(2976) Lautaro
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Asteroid (2976) Lautaro |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Major semi-axis | 3.3401 AU |
| eccentricity | 0.1441 |
| Perihelion - aphelion | 2.8597 AU - 3.8223 AU |
| Inclination of the orbit plane | 9.8096 ° |
| Length of the ascending node | 206.9845 ° |
| Argument of the periapsis | 183.1531 ° |
| Sidereal period | 6.11 a |
| Mean orbital velocity | 16.29 km / s |
| Physical Properties | |
| Medium diameter | 38.42 (± 2.3) km |
| Albedo | 0.0522 (± 0.007) |
| Rotation period | 17.41 (± 0.08) h |
| Absolute brightness | 10.7 mag |
| history | |
| Explorer | Carlos Torres |
| Date of discovery | April 22, 1974 |
| Another name | 1974 HR , A903 UG, 1953 XA, 1957 NB, 1965 XA, 1972 YP 1 , 1977 VV, 1983 TR |
| 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. | |
(2976) Lautaro is an asteroid of the main outer belt , which was discovered by the Chilean astronomer Carlos Torres on April 22, 1974 at the Observatorio Cerro El Roble ( IAU code 805). There had already been several unconfirmed sightings of the asteroid: on October 27, 1903 with the provisional designation A903 UG at the State Observatory Heidelberg-Königstuhl , on December 2, 1953 (1953 XA) at the Royal Observatory of Belgium in Uccle , on December 2, 1953 (1953 XA) at the Royal Observatory of Belgium in Uccle . July 1957 (1957 NB) at the Argentine Observatorio Astronómico de La Plata , on December 1, 1965 (1965 XA) at the Goethe Link Observatory in Indiana and on December 30, 1972 (1972 YP 1 ) at the Crimean Observatory in Nautschnyj .
The asteroid belongs to the Cybele Group, a dynamic group of asteroids beyond the Hecuba Gap . The members' orbits are in 7: 4 resonance with the planet Jupiter , which stabilizes them. The group was named after the asteroid (65) Cybele . (2976) Lautaro has a dark surface with an albedo of 0.0522 (± 0.007) and a mean diameter of 38.42 (± 2.3) kilometers.
The asteroid spins around itself in 17.41 (± 0.08) hours and thus has a slow rotation speed. The light curve analysis to determine the period of rotation was performed September 1-3, 2007 at the Oakley Observatory in Terre Haute , Indiana with a 35 cm Celestron telescope.
(2976) Lautaro was named on March 26, 1986 after Lautaro (in Mapudungun Leftaru ), a war chief ( Toqui ) of the Mapuche in the Arauco War in Chile from the 16th century.
Web links
- (2976) Lautaro in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2976) Lautaro in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances by (2976) Lautaro according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (2976) Lautaro at the IAU Minor Planet Center (English)
- ↑ Toshihiro Kasuga, Fumihiko Usui, Sunao Hasegawa, Daisuke Kuroda, Takafumi Ootsubo, Thomas G. Müller, Masateru Ishiguro: Table of the Cybele asteroids , created as part of the Akari survey (English)
- ^ Heath Shipley, Alex Dillard, Jordan Kendall, Matthew Reichert, Jason Sauppe, Nelson Shaffer, Thomas Kleeman, Richard Ditteon: Asteroid Lightcurve Analysis at the Oakley Observatory - September 2007 . The Minor Planet Bulletin 35.3, July to September 2008, page 99f ( PDF , English)