(10012) Tmutarakania Main-belt Asteroid
Discovered on 3 September 1978 by Chernykh, N. S., Karachkina, L. G. at Nauchnyj.
Tmutarakania was a Russian principality in the Tamanian peninsula from the tenth to the twelfth centuries.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tmutarakania is today
Seen from above the solar system on 2026-10-14: Tmutarakania is 2.90 au from the Sun and 3.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10012 |
| Provisional designation | 1978 RE3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.02 km (#12,693 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.190 |
| Absolute magnitude (H) | 14.74 |
| Orbital period | 3.82 years |
| Semi-major axis | 2.44 au |
| Perihelion – aphelion | 1.98 – 2.90 au |
| Eccentricity | 0.188 |
| Inclination | 1.56° |
| Closest distance between its orbit and Earth's (MOID) | 0.987 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.