(1009) Sirene Mars-crossing Asteroid
Discovered on 31 October 1923 by K. Reinmuth at Heidelberg.
Where Sirene is today
Seen from above the solar system on 2026-10-14: Sirene is 2.57 au from the Sun and 3.45 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1009 |
| Provisional designation | A923 UE |
| Orbit class | Mars-crossing Asteroid |
| Rotation period | 2.88 hours |
| Absolute magnitude (H) | 14.16 |
| Orbital period | 4.26 years |
| Semi-major axis | 2.63 au |
| Perihelion – aphelion | 1.44 – 3.82 au |
| Eccentricity | 0.453 |
| Inclination | 15.7° |
| Closest distance between its orbit and Earth's (MOID) | 0.449 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 31 October 1923
More named asteroids discovered by K. Reinmuth
- (796) Sarita
- (799) Gudula
- (864) Aase
- (909) Ulla
- (910) Anneliese
- (911) Agamemnon
- (913) Otila
- (918) Itha
- (920) Rogeria
- (921) Jovita
- (922) Schlutia
- (923) Herluga
← (1008) La Paz · (1010) Marlene →