(2230) Yunnan Main-belt Asteroid
Discovered on 29 October 1978 by Purple Mountain Observatory at Nanking.
Named for a province along the southwestern border of China. The Yunnan Observatory is situated in its capital city of Kunming.Naming citation (MPC 6059), IAU / Minor Planet Center, via NASA/JPL
Where Yunnan is today
Seen from above the solar system on 2026-10-14: Yunnan is 2.71 au from the Sun and 1.73 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2230 |
| Provisional designation | 1978 UT1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.4 km (#4,342 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.258 |
| Rotation period | 10.0 hours |
| Absolute magnitude (H) | 12.17 |
| Orbital period | 4.83 years |
| Semi-major axis | 2.86 au |
| Perihelion – aphelion | 2.69 – 3.03 au |
| Eccentricity | 0.0600 |
| Inclination | 2.57° |
| Closest distance between its orbit and Earth's (MOID) | 1.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.