(1091) Spiraea Outer Main-belt Asteroid
Discovered on 26 February 1928 by K. Reinmuth at Heidelberg.
Where Spiraea is today
Seen from above the solar system on 2026-10-14: Spiraea is 3.44 au from the Sun and 2.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1091 |
| Provisional designation | 1928 DT |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 35.2 km (#1,146 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0910 |
| Rotation period | 7.01 hours |
| Absolute magnitude (H) | 10.97 |
| Orbital period | 6.32 years |
| Semi-major axis | 3.42 au |
| Perihelion – aphelion | 3.18 – 3.66 au |
| Eccentricity | 0.0710 |
| Inclination | 1.15° |
| Closest distance between its orbit and Earth's (MOID) | 2.19 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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
← (1090) Sumida · (1092) Lilium →