(321453) Alexmarieann Main-belt Asteroid
Discovered on 10 September 2009 by Busch, M., Kresken, R. at ESA OGS.
Named after the grandson Aleksandr (b. 1987) and two granddaughters Mariia (b. 1987) and Anna (b. 1985) of astronomer Klim Churyumov, co-discoverer of comet 67P, the main target of the Rosetta spacecraft.Naming citation (MPC batch dated 2015-12-25), IAU / Minor Planet Center, via NASA/JPL
Where Alexmarieann is today
Seen from above the solar system on 2026-10-14: Alexmarieann is 2.47 au from the Sun and 1.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 321453 |
| Provisional designation | 2009 RM2 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.33 |
| Orbital period | 5.70 years |
| Semi-major axis | 3.19 au |
| Perihelion – aphelion | 2.33 – 4.05 au |
| Eccentricity | 0.268 |
| Inclination | 29.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.37 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 10 September 2009
- (225254) Flury
- (231609) Sarcander
- (251621) Luthen
- (321480) Juanluiscano
- (325476) Carlomarchioro
- (379173) Gamaovalia
- (438881) Michaelkhan
- (457818) Ramirezmoreta
- (726023) Berenyrobert