(15857) Touji Main-belt Asteroid
Discovered on 10 March 1996 by Endate, K., Watanabe, K. at Kitami.
Yasuo Touji (b. 1949) is an amateur astronomer in Ishigakijima, Okinawa Prefecture, Japan. He is now the Chief director of a local astronomy club, “Yaeyama Hoshinokai”, and contributes to the popularization of astronomy.Naming citation (MPC batch dated 2015-06-02), IAU / Minor Planet Center, via NASA/JPL
Where Touji is today
Seen from above the solar system on 2026-10-14: Touji is 2.15 au from the Sun and 2.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15857 |
| Provisional designation | 1996 EK1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.31 km (#14,457 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.361 |
| Absolute magnitude (H) | 14.49 |
| Orbital period | 3.43 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.99 – 2.56 au |
| Eccentricity | 0.125 |
| Inclination | 2.59° |
| Closest distance between its orbit and Earth's (MOID) | 0.983 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Yasuo
All asteroids named after someone called Yasuo