| 词条 | 657 Gunlöd |
| 释义 |
| minorplanet= yes | background= #D6D6D6 | name= 657 Gunlöd | mpc_name= (657) Gunlöd | alt_names= 1908 BV; 1927 SC; 1929 AM; 1936 YJ | discoverer= A. Kopff | discovered= 23 January 1908 | discovery_site= Heidelberg Obs. | epoch= 31 July 2016 (JD 2457600.5) | eccentricity= 0.11223 | semimajor= {{Convert|2.6118|AU|Gm|abbr=on}} | perihelion= {{Convert|2.3187|AU|Gm|abbr=on}} | aphelion= {{Convert|2.9049|AU|Gm|abbr=on|lk=on}} | period= 4.22 yr (1541.7 d) | inclination= 10.229° | asc_node= 297.595° | arg_peri= 245.225° | mean_anomaly= 207.017° | mean_motion= {{Deg2DMS|0.23351|sup=ms}} / day | orbit_ref= [1] | observation_arc= 107.90 yr (39412 d) | uncertainty= 0 | abs_magnitude= 10.93 | rotation= {{Convert|15.6652|h|d|abbr=on|lk=on}} | albedo= {{val|0.0415|0.003}} | mean_radius= {{val|21.26|0.7}} km }}657 Gunlöd is a dark background asteroid orbiting in the intermediate asteroid belt, approximately {{convert|43|km|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.[3] References1. ^{{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=657;cad=1 |title=657 Gunlod (1908 BV) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=2016-05-05 |df=dmy-all}} [2]2. ^1 {{cite web|url=http://www.psi.edu/pds/archive/lc.html |title=PDS lightcurve data |deadurl=yes |archiveurl=https://archive.is/20060614093519/http://www.psi.edu/pds/archive/lc.html |archivedate=2006-06-14 |df=dmy-all}} }} External links
5 : Background asteroids|Discoveries by August Kopff|Minor planets named from Norse mythology|Named minor planets|Astronomical objects discovered in 1908 |
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