1663 van den Bos
| Discovery | |
|---|---|
| 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) |
| 1926 PE · 1928 DD 1936 OM · 1948 BE 1948 EG1 · 1949 KE 1950 XD · 1963 SC |
|
| main-belt · Flora | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.47 yr (32,312 days) |
| Aphelion | 2.6432 AU |
| Perihelion | 1.8357 AU |
| 2.2394 AU | |
| Eccentricity | 0.1803 |
| 3.35 yr (1,224 days) | |
| 334.30° | |
| 0° 17m 38.76s / day | |
| Inclination | 5.3617° |
| 83.199° | |
| 275.26° | |
| Physical characteristics | |
| Dimensions |
7.58±0.67 km 11.697±0.048 km 12.25 km (derived) 13.537±0.339 km |
|
155±5 h (wrong) 740±10 h |
|
|
0.1708±0.0178 0.184±0.025 0.2045 (derived) 0.255±0.022 0.406±0.074 |
|
| S | |
| 11.80 · 11.86±0.28 · 11.9 · 12.2 | |
1663 van den Bos, provisional designation 1926 PE, is a stony Florian asteroid and an exceptionally slow rotator from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 4 August 1926, by English astronomer Harry Edwin Wood at Johannesburg Observatory in South Africa.
The S-type 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 (1,224 days). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic. In March 2082, van den Bos will pass 29 Amphitrite at a distance of 0.0065 AU (972,000 km). The body's observation arc begins with a post-recovery observation taken at Johannesburg in 1936, when it was also identified as 1936 OM, which is a full decade after its official discovery observation from 1926.
In October 2010, a rotational light-curve of van den Bos was obtained from photometric observations by astronomers Robert Stephens and David Higgins. It gave a rotation period of 740 hours with a brightness variation of 0.80 magnitude (U=3-). It is one of the slowest rotating minor planets (see list) and a suspected tumbler, that has an non-principal axis rotation. At the same time, photometric observations at the Shadowbox Observatory gave an alternative, yet ambiguous period of 155 hours with an amplitude of 0.5 magnitude (U=1).
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