(18032) Geiss Main-belt Asteroid
Discovered on 20 June 1999 by LONEOS at Anderson Mesa.
Johannes Geiss (b. 1926) is a leading Swiss space scientist. He was PI on the Solar Wind Composition experiment aboard Apollo 11-16. The recipient of medals from learned societies of the U.S. and Europe, Geiss is a foreign member of the U.S. Academy of Sciences. The name was suggested by T. C. Owen.Naming citation (20060613/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Geiss is today
Seen from above the solar system on 2026-10-14: Geiss is 2.85 au from the Sun and 3.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18032 |
| Provisional designation | 1999 MG1 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.54 |
| Orbital period | 4.78 years |
| Semi-major axis | 2.84 au |
| Perihelion – aphelion | 2.45 – 3.23 au |
| Eccentricity | 0.137 |
| Inclination | 11.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.43 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Johannes
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All asteroids named after someone called Johannes