(5664) Eugster Main-belt Asteroid
Discovered on 6 March 1981 by S. J. Bus at Siding Spring.
Otto Eugster (b. 1938), professor at the University of Bern, investigates the chronologies and exposure histories of meteorites in space based on cosmic-ray effects. His work on the cosmic-ray exposure of lunar regolith has been fundamental to understanding the complex history of lunar materials.Naming citation (20020624/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Eugster is today
Seen from above the solar system on 2026-10-14: Eugster is 2.04 au from the Sun and 1.10 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5664 |
| Provisional designation | 1981 EX43 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.73 |
| Orbital period | 3.64 years |
| Semi-major axis | 2.37 au |
| Perihelion – aphelion | 2.04 – 2.69 au |
| Eccentricity | 0.138 |
| Inclination | 5.85° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Otto
- (2108) Otto Schmidt
- (10782) Hittmair
- (10787) Ottoburkard
- (11537) Guericke
- (12197) Jan-Otto
- (13610) Lilienthal
- (14468) Ottostern
- (19126) Ottohahn
- (35239) Ottoseydl
- (126315) Blathy
- (190504) Hermanotto
- (359103) Ottopiene
All asteroids named after someone called Otto
Also discovered on 6 March 1981
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- (3269) Vibert-Douglas
- (4564) Clayton
- (4965) Takeda
- (5223) McSween
- (8068) Vishnureddy
- (8455) Johnrayner
- (8794) Joepatterson
- (9282) Lucylim
- (9287) Klima
- (10699) Calabrese
- (11464) Moser