(167) Urda
|
Asteroid (167) |
|
|---|---|
.png)
|
|
| A three-dimensional model of (167) Urda based on its light curve | |
| Properties of the orbit ( animation ) | |
| Orbit type | Outer main belt |
| Asteroid family | Koronis family |
| Major semi-axis | 2,852 AU |
| eccentricity | 0.033 |
| Perihelion - aphelion | 2.757 AU - 2.947 AU |
| Inclination of the orbit plane | 2.2 ° |
| Length of the ascending node | 166.4 ° |
| Argument of the periapsis | 128.1 ° |
| Time of passage of the perihelion | March 11, 2011 |
| Sidereal period | 4 a 298 d |
| Mean orbital velocity | 17.6 km / s |
| Physical Properties | |
| Medium diameter | 40 km |
| Albedo | 0.2230 |
| Rotation period | 13 h 4 min |
| Absolute brightness | 9.24 likes |
| Spectral class | S. |
| history | |
| Explorer | CHF Peters |
| Date of discovery | August 28, 1876 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(167) Urda is an asteroid of the main belt that was discovered on August 28, 1876 by the German-American astronomer Christian Heinrich Friedrich Peters .
The asteroid was named after Urd , one of the Norns from Norse mythology .
In 1905 the Austrian astronomer Johann Palisa discovered that the asteroid changes in brightness.
Photometric observations of this asteroid in 2007 and 2008 at the Palmer Divide Observatory in Colorado Springs, Colorado showed a light curve with a period of 13.06133 ± 0.00002 hours. This S asteroid is a member of the Koronis family of asteroids that share similar orbital elements.
In 2002, from the observations of the midcourse space experiment, an estimate of the diameter of 37.93 ± 3.17 km with an albedo of 0.2523 ± 0.0448 was obtained.
An occultation by (167) Urda was observed from Japan on July 23, the 2,001th
See also
Web links
- Lightcurve plot of 167 Urda , Palmer Divide Observatory, BD Warner (2007)
- Asteroid Lightcurve Database (LCDB) , query form ( info )
- 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
Individual evidence
- ↑ James D. Maddrill: Variable Asteroid (167) Urda . In: Publications of the Astronomical Society of the Pacific . tape 17 , no. 105 , December 1905, p. 190–192 , doi : 10.1086 / 121648 , bibcode : 1905PASP ... 17..186. , JSTOR : 40691277 .
- ^ Brian D. Warner, Josef Durech, Michael Fauerbach, Scott Marks: Shape and Spin Models for Four Asteroids . In: The Minor Planet Bulletin . tape 35 , no. 4 , October 2008, p. 167–171 , bibcode : 2008MPBu ... 35..167W .
- ^ Patrick Moore, Robin Rees: Patrick Moore's Data Book of Astronomy . Ed .: Cambridge University Press . 2nd Edition. 2011, p. 164–165 ( limited preview in Google Book search).
- ^ Edward F. Tedesco, Michael P. Egan, Stephan D. Price: The Midcourse Space Experiment Infrared Minor Planet Survey . In: The Astronomical Journal . tape 124 , no. 124 , July 2002, p. 583-591 , doi : 10.1086 / 340960 , bibcode : 2002AJ .... 124..583T .
- ↑ Observed Minor Planet Occultation Events. In: Asteroidal Occultations. Retrieved October 14, 2018 (Occ'n No. 281).