(8231) Tetsujiyamada Main-belt Asteroid
Discovered on 6 October 1997 by Endate, K., Watanabe, K. at Kitami.
Named in honor of Tetsuji Yamada (b. 1952), a well-known amateur astronomer in western Japan and the first secretary of the Fukuoka Astronomical Society (1977-1981). He has a large astronomical following, complementing his strong interest in astronomy education. His major interests include observing planets and comets. Name proposed by the discoverers following a suggestion by Y. Yamada.Naming citation (19990728/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tetsujiyamada is today
Seen from above the solar system on 2026-10-14: Tetsujiyamada is 2.85 au from the Sun and 1.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8231 |
| Provisional designation | 1997 TX17 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.32 km (#7,293 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.250 |
| Absolute magnitude (H) | 13.2 |
| Orbital period | 4.82 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.83 – 2.88 au |
| Eccentricity | 0.00855 |
| Inclination | 2.97° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 6 October 1997
- (14105) Nakadai
- (14981) Uenoiwakura
- (15390) Znojil
- (15907) Robot
- (15910) Shinkamigoto
- (24960) Usukikenichi
- (48798) Penghuanwu