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Main-belt asteroid From Wikipedia, the free encyclopedia
1982 Cline, provisional designation 1975 VA, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 4 November 1975, by American astronomer Eleanor Helin at Palomar Observatory in California, and named after Edwin Lee Cline, inventor and friend of the discoverer.[2][10]
Discovery[1] | |
---|---|
Discovered by | E. F. Helin |
Discovery site | Palomar Obs. |
Discovery date | 4 November 1975 |
Designations | |
(1982) Cline | |
Named after | Edwin Cline (inventor)[2] |
1975 VA · 1936 OO 1957 LN · 1961 XC 1961 XK · 1973 AS | |
main-belt · (inner)[3] | |
Orbital characteristics[1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 59.91 yr (21,882 days) |
Aphelion | 2.8858 AU |
Perihelion | 1.7351 AU |
2.3104 AU | |
Eccentricity | 0.2490 |
3.51 yr (1,283 days) | |
18.924° | |
0° 16m 50.16s / day | |
Inclination | 6.8421° |
42.366° | |
279.57° | |
Physical characteristics | |
Dimensions | 6.03±0.17 km[4] 7.21±0.50 km[5] 8.100±0.030 km[1][6] 8.18 km (calculated)[3] 8.401±0.064 km[7] |
5.78±0.01 h[8] | |
0.194±0.028[1][6] 0.20 (assumed)[3] 0.2364±0.0443[7] 0.340±0.050[5] 0.369±0.063[4] | |
S[3][9] | |
12.5[5][7] · 12.56±0.39[9] · 12.8[3][4] · 12.9[1] | |
Cline is a stony S-type asteroid that orbits the Sun in the inner main-belt at a distance of 1.7–2.9 AU once every 3 years and 6 months (1,283 days). Its orbit has an eccentricity of 0.25 and an inclination of 7° with respect to the ecliptic.[1] As a main-belt asteroid with a perihelion of less than 1.74 AU, it is not far from being a Mars-crosser (1.67 AU).[1] The first precovery was taken at Johannesburg Observatory (Hartbeespoort, 076) in 1957, extending the asteroid's observation arc by 18 years prior to its discovery.[10]
The body's first and only rotational lightcurve of Cline was obtained by American astronomer James W. Birnsfield at the Via Capote Observatory (G69), California, in November 2011. It gave a well-defined rotation period of 5.78±0.01 hours with a brightness variation of 0.36 in magnitude (U=3).[8]
According to the survey carried out by the Japanese Akari satellite and the latest data from the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cline measures 7.2 and 8.1 kilometers in diameter and its surface has an albedo of 0.194 of 0.34, respectively.[5][6] Previous results by WISE/NEOWISE also gave a diameter of 6.03 and 8.4 kilometers.[4][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.18 kilometers with an absolute magnitude of 12.8.[3]
This minor planet was named in memory of Edwin Lee Cline, a friend of the discoverer and a known inventor in the automotive field who "looked to space as the new frontier".[2] The official naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4158).[11]
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