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657 Gunlöd is a dark background asteroid orbiting in the intermediate asteroid belt, approximately 43 kilometres (27 mi) in diameter. It was discovered on 23 January 1908, by astronomer August Kopff at the Heidelberg Observatory in southwest Germany. It has an albedo of around 0.042 and a rotation period of 15.7 hours.[2][3]
| Discovery | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 23 January 1908 |
| Designations | |
| (657) Gunlöd | |
| 1908 BV; 1927 SC; 1929 AM; 1936 YJ | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.90 yr (39412 d) |
| Aphelion | 2.9049 AU (434.57 Gm) |
| Perihelion | 2.3187 AU (346.87 Gm) |
| 2.6118 AU (390.72 Gm) | |
| Eccentricity | 0.11223 |
| 4.22 yr (1541.7 d) | |
| 207.017° | |
| 0° 14m 0.636s / day | |
| Inclination | 10.228° |
| 297.595° | |
| 245.225° | |
| Physical characteristics | |
| 21.26±0.7 km | |
| 15.6652 h (0.65272 d) | |
| 0.0415±0.003 | |
| 10.93 | |
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