790 Pretoria
From Infogalactic: the planetary knowledge core
| Discovery | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg |
| Discovery date | January 16, 1912 |
| Designations | |
| 1912 NW | |
| Orbital characteristics | |
| Epoch August 18, 2005 (JDCT 2453600.5) | |
| Aphelion | 3.923 AU |
| Perihelion | 2.896 AU |
| 3.409 AU | |
| Eccentricity | 0.151 |
| 6.296 a | |
| 179.112° | |
| Inclination | 20.549° |
| 252.173° | |
| 40.434° | |
| Physical characteristics | |
| Dimensions | 160.98 ±11.16[1] km |
| Mass | (4.58 ± 0.28) × 1018[1] kg |
|
Mean density
|
2.09 ± 0.45[1] g/cm3 |
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.[2] In the present day it is estimated to be 170 km (106 mi) in diameter.[3] 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.[4]
References
- ↑ 1.0 1.1 1.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> See Table 1.
- ↑ Morrison, D.; Chapman, C. R. (March 1976), "Radiometric diameters for an additional 22 asteroids", Astrophysical Journal, 204, pp. 934–939, Bibcode:2008mgm..conf.2594S, doi:10.1142/9789812834300_0469.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- ↑ "JPL Small-Body Database Browser: 790 Pretoria (1912 NW)" (2009-12-21 last obs). Retrieved 2010-09-05.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- ↑ Warner, Brian D. (2005), "Asteroid lightcurve analysis at the Palmer Divide Observatory - winter 2004-2005", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 32 (3), pp. 54–58, retrieved 2013-02-03.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
External links
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