(20399) Michaelesser Main-belt Asteroid
Discovered on 20 July 1998 by ODAS at Caussols.
Michael Lesser works at the University of Arizona Steward Observatory. He is best known for his pioneering work in high quantum efficiency CCDs and for his work on the detectors for the Hubble Space Telescope and ground-based observatories, many of which are used in the current surveys for minor planets.Naming citation (20051215/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Michaelesser is today
Seen from above the solar system on 2026-10-14: Michaelesser is 2.87 au from the Sun and 2.83 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20399 |
| Provisional designation | 1998 OO |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.35 km (#6,260 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0580 |
| Absolute magnitude (H) | 14.19 |
| Orbital period | 5.62 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.81 – 3.52 au |
| Eccentricity | 0.112 |
| Inclination | 4.38° |
| Closest distance between its orbit and Earth's (MOID) | 1.79 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Michael
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- (4477) Kelley
- (4599) Rowan
- (5373) Michaelkurtz
- (5554) Keesey
- (5569) Colby
- (6406) Mikejura
- (6569) Ondaatje
- (7738) Heyman
- (7936) Mikemagee
- (8032) Michaeladams
- (8129) Michaelbusch
All asteroids named after someone called Michael
Also discovered on 20 July 1998
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- (24996) Zerocalcare
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- (74080) Philippestee