1091 Spiraea
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| Discovery A | |
|---|---|
| Discoverer | Karl Wilhelm Reinmuth |
| Discovery date | February 26, 1928 |
| Alternate designations B |
1928 DT |
| Category | Main belt (Cybele) |
| Orbital elements C | |
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| Eccentricity (e) | 0.0483983 |
| Semi-major axis (a) | |
| Perihelion (q) | 3.2609316 AU |
| Aphelion (Q) | |
| Orbital period (P) | |
| Mean orbital speed | |
| Inclination (i) | 1.1596171° |
| Longitude of the ascending node (Ω) |
80.3616426° |
| Argument of perihelion (ω) |
21.0099365° |
| Mean anomaly (M) | |
| Physical characteristics D | |
| Dimensions | 36 km |
| Mass | |
| Density | |
| Surface gravity | |
| Escape velocity | |
| Rotation period | |
| Spectral class | |
| Absolute magnitude | 10.60 |
| Albedo (geometric) | 0.15 |
| Mean surface temperature |
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1091 Spiraea is a minor planet orbiting the Sun. Initially it received the designation 1928 DT. The numerical designation indicates this was the 1091st asteroid discovered.
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