(15790) Keizan Mars-crossing Asteroid
Discovered on 8 October 1993 by Mukai, M., Takeishi, M. at Kagoshima.
The Japanese priest Keizan Zenji (1268–1325) practiced asceticism at the Eiheiji Temple in Fukui prefecture and built Sojiji Temple in 1321. Afterwards he built temples in various parts of Japan to spread Zen Buddhism.Naming citation (WGSBN Bull. 4, #10, 7), IAU / Minor Planet Center, via NASA/JPL
Where Keizan is today
Seen from above the solar system on 2026-10-14: Keizan is 2.38 au from the Sun and 1.83 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15790 |
| Provisional designation | 1993 TC |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 5.61 km (#9,568 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.243 |
| Rotation period | 19.7 hours |
| Absolute magnitude (H) | 13.66 |
| Orbital period | 3.62 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 1.61 – 3.11 au |
| Eccentricity | 0.317 |
| Inclination | 22.9° |
| Closest distance between its orbit and Earth's (MOID) | 0.723 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 8 October 1993
- (6411) Tamaga
- (6924) Fukui
- (7097) Yatsuka
- (8099) Okudoiyoshimi
- (10560) Michinari
- (10828) Tomjones
- (15330) de Almeida
- (20066) Sagov
- (35170) Mizunochisato