1663 van den Bos
| Discovery [1] | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg Obs. |
| Discovery date | 4 August 1926 |
| Designations | |
| MPC designation | 1663 van den Bos |
|
Named after
|
Willem van den Bos (astronomer)[2] |
| 1926 PE · 1928 DD 1936 OM · 1948 BE 1948 EG1 · 1949 KE 1950 XD · 1963 SC |
|
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.16 yr (31,835 days) |
| Aphelion | 2.6428 AU |
| Perihelion | 1.8381 AU |
| 2.2405 AU | |
| Eccentricity | 0.1795 |
| 3.35 yr (1,225 days) | |
| 157.94° | |
| Inclination | 5.3610° |
| 83.233° | |
| 275.14° | |
| Physical characteristics | |
| Dimensions | 12.13 km 7.58±0.67 km[4] 11.697±0.048 km[5] 13.54±0.34 km[6] 12.25 km (derived)[3] |
| 740 h[7][8] 155±5 h[9] |
|
| 0.1584 0.406±0.074[4] 0.1708±0.0178[5] 0.184±0.025[6] 0.2045 (derived)[3] |
|
| S [3] | |
| 11.9 | |
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1663 van den Bos, provisional designation 1926 PE, is a stony asteroid and an exceptionally slow rotator from the inner regions of the asteroid belt, about 12 kilometers in diameter. It was discovered on 4 August 1926 by English astronomer Harry Edwin Wood at Union Observatory in Johannesburg, South Africa.[10]
The asteroid is a member of the Flora family, a large group of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,225 days). Its orbit shows an eccentricity of 0.18 and is tilted by 5 degrees to the plane of the ecliptic. Repeated photometric light-curve observations in 2010, unveiled an outstandingly long rotation period of 740 hours for the asteroid.[7][8] An alternative period of 155±5 hours has also been measured in the same year.[9] A geometric albedo of about 0.16 was measured for the S-type asteroid by the Akari and WISE/NEOWISE mission.[4][5][6]
It was named in honor of Dutch-born, South African astronomer Willem Hendrik van den Bos (1896–1974), former director of the Union Observatory (1941–1956) and president of the Astronomical Society of South Africa (1943–1955). He made visual micrometric observations and discovered thousands of double stars.[2]
References
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<references />, or <references group="..." />External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1663 van den Bos at the JPL Small-Body Database
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