(20711) Seijisugita Main-belt Asteroid
Discovered on 5 December 1999 by LINEAR at Socorro.
Seiji Sugita (b. 1967) is a Japanese planetary scientist who led remote-sensing studies of asteroid Ryugu with optical cameras on JAXA’s Hayabusa2 spacecraft. His expertise in impact experiments enabled key contributions to NASA’s Deep Impact mission through observations of the impact event. Seiji also contributes to ESA’s Hera mission.Naming citation (WGSBN Bull. 6, #11, 33), IAU / Minor Planet Center, via NASA/JPL
Where Seijisugita is today
Seen from above the solar system on 2026-10-14: Seijisugita is 4.02 au from the Sun and 3.91 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20711 |
| Provisional designation | 1999 XF12 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.90 km (#7,763 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.162 |
| Rotation period | 22.9 hours |
| Absolute magnitude (H) | 12.85 |
| Orbital period | 5.64 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.23 – 4.11 au |
| Eccentricity | 0.296 |
| Inclination | 18.4° |
| Closest distance between its orbit and Earth's (MOID) | 1.30 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Seiji
All asteroids named after someone called Seiji
Also discovered on 5 December 1999
- (13858) Ericchristensen
- (14232) Curtismiller
- (14682) Davidhirsch
- (16112) Vitaris
- (20712) Shashiganesh
- (20725) Juliuscsotonyi
- (21989) Werntz
- (22022) Gould
- (22025) Dorisdaou
- (22026) Lindabillings
- (22027) Romanakofler
- (25455) Anissamak