| Discovery[1] | |
|---|---|
| Discovered by | H. Gessner |
| Discovery site | Sonneberg Obs. |
| Discovery date | 4 December 1953 |
| Designations | |
| (3642) Frieden | |
Named after | Pax(goddess)[2] |
| 1953 XL1 · 1936 FU 1945 BD · 1950 FK 1959 CB1 · 1959 EB1 1978 GB3 · 1982 BK8 A908 ED | |
| main-belt · (middle) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.03 yr (29,595 days) |
| Aphelion | 3.0142AU |
| Perihelion | 2.5600 AU |
| 2.7871 AU | |
| Eccentricity | 0.0815 |
| 4.65yr (1,700 days) | |
| 202.73° | |
| 0° 12m 42.48s / day | |
| Inclination | 13.472° |
| 131.30° | |
| 14.702° | |
| Physical characteristics | |
| Dimensions | 31.899±0.126 km[3] 34.168±0.310 km[4] 35.11±1.1 km[5] 35.12 km(derived)[6] 36.04±0.55 km[7] |
| 14.491±0.003h[8] | |
| 0.046±0.002[7] 0.0474(derived)[6] 0.0475±0.003[5] 0.0602±0.0202[4] 0.071±0.007[3] | |
| SMASS =C[1] · C[6] | |
| 10.73±0.50[9] · 11.0[4] · 11.2[1][5][6][7] | |
3642 Frieden, provisional designation1953 XL1, is a carbonaceousasteroid from the middle region of theasteroid belt, approximately 35 kilometers in diameter. It was discovered by German astronomerHerta Gessner atSonneberg Observatory on 4 December 1953.[10] It is named after the goddess of peace,Pax.[2]
Frieden orbits the Sun in thecentral main-belt at a distance of 2.6–3.0 AU once every 4 years and 8 months (1,700 days). Its orbit has aneccentricity of 0.08 and aninclination of 13° with respect to theecliptic.[1] The body was first identified as "1908 ED" at the U.S Taunton Observatory (803) in 1908, while its first used observation was made at the BelgianUccle Observatory 1936, extending the asteroid'sobservation arc by 17 years prior to its official discovery.[10]
In theSMASS classification,Frieden is a carbonaceousC-type asteroid.[1]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Frieden measures between 31.9 and 36.0 kilometers in diameter and its surface has analbedo between 0.046 and 0.071.[3][4][5][7] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.047 and a diameter of 35.1 kilometers, based on an absolutemagnitude of 11.2.[6] Between 2019 and 2021, 3642 Frieden has been observed tooccult four stars.
In April 2006, a rotationallightcurve ofFrieden was obtained from photometric observations by American astronomerBrian Warner at his Palmer Divide Observatory (716), Colorado. It gave a well-definedrotation period of14.491±0.003 hours with a brightness variation of0.13±0.02 magnitude (U=3).[8]
Thisminor planet was named after the German translation of the goddessPax in the hope for peace (German:Frieden) around the world.[2] The official naming citation was published by theMinor Planet Center on 2 February 1988 (M.P.C. 12808).[11]
