1960 Guisan
Carbonaceous main-belt asteroid
From Wikipedia, the free encyclopedia
1960 Guisan, provisional designation 1973 UA, is a carbonaceous asteroid from the middle region of the asteroid belt, approximately 25 kilometers in diameter.
| Discovery[1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 25 October 1973 |
| Designations | |
Named after | Henri Guisan (General)[2] |
| 1973 UA · 1961 VC1 1969 UR2 | |
| main-belt · (middle)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 61.49 yr (22,461 days) |
| Aphelion | 2.8352 AU |
| Perihelion | 2.2185 AU |
| 2.5268 AU | |
| Eccentricity | 0.1220 |
| 4.02 yr (1,467 days) | |
| 74.212° | |
| 0° 14m 43.44s / day | |
| Inclination | 8.4737° |
| 22.213° | |
| 263.99° | |
| Physical characteristics | |
| Dimensions | 24.55±1.2 km (IRAS:5)[4] 24.65±0.28 km[5] 27.004±0.176 km[6] 27.23±0.57 km[7] 28.411±0.105 km[8] |
| 8.46 h[9] | |
| 0.0370±0.0050[8] 0.041±0.003[7][6] 0.049±0.011[5] 0.0496±0.005 (IRAS:5)[4] | |
| C[3] B–V = 0.720[1] U–B = 0.290[1] | |
| 11.93[1][3][7][8][5][9] · 11.93 (IRAS:5)[4] | |
It was discovered on 25 October 1973, by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and named after Swiss General Henri Guisan.[2][10]
Orbit and classification
Guisan orbits the Sun in the central main-belt at a distance of 2.2–2.8 AU once every 4.02 years (1,467 days). Its orbit has an eccentricity of 0.12 and an inclination of 8° with respect to the ecliptic.[1]
Physical characteristics
Guisan has been characterized as a dark C-type asteroid.[3]
It has a rotation period of 8.46 hours[9] and a geometric albedo of 0.04–0.05, as measured by the IRAS, Akari, WISE and NEOWISE surveys.[4][5][7][8]
Naming
This minor planet was named in memory of Henri Guisan (1874–1960), general of the Swiss army during the Second World War. He was notably from the country's smaller Swiss-French part rather than from the German-speaking part.[2] The official naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4157).[11]
