Astronomy:657 Gunlöd

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657 Gunlöd
Discovery
Discovered byA. Kopff
Discovery siteHeidelberg Obs.
Discovery date23 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 arc107.90 yr (39412 d)
|{{{apsis}}}|helion}}2.9049 astronomical unit|AU (434.57 Gm)
|{{{apsis}}}|helion}}2.3187 AU (346.87 Gm)
2.6118 AU (390.72 Gm)
Eccentricity0.11223
Orbital period4.22 yr (1541.7 d)
Mean anomaly207.017°
Mean motion0° 14m 0.636s / day
Inclination10.228°
Longitude of ascending node297.595°
245.225°
Physical characteristics
Mean radius21.26±0.7 km
Rotation period15.6652 h (0.65272 d)
Geometric albedo0.0415±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.[2][3]

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