1660 Wood
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From Wikipedia, the free encyclopedia
1660 Wood, provisional designation 1953 GA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was named after BritishâSouth African astronomer Harry Edwin Wood.
| Discovery[1] | |
|---|---|
| Discovered by | J. A. Bruwer |
| Discovery site | Johannesburg Obs. |
| Discovery date | 7 April 1953 |
| Designations | |
| (1660) Wood | |
Named after | Harry Edwin Wood (astronomer)[2] |
| 1953 GA · 1931 KL 1933 YC · 1951 RD1 1955 VQ | |
| main-belt · Phocaea[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.05 yr (31,429 days) |
| Aphelion | 3.1172 AU |
| Perihelion | 1.6726 AU |
| 2.3949 AU | |
| Eccentricity | 0.3016 |
| 3.71 yr (1,354 days) | |
| 182.68° | |
| 0° 15m 57.24s / day | |
| Inclination | 20.575° |
| 212.94° | |
| 276.66° | |
| Physical characteristics | |
| Dimensions | 11.342±0.113 km[5][6] 12.67 km (calculated)[3] |
| 6.8088±0.0002 h[7] 6.8088±0.0004 h[8] 6.8090±0.0002 h[9] | |
| 0.23 (assumed)[3] 0.239±0.035[5][6] | |
| SMASS = S[1] · S[3] | |
| 11.32±0.67[10] · 11.7[1][3] · 11.9[5] | |
Discovery
Wood was discovered on 7 April 1953, by South African astronomer Jacobus Bruwer at Johannesburg Observatory in South Africa.[11] It was the second numbered discovery made by Bruwer. He also discovered the minor planets 1658 Innes, 1794 Finsen, and 3284 Niebuhr. The asteroid 1811 Bruwer was named in his honour by the Dutch, Dutch-American astronomer trio of the PalomarâLeiden survey.[12]
Orbit and classification
Wood is a S-type asteroid and member of the Phocaea family (701).[4] It orbits the Sun in the inner main-belt at a distance of 1.7â3.1 AU once every 3 years and 9 months (1,354 days). Its orbit has an eccentricity of 0.30 and an inclination of 21° with respect to the ecliptic.[1] It was first identified as 1931 KL at Lowell Observatory in 1931, extending the body's observation arc by 22 years prior to its official discovery observation.[11]
Physical characteristics
Rotation period
From January to March 2012, four rotational lightcurves of Wood were obtained from photometric observations taken by astronomers Julian Oey, Kevin Hills, and Xianming Han. Lightcurve analysis gave a concurring rotation period of 6.809 hours with a brightness variation between of 0.14 and 0.26 magnitude (U=3/3/3/2+).[7][8][9]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Wood measures 11.34 kilometers in diameter, and its surface has an albedo of 0.239.[5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23 and calculates a diameter of 12.67 kilometers with an absolute magnitude of 11.7.[3]
Naming
This minor planet was named for BritishâSouth African astronomer Harry Edwin Wood (1881â1946), who was the second director of the Union Observatory at which the asteroid was discovered, and who had discovered 12 asteroids himself between 1911 and 1928. He had the prime responsibility for the famous Franklin-Adams Star Camera (Franklin-Adams photographic refractor) since its acquisition in 1909 (also see 1925 Franklin-Adams).[2] The official naming citation was published by the Minor Planet Center on 1 July 1972 (M.P.C. 3297).[13]
