(19731) Tochigi Main-belt Asteroid
Discovered on 9 December 1999 by LONEOS at Anderson Mesa.
Tochigi is a prefecture north of Tokyo. Its World Heritage site in Nikko houses shrines and temples associated with the Tokugawa Soguns. Part of Tochigi was damaged during the March 2011 earthquake.Naming citation (20120506/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tochigi is today
Seen from above the solar system on 2026-10-14: Tochigi is 3.45 au from the Sun and 3.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 19731 |
| Provisional designation | 1999 XA151 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.91 km (#5,151 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.260 |
| Absolute magnitude (H) | 12.41 |
| Orbital period | 5.71 years |
| Semi-major axis | 3.20 au |
| Perihelion – aphelion | 2.89 – 3.50 au |
| Eccentricity | 0.0962 |
| Inclination | 15.4° |
| Closest distance between its orbit and Earth's (MOID) | 1.91 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 December 1999
- (15523) Grenville
- (16135) Ivarsson
- (16150) Clinch
- (20730) Jorgecarvano
- (20731) Mothediniz
- (22032) Mikekoop
- (25589) Danicamckellar