4790 Petrpravec
4790 Petrpravec (prov. designation: 1988 PP) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 16 kilometers (10 miles) in diameter. It was discovered on 9 August 1988, by American astronomer Eleanor Helin at the Palomar Observatory in California, and later named for Czech astronomer Petr Pravec.
Shape model of Petrpravec from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | E. F. Helin |
| Discovery site | Palomar Obs. |
| Discovery date | 9 August 1988 |
| Designations | |
| (4790) Petrpravec | |
Named after | Petr Pravec (Czech astronomer) |
| 1988 PP · 1978 EA1 | |
| main-belt · (middle) background · Eunomia | |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 40.21 yr (14,685 d) |
| Aphelion | 2.8502 AU |
| Perihelion | 2.4002 AU |
| 2.6252 AU | |
| Eccentricity | 0.0857 |
| 4.25 yr (1,554 d) | |
| 80.278° | |
| 0° 13m 54.12s / day | |
| Inclination | 12.720° |
| 131.48° | |
| 84.770° | |
| Physical characteristics | |
Mean diameter | 14.40±4.13 km 14.53±1.05 km 16.16±4.77 km 16.217±0.096 km 17.160±5.818 km 17.62±1.5 km |
| undetermined | |
| 0.0336±0.0384 0.038±0.007 0.047±0.042 0.05±0.04 0.1084±0.021 0.160±0.024 | |
| C (Pan-STARRS) C (SDSS-MOC) | |
| 11.80 12.8 12.90 13.0 13.15 13.15±0.18 13.17 | |
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