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Discovery
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| Discovered by | Karl Wilhelm Reinmuth |
| Discovery date | February 26, 1928 |
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Designations
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| Named after | Spiraea |
| Alternate name(s) | 1928 DT |
| Minor planet category |
Main belt (Cybele) |
| Epoch JD 2445600.5 | |
| Perihelion | 3.2609316 AU |
| Eccentricity | 0.0483983 |
| Inclination | 1.1596171° |
| Longitude of ascending node | 80.3616426° |
| Argument of perihelion | 21.0099365° |
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Physical characteristics
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| Dimensions | 36 km |
| Albedo | 0.15 |
| Absolute magnitude (H) | 10.60 |
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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