(11809) Shinnaka Main-belt Asteroid
Discovered on 2 March 1981 by S. J. Bus at Siding Spring.
Yoshiharu Shinnaka (b. 1986) is a Japanese astronomer studying the physicochemical evolution of the early solar nebula through measurements of isotopic ratios of molecules in comets.Naming citation (MPC batch dated 2017-03-12), IAU / Minor Planet Center, via NASA/JPL
Where Shinnaka is today
Seen from above the solar system on 2026-10-14: Shinnaka is 2.12 au from the Sun and 1.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11809 |
| Provisional designation | 1981 EG18 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.72 |
| Orbital period | 3.40 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 2.12 – 2.41 au |
| Eccentricity | 0.0634 |
| Inclination | 4.71° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Yoshiharu
All asteroids named after someone called Yoshiharu
Also discovered on 2 March 1981
- (2884) Reddish
- (2919) Dali
- (2980) Cameron
- (2981) Chagall
- (2990) Trimberger
- (3000) Leonardo
- (3121) Tamines
- (3122) Florence
- (3207) Spinrad
- (3252) Johnny
- (3304) Pearce
- (3524) Schulz