790 Pretoria
| Discovery | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg |
| Discovery date | 16 January 1912 |
| Designations | |
| MPC designation | (790) Pretoria |
| 1912 NW | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.04 yr (33619 d) |
| Aphelion | 3.9279 AU (587.61 Gm) |
| Perihelion | 2.8955 AU (433.16 Gm) |
| 3.4117 AU (510.38 Gm) | |
| Eccentricity | 0.15130 |
| 6.30 yr (2301.7 d) | |
| 87.1149° | |
| 0° 9m 23.04s / day | |
| Inclination | 20.526° |
| 252.032° | |
| 38.637° | |
| Earth MOID | 1.90654 AU (285.214 Gm) |
| Jupiter MOID | 1.26807 AU (189.701 Gm) |
| Jupiter Tisserand parameter | 3.024 |
| Physical characteristics | |
|
Mean radius
|
85.185±1.3 km 80.49 ± 5.58 km |
| Mass | (4.58 ± 0.28) × 1018 kg |
|
Mean density
|
2.09 ± 0.45 g/cm3 |
| 10.37 h (0.432 d) | |
| 0.0384±0.001 | |
| 8.00 | |
790 Pretoria is a minor planet orbiting the Sun that was discovered by English astronomer Harry Edwin Wood on January 16, 1912. It is a member of the Cybele group located beyond the core of the main belt (see Minor planet groups).
10µ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 175 km. In the present day it is estimated to be 170 km (106 mi) in diameter.Photometric measurements of the asteroid made in 2005 at the Palmer Divide Observatory showed a light curve with a period of 10.370 ± 0.002 hours and a brightness variation of 0.08 ± 0.03 in magnitude.
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