(1585) Union Main-belt Asteroid
Discovered on 7 September 1947 by E. L. Johnson at Johannesburg.
Where Union is today
Seen from above the solar system on 2026-10-14: Union is 3.55 au from the Sun and 3.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1585 |
| Provisional designation | 1947 RG |
| Orbit class | Main-belt Asteroid |
| Diameter | 55.3 km (#652 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0310 |
| Rotation period | 12.8 hours |
| Absolute magnitude (H) | 10.3 |
| Orbital period | 5.02 years |
| Semi-major axis | 2.93 au |
| Perihelion – aphelion | 2.03 – 3.83 au |
| Eccentricity | 0.308 |
| Inclination | 26.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.21 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by E. L. Johnson
- (1568) Aisleen
- (1580) Betulia
- (1607) Mavis
- (1609) Brenda
- (1618) Dawn
- (1623) Vivian
- (1731) Smuts
- (1760) Sandra
- (1819) Laputa
- (1885) Herero
- (1922) Zulu
- (2546) Libitina
← (1584) Fuji · (1586) Thiele →