(15840) Hiroshiendou Main-belt Asteroid
Discovered on 31 May 1995 by T. Okuni at Nanyo.
Hiroshi Endou (b. 1939) is a confectionery manufacturer and amateur astronomer, active in the Nanyo Astronomy Lovers Club since 1983.Naming citation (20100923/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hiroshiendou is today
Seen from above the solar system on 2026-10-14: Hiroshiendou is 3.14 au from the Sun and 3.94 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15840 |
| Provisional designation | 1995 KH1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.88 km (#9,109 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.294 |
| Rotation period | 6.45 hours |
| Absolute magnitude (H) | 13.43 |
| Orbital period | 4.66 years |
| Semi-major axis | 2.79 au |
| Perihelion – aphelion | 2.39 – 3.20 au |
| Eccentricity | 0.145 |
| Inclination | 10.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.37 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