(293787) Mucunbo Main-belt Asteroid
Discovered on 11 September 2007 by PMO NEO Survey Program at Purple Mountain.
Hiroshi Kimura (1937–2025), known as Mucunbo, was a Japanese astronomer who worked at the Purple Mountain Observatory for 25 years. He predicted the neckline for cometary dust tails, classified solutions to the Lane-Emden equation, and pioneered star formation studies in China. Hiroshi was a great mentor for outstanding young scientists.Naming citation (WGSBN Bull. 5, #23, 10), IAU / Minor Planet Center, via NASA/JPL
Where Mucunbo is today
Seen from above the solar system on 2026-10-14: Mucunbo is 2.36 au from the Sun and 2.30 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 293787 |
| Provisional designation | 2007 RB134 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.27 km (#16,665 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0600 |
| Absolute magnitude (H) | 17.14 |
| Orbital period | 3.66 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 1.90 – 2.85 au |
| Eccentricity | 0.198 |
| Inclination | 3.38° |
| Closest distance between its orbit and Earth's (MOID) | 0.902 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hiroshi
- (4965) Takeda
- (5379) Abehiroshi
- (5830) Simohiro
- (6244) Okamoto
- (7250) Kinoshita
- (7254) Kuratani
- (7264) Hirohatanaka
- (8197) Mizunohiroshi
- (8543) Tsunemi
- (8707) Arakihiroshi
- (8891) Irokawa
- (8923) Yamakawa
All asteroids named after someone called Hiroshi
Also discovered on 11 September 2007
- (171448) Guchaohao
- (207715) Muqinshuijiao
- (207716) Wangxichan
- (207717) Sa'a
- (207723) Jiansanjiang
- (210213) Hasler-Gloor
- (210230) Linyuanpei
- (210231) Wangdemin
- (210232) Zhangjinqiu
- (214883) Yuanxikun
- (236845) Houxianglin
- (333001) Calloway