(8432) Tamakasuga Main-belt Asteroid
Discovered on 27 December 1997 by A. Nakamura at Kuma Kogen.
Named in honor of Ryoji Matsumoto (b. 1972), Japanese sumo wrestler whose professional name is Tamakasuga. Born in Ehime prefecture, where this minor planet was discovered, he became a professional wrestler in 1994. In 1996 he was promoted to “Makunouchi”, the top division in the official listing of rank. Famous for his powerful “tsuki-oshi”, or pushing-thrusting style, Tamakasuga has won the Outstanding Performance Award, the Technique Prize and the Fighting Spirit Prize (twice) in his 26 tournaments.Naming citation (19980610/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tamakasuga is today
Seen from above the solar system on 2026-10-14: Tamakasuga is 2.66 au from the Sun and 3.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8432 |
| Provisional designation | 1997 YD18 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.2 km (#4,489 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0710 |
| Rotation period | 12.1 hours |
| Absolute magnitude (H) | 13.64 |
| Orbital period | 5.66 years |
| Semi-major axis | 3.18 au |
| Perihelion – aphelion | 2.66 – 3.69 au |
| Eccentricity | 0.161 |
| Inclination | 2.35° |
| Closest distance between its orbit and Earth's (MOID) | 1.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 27 December 1997
- (10234) Sixtygarden
- (15938) Bohnenblust
- (16861) Lipovetsky
- (31189) Tricomi
- (31190) Toussaint
- (33103) Pintar
- (52649) Chrismith
- (65885) Lubenow