1983 Bok
| Discovery | |
|---|---|
| Discovered by | E. Roemer |
| Discovery site | Catalina Stn. |
| Discovery date | 9 June 1975 |
| Designations | |
| MPC designation | 1983 Bok |
|
Named after
|
Bart Bok and Priscilla Fairfield Bok |
| 1975 LB · 1950 RV 1963 UJ |
|
| main-belt · (middle) | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 65.73 yr (24,008 days) |
| Aphelion | 2.8802 AU |
| Perihelion | 2.3651 AU |
| 2.6226 AU | |
| Eccentricity | 0.0982 |
| 4.25 yr (1,551 days) | |
| 214.14° | |
| 0° 13m 55.56s / day | |
| Inclination | 9.4136° |
| 23.559° | |
| 346.54° | |
| Physical characteristics | |
| Dimensions | 10.08 km (calculated) 15±3 km 15.70±0.24 km |
| 10.70±0.01 h | |
|
0.034±0.015 0.06±0.02 0.10 (assumed) |
|
| S · C | |
| 12.83±0.10 · 13.1 · 13.10±0.22 · 13.32 | |
1983 Bok, provisional designation 1975 LB, is a dark asteroid from the middle region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 9 June 1975, by American astronomer Elizabeth Roemer at the Catalina Station of the UA's Steward Observatory in Tucson, Arizona.
The presumed C-type asteroid is also classified as a S-type, despite its low albedo of less than 0.1. It orbits the Sun at a distance of 2.4–2.9 AU once every 4 years and 3 months (1,551 days). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. The first observation was taken at the Argentinian La Plata Astronomical Observatory in 1950, extending the asteroid's observation arc by 25 years prior to its discovery.
In October 2014, the first rotational light-curve for this body was obtained by Italian astronomer Giovanni Battitsa Casalnuovo at the Eurac Observatory (IAU code#C62) in Bolzano, Italy. It gave a well-defined rotation period of 10.70±0.01 hours with a relatively high brightness variation of 0.46 in magnitude (U=3-). The Italian astronomer also calculated an albedo of 0.06 for its surface and a diameter of 15±3 kilometers, in agreement with the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer which gave a diameter of 15.7 kilometers and an albedo of 0.034. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and consequently calculates a much smaller diameter of 10.08 kilometers.
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