF6 |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 2.62 km (#16,027 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.258 |
| Rotation period | 25.0 hours |
| Absolute magnitude (H) | 15.01 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.57 – 3.04 au |
| Eccentricity | 0.318 |
| Inclination | 21.9° |
| Closest distance between its orbit and Earth's (MOID) | 0.740 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.