| Discovery | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg Observatory |
| Discovery date | 16 January 1912 |
| Designations | |
| (790) Pretoria | |
| Pronunciation | /prɪˈtɔːriə/[1] |
| 1912 NW | |
| Orbital characteristics[2] | |
| 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° | |
| Physical characteristics | |
| 85.185±1.3 km[2] 80.49 ± 5.58 km[3] | |
| Mass | (4.58 ± 0.28) × 1018 kg[3] |
Mean density | 2.09 ± 0.45 g/cm3[3] |
| 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[4] (see Minor planet groups) and named after Pretoria, the capital city of South Africa.
10μ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 175 km.[5] In the present day it is estimated to be 170 km (106 mi) in diameter.[2] 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.[6]
790 Pretoria has been observed to occult 15 stars between 1998 and 2023.
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