(15797) Tachikoutenkibu Main-belt Asteroid
Discovered on 22 October 1993 by Hirasawa, M., Suzuki, S. at Nyukasa.
Tachikoutenkibu is the commonly-used Japanese name for the Astronomy and Meteorology Club of Tachikawa High School, Tokyo, established in 1943. Through its continuous astronomical and meteorological observations, the club has produced many astronomers, meteorologists, and amateur observers and enthusiasts, including the second discoverer.Naming citation (WGSBN Bull. 6, #14, 6), IAU / Minor Planet Center, via NASA/JPL
Where Tachikoutenkibu is today
Seen from above the solar system on 2026-10-14: Tachikoutenkibu is 2.05 au from the Sun and 1.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15797 |
| Provisional designation | 1993 UD3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.11 km (#12,485 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.380 |
| Absolute magnitude (H) | 13.98 |
| Orbital period | 3.72 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 2.04 – 2.76 au |
| Eccentricity | 0.151 |
| Inclination | 5.33° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.