4324 Bickel
| Discovery | |
|---|---|
| Discovered by | L. G. Taff |
| Discovery site | Lincoln Laboratory ETS |
| Discovery date | 24 December 1981 |
| Designations | |
| MPC designation | (4324) Bickel |
|
Named after
|
Wolf Bickel (amateur astronomer) |
|
1981 YA1 · 1932 UD 1932 WE · 1948 SD 1948 TK2 · 1964 PE 1966 DC · 1972 NF 1973 YR3 · 1985 XX A924 YC |
|
| main-belt · (middle) | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 91.46 yr (33,404 days) |
| Aphelion | 3.0531 AU |
| Perihelion | 2.0371 AU |
| 2.5451 AU | |
| Eccentricity | 0.1996 |
| 4.06 yr (1,483 days) | |
| 271.91° | |
| 0° 14m 33.72s / day | |
| Inclination | 7.7767° |
| 292.79° | |
| 108.75° | |
| Physical characteristics | |
| Dimensions |
11.65±0.56 km 12.39 km (calculated) |
|
16 h 26.5 h 26.592±0.003 h |
|
| 0.20 (assumed) 0.248±0.020 |
|
| S | |
| 11.80 · 11.9 · 12.37±0.29 | |
4324 Bickel, provisional designation 1981 YA1, is a stony asteroid from the middle region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 24 December 1981, by American astronomer Laurence Taff at Lincoln Laboratory's Experimental Test Site, Socorro, in the U.S. state of New Mexico.
The S-type asteroid orbits the Sun at a distance of 2.0–3.1 AU once every 4 years and 1 month (1,483 days). Its orbit has an eccentricity of 0.20 and an inclination of 8° with respect to the ecliptic. The first precovery was taken at Heidelberg Observatory in 1924, extending the asteroid's observation arc by 57 years prior to its discovery.
In September 2001, the first ever conducted photometric observation of this asteroid at the Rozhen Observatory, Bulgaria, rendered a rotational light-curve with a longer-than-average period of 26.5 hours and a brightness variation of 0.63 in magnitude (U=2). A more refined light-curve was obtained in October 2005, by astronomers Raymond Poncy, Laurent Bernasconi and Rui Goncalves, which gave a period of 26.592±0.003 hours with an amplitude of 0.72 in magnitude (U=3).
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