1663 van den Bos
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. It was later named after astronomer Willem Hendrik van den Bos.
van den Bos modeled from its lightcurve | |
| 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) |
Alternative designations | 1926 PE · 1928 DD 1936 OM · 1948 BE 1948 EG1 · 1949 KE 1950 XD · 1963 SC |
Minor planet category | main-belt · Flora |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.62 yr (32,370 days) |
| Aphelion | 2.6437 AU |
| Perihelion | 1.8357 AU |
Semi-major axis | 2.2397 AU |
| Eccentricity | 0.1804 |
Orbital period (sidereal) | 3.35 yr (1,224 days) |
Mean anomaly | 33.128° |
Mean motion | 0° 17m 38.76s / day |
| Inclination | 5.3617° |
Longitude of ascending node | 83.196° |
| 275.24° | |
| Physical characteristics | |
| Dimensions | 7.58±0.67 km 11.697±0.048 km 12.25 km (derived) 13.537±0.339 km |
Synodic rotation period | 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 | |
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