(20633) Robertluther Outer Main-belt Asteroid
Discovered on 2 October 1999 by LINEAR at Socorro.
Robert Luther (b. 1987) is a German scientist at the Museum für Naturkunde Berlin. He is a member of the DART and Hera Science Teams and is engaged in planetology and planetary defense by modeling impactor deflection and impact events on Earth and other bodies.Naming citation (WGSBN Bull. 6, #11, 31), IAU / Minor Planet Center, via NASA/JPL
Where Robertluther is today
Seen from above the solar system on 2026-10-14: Robertluther is 3.64 au from the Sun and 3.88 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20633 |
| Provisional designation | 1999 TU93 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 6.66 km (#8,050 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.209 |
| Absolute magnitude (H) | 13.59 |
| Orbital period | 5.77 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 2.80 – 3.64 au |
| Eccentricity | 0.130 |
| Inclination | 3.42° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Robert
- (1955) McMath
- (3514) Hooke
- (3875) Staehle
- (4564) Clayton
- (4809) Robertball
- (5109) Robertmiller
- (5308) Hutchison
- (5477) Holmes
- (5585) Parks
- (5636) Jacobson
- (5739) Robertburns
- (5817) Robertfrazer
All asteroids named after someone called Robert
Also discovered on 2 October 1999
- (12929) Periboea
- (12935) Zhengzhemin
- (13406) Sekora
- (16087) Rhythmgarg
- (16094) Scottmccord
- (20629) Robert
- (20631) Stefuller
- (20632) Carlyrosser
- (20634) Marichardson
- (20635) Robinandrews
- (20636) Romanhirsch
- (21801) Ancerl