(20613) Chibaken Main-belt Asteroid
Discovered on 11 September 1999 by LONEOS at Anderson Mesa.
Chiba prefecture is located east of Tokyo. In 2011, some areas were damaged during the Tohoku earthquake.Naming citation (20120506/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Chibaken is today
Seen from above the solar system on 2026-10-14: Chibaken is 2.85 au from the Sun and 1.96 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20613 |
| Provisional designation | 1999 RE240 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.16 km (#8,706 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.186 |
| Absolute magnitude (H) | 13.74 |
| Orbital period | 5.34 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.73 – 3.38 au |
| Eccentricity | 0.107 |
| Inclination | 12.4° |
| Closest distance between its orbit and Earth's (MOID) | 1.73 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 11 September 1999
- (12583) Buckjean
- (13396) Midavaine
- (16065) Borel
- (20517) Judycrystal
- (20597) Pickersgill
- (21685) Francomallia
- (21686) Koschny
- (21687) Filopanti
- (36061) Haldane
- (36169) Grosseteste
- (38270) Wettzell
- (40440) Dobrovsky