(15250) Nishiyamahiro Main-belt Asteroid
Discovered on 28 February 1990 by Endate, K., Watanabe, K. at Kitami.
Hiroshi Nishiyama (b. 1962) has been a director of the Baienno Sato Observatory since 1998. He was previously a teacher of earth sciences in a high school. His interests include observations of various galaxies, searching for supernovae and astronomical teaching.Naming citation (20100527/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Nishiyamahiro is today
Seen from above the solar system on 2026-10-14: Nishiyamahiro is 2.85 au from the Sun and 3.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15250 |
| Provisional designation | 1990 DZ |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.92 km (#10,767 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.265 |
| Rotation period | 6.76 hours |
| Absolute magnitude (H) | 13.91 |
| Orbital period | 5.05 years |
| Semi-major axis | 2.94 au |
| Perihelion – aphelion | 2.45 – 3.44 au |
| Eccentricity | 0.169 |
| Inclination | 9.50° |
| Closest distance between its orbit and Earth's (MOID) | 1.46 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