(8993) Ingstad
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Asteroid (8993) Ingstad |
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| The position of (8993) Ingstad on November 5th, 2009 | |
| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt asteroid |
| Major semi-axis | 2.3840 AU |
| eccentricity | 0.2080 |
| Perihelion - aphelion | 1.8881 AU - 2.8799 AU |
| Inclination of the orbit plane | 23.0356 ° |
| Length of the ascending node | 151.0016 ° |
| Argument of the periapsis | 209.4789 ° |
| Time of passage of the perihelion | July 25, 2017 |
| Sidereal period | 3.68 a |
| Mean orbital velocity | 19.29 km / s |
| Physical Properties | |
| Medium diameter | 7.051 km (± 0.227) |
| Albedo | 0.170 (± 0.037) |
| Rotation period | 3.0276 h (± 0.0007) |
| Absolute brightness | 13.5 likes |
| history | |
| Explorer | Richard Martin West |
| Date of discovery | October 30, 1980 |
| Another name | 1980 UL , 1991 PL 1 |
| 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. | |
(8993) Ingstad is an asteroid of the main inner belt discovered by the Danish astronomer Richard Martin West on October 30, 1980 at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809).
Mean distance from the Sun ( major semi-axis ), eccentricity and inclination of the orbit plane of the asteroid roughly correspond to the Phocaea family, a group of asteroids named after (25) Phocaea . The solar orbit of (8993) Ingstad is strongly inclined at more than 23 ° compared to the ecliptic of the solar system , which is characteristic of Phocaea asteroids.
(8993) Ingstad was named on June 24, 2002 after the Norwegian archaeologist and adventurer Helge Ingstad (1899-2001). The naming was based on suggestions from a competition that the radio show Nitimen of the Norwegian radio station NRK P1 held in cooperation with the Astrofestival 2001.
Web links
- (8993) Ingstad in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8993) Ingstad in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances by (8993) Ingstad according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ Nitime asteroid "døpt" . Article by astrophysicist Knut Jørgen Røed Ødegaard and moderator Olav Viksmo Slettan from September 19, 2002 on the Norwegian radio website ( Norsk rikskringkasting )