1983 Bok
1983 Bok (prov. designation: 1975 LB) is a dark background asteroid from the central region of the asteroid belt. 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, and named for Bart Bok and Priscilla Fairfield Bok. The carbonaceous C-type asteroid has a rotation period of 10.7 hours and measures approximately 15 kilometers (9.3 miles) in diameter.
Modelled shape of Bok from its lightcurve | |
| 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 |
Alternative designations | 1975 LB · 1950 RV 1963 UJ |
Minor planet category | main-belt · (middle) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.73 yr (24,372 days) |
| Aphelion | 2.8796 AU |
| Perihelion | 2.3632 AU |
Semi-major axis | 2.6214 AU |
| Eccentricity | 0.0985 |
Orbital period (sidereal) | 4.24 yr (1,550 days) |
Mean anomaly | 260.33° |
Mean motion | 0° 13m 55.92s / day |
| Inclination | 9.4133° |
Longitude of ascending node | 23.557° |
| 346.78° | |
| Physical characteristics | |
Mean diameter | 10.08 km (calculated) 15±3 km 15.70±0.24 km |
Synodic rotation period | 10.70±0.01 h |
| 0.034±0.015 0.06±0.02 0.10 (assumed) | |
| C · S/C | |
| 12.83±0.10 · 13.1 · 13.10±0.22 · 13.32 | |
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