(16439) Yamehoshinokawa Main-belt Asteroid
Discovered on 30 January 1989 by Fujii, T., Watanabe, K. at Kitami.
Yamehoshinokawa is a river in the southern part of Fukuoka prefecture. It passes from east to west through the center of Hoshino (“star field”) village, in Yame district, renowned for its beautiful starry sky.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yamehoshinokawa is today
Seen from above the solar system on 2026-10-14: Yamehoshinokawa is 2.88 au from the Sun and 2.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 16439 |
| Provisional designation | 1989 BZ |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.53 km (#7,079 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.279 |
| Rotation period | 92.5 hours |
| Absolute magnitude (H) | 12.99 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.38 – 2.91 au |
| Eccentricity | 0.101 |
| Inclination | 12.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.40 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.