| Discovery[1] | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 27 September 1984 |
| Designations | |
| (4082) Swann | |
Named after | Gordon Swann (American geologist)[2] |
| 1984 SW3 · 1947 UF 1969 PE | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 69.54 yr (25,399 days) |
| Aphelion | 3.0076AU |
| Perihelion | 1.7721 AU |
| 2.3899 AU | |
| Eccentricity | 0.2585 |
| 3.69yr (1,349 days) | |
| 317.29° | |
| 0° 16m 0.48s / day | |
| Inclination | 9.5978° |
| 294.36° | |
| 100.28° | |
| Physical characteristics | |
| Dimensions | 5.85 km(derived)[3] 9.535±0.066 km[4] 11.06±0.29 km[5] |
| 4.03632±0.00009h[a] 4.1±0.1 h[6] | |
| 0.029±0.012[4] 0.101±0.006[5] 0.20(assumed)[3] | |
| SMASS = Ch[1] · C[3] | |
| 12.90[5] · 13.08±0.2(R)[a] · 13.4[1] · 13.46±0.206[3][7] · 13.58±0.27[8] · 14.55[4] | |
4082 Swann, provisional designation1984 SW3, is a carbonaceousasteroid from the inner regions of theasteroid belt, approximately 10 kilometers in diameter.
The asteroid was discovered on 27 September 1984, by American astronomerCarolyn Shoemaker atPalomar Observatory in California, United States, and later named for American geologistGordon Swann.[2][9]
Swann orbits the Sun in theinner main-belt at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,349 days). Its orbit has aneccentricity of 0.26 and aninclination of 10° with respect to theecliptic.[1] First identified as1947UF at the FinnishTurku Observatory in 1947,Swann'sobservation arc was extended by 37 years prior to its official discovery observation at Palomar.[9]
TheC-type asteroid is classified as a Ch-subtype in theSMASS taxonomy.[1]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Swann measures 9.5 and 11.1 kilometers in diameter and its surface has analbedo of 0.029 and 0.101, respectively.[4][5] TheCollaborative Asteroid Lightcurve Link, however, assumes a standard albedo for stony asteroids of 0.20 and derives a much smaller diameter of 5.85 kilometers, based on an absolutemagnitude of 13.46.[3]
In July 2006, a rotationallightcurve ofSwann was obtained from photometric observations byPetr Pravec at theOndřejov Observatory in the Czech Republic. It gave arotation period of4.03632±0.00009 hours with a brightness variation of 0.67 magnitude (U=3).[a] A second lightcurve obtained by Jean-Gabriel Bosch in September 2006, gave a period of4.1±0.1 hours and an amplitude of 0.35 magnitude (U=2).[6]
Thisminor planet was named after American geologistGordon A. Swann (born 1931). He served as the principal investigator of the "Apollo Lunar Geologic Experiment" conducted at the lunar landing sites ofApollo 14 andApollo 15.[2] The official naming citation was published by theMinor Planet Center on 12 December 1989 (M.P.C. 15576).[10]
