(21650) Tilgner Main-belt Asteroid
Discovered on 17 July 1999 by S. Sposetti at Gnosca.
Bruno Tilgner (1933-2002) spent most of his career working for the European Space Agency. He later became a member of the strategy office. He greatly helped the discoverer in the identification of artificial satellites.Naming citation (20021120/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tilgner is today
Seen from above the solar system on 2026-10-14: Tilgner is 2.11 au from the Sun and 3.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21650 |
| Provisional designation | 1999 OB1 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.14 |
| Orbital period | 3.49 years |
| Semi-major axis | 2.30 au |
| Perihelion – aphelion | 2.02 – 2.58 au |
| Eccentricity | 0.123 |
| Inclination | 6.08° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Bruno
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- (132668) Brunobozzetto
- (199900) Brunoganz
- (248321) Cester
- (352860) Monflier
All asteroids named after someone called Bruno