(251621) Luthen Main-belt Asteroid
Discovered on 10 September 2009 by Busch, M., Kresken, R. at ESA OGS.
Hartwig Lüthen (b. 1960), associate professor of plant physiology at the University of Hamburg, has been an amateur astronomer since childhood and an active lunar and planetary imager. He is the heart and soul of the Gesellschaft für volkstümliche Astronomie, Hamburg's amateur astronomy association.Naming citation (20120703/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Luthen is today
Seen from above the solar system on 2026-10-14: Luthen is 2.67 au from the Sun and 3.53 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 251621 |
| Provisional designation | 2009 RR2 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.89 |
| Orbital period | 3.87 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.13 – 2.80 au |
| Eccentricity | 0.135 |
| Inclination | 6.97° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 10 September 2009
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- (231609) Sarcander
- (321453) Alexmarieann
- (321480) Juanluiscano
- (325476) Carlomarchioro
- (379173) Gamaovalia
- (438881) Michaelkhan
- (457818) Ramirezmoreta
- (726023) Berenyrobert