| Discovery | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 23 January 1908 |
| Designations | |
| MPC designation | (657) Gunlöd |
| Alternative designations | 1908 BV; 1927 SC; 1929 AM; 1936 YJ |
| Orbital characteristics | |
| 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) |
| Semi-major axis | 2.6118 AU (390.72 Gm) |
| Eccentricity | 0.11223 |
| Orbital period (sidereal) | 4.22 yr (1541.7 d) |
| Mean anomaly | 207.017° |
| Mean motion | 0° 14 0.636 / day |
| Inclination | 10.228° |
| Longitude of ascending node | 297.595° |
| Argument of perihelion | 245.225° |
| Physical characteristics | |
| Mean radius | 21.26±0.7 km |
| Synodic rotation period | 15.6652 h (0.65272 d) |
| Geometric albedo | 0.0415±0.003 |
| Absolute magnitude (H) | 10.93 |
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.
References
- "657 Gunlod (1908 BV)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
- "Supplemental IRAS Minor Planet Survey". Archived from the original on 23 June 2006.
- "PDS lightcurve data". Archived from the original on 14 June 2006.
External links
- 657 Gunlöd at AstDyS-2, Asteroids—Dynamic Site
- 657 Gunlöd at the JPL Small-Body Database
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