astro.wikisort.org - Asteroid
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.
| Discovery | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg Observatory |
| Discovery date | 16 January 1912 |
| Designations | |
MPC designation | (790) Pretoria |
| Pronunciation | /prɪˈtɔːriə/[1] |
Alternative designations | 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) |
Semi-major axis | 3.4117 AU (510.38 Gm) |
| Eccentricity | 0.15130 |
Orbital period (sidereal) | 6.30 yr (2301.7 d) |
Mean anomaly | 87.1149° |
Mean motion | 0° 9m 23.04s / day |
| Inclination | 20.526° |
Longitude of ascending node | 252.032° |
Argument of perihelion | 38.637° |
| Physical characteristics | |
Mean radius | 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] |
Synodic rotation period | 10.37 h (0.432 d) |
Geometric albedo | 0.0384±0.001 |
Absolute magnitude (H) | 8.00 |
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]
Between 1998 and 2021, 790 Pretoria has been observed to occult twelve stars.
References
- "Pretoria". Dictionary.com Unabridged (Online). n.d.
- "JPL Small-Body Database Browser: 790 Pretoria (1912 NW)" (2009-12-21 last obs). Archived from the original on 10 June 2011. Retrieved 4 May 2016.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- De Prá, M. N.; et al. (September 2018), "PRIMASS visits Hilda and Cybele groups", Icarus, 311: 35–51, arXiv:1711.02071, Bibcode:2018Icar..311...35D, doi:10.1016/j.icarus.2017.11.012.
- Morrison, D.; Chapman, C. R. (March 1976), "Radiometric diameters for an additional 22 asteroids", Astrophysical Journal, vol. 204, pp. 934–939, Bibcode:2008mgm..conf.2594S, doi:10.1142/9789812834300_0469.
- Warner, Brian D. (2005), "Asteroid lightcurve analysis at the Palmer Divide Observatory - winter 2004-2005", The Minor Planet Bulletin, vol. 32, no. 3, pp. 54–58, Bibcode:2005MPBu...32...54W.
External links
- Lightcurve plot of 790 Pretoria, Palmer Divide Observatory, B. D. Warner (2009)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 790 Pretoria at AstDyS-2, Asteroids—Dynamic Site
- 790 Pretoria at the JPL Small-Body Database
 | This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
На других языках
[de] (790) Pretoria
(790) Pretoria ist ein Asteroid des Hauptgürtels, der am 16. Januar 1912 vom südafrikanischen Astronomen Harry Edwin Wood in Johannesburg entdeckt wurde.- [en] 790 Pretoria
[ru] (790) Претория
(790) Претория (англ. Pretoria) — крупный астероид Главного пояса, который был открыт 16 января 1912 года южно-африканским астрономом Гарри Вудом в обсерватории Йоханнесбурга и назван в честь столицы ЮАР города Претория[1].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
WikiSort.org - проект по пересортировке и дополнению контента Википедии