(21166) Nobuyukishouji Main-belt Asteroid
Discovered on 6 December 1993 by T. Seki at Geisei.
Nobuyuki Maeda (b. 1957) and Shouji Higasioka (b. 1958) are brothers living in Aki city in Kochi prefecture. Nobuyuki, formerly a high school teacher, teaches astronomy at Geisel Observatory. Shouji is a comet hunter and volunteers for astronomy outreach activities.Naming citation (MPC batch dated 2019-08-27), IAU / Minor Planet Center, via NASA/JPL
Where Nobuyukishouji is today
Seen from above the solar system on 2026-10-14: Nobuyukishouji is 1.92 au from the Sun and 1.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21166 |
| Provisional designation | 1993 XH |
| Orbit class | Main-belt Asteroid |
| Rotation period | 11.8 hours |
| Absolute magnitude (H) | 15.61 |
| Orbital period | 3.30 years |
| Semi-major axis | 2.22 au |
| Perihelion – aphelion | 1.87 – 2.56 au |
| Eccentricity | 0.157 |
| Inclination | 5.39° |
| Closest distance between its orbit and Earth's (MOID) | 0.891 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Nobuyuki
All asteroids named after someone called Nobuyuki