(2404) Antarctica
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Asteroid (2404) Antarctica |
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| The orbit of (2404) Antarctica | |
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Themis family |
| Major semi-axis | 3.1270 AU |
| eccentricity | 0.1351 |
| Perihelion - aphelion | 2.7044 AU - 3.5496 AU |
| Inclination of the orbit plane | 2.6901 ° |
| Length of the ascending node | 110.9261 ° |
| Argument of the periapsis | 146.1346 ° |
| Time of passage of the perihelion | 19th October 2017 |
| Sidereal period | 5.53 a |
| Mean orbital velocity | 16.85 km / s |
| Physical Properties | |
| Medium diameter | 23.209 km (± 0.316) |
| Albedo | 0.090 (± 0.014) |
| Absolute brightness | 11.8 mag |
| history | |
| Explorer | Antonin Mrkos |
| Date of discovery | October 1, 1980 |
| Another name | 1980 TE , 1933 BP, 1934 GQ, 1951 LN, 1969 TH 5 , 1976 WG |
| 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. | |
(2404) Antarctica is an asteroid of the main outer belt , which was discovered on October 1, 1980 by the Czech astronomer Antonín Mrkos at the Kleť Observatory ( IAU code 046) near Český Krumlov .
There had been unconfirmed sightings of the asteroid before: 1933 (1933 BP) and April 15, 1934 (1934 GQ) at the State Observatory in Heidelberg-Königstuhl , on June 7, 1951 (1951 LN) at the McDonald Observatory in Texas , in October 1969 (1969 TH 5 ) at the Crimean Observatory in Nautschnyj and on November 25, 1976 (1976 WG) at Catalina Station in Arizona .
(2404) Antarctica belongs to the Themis family, a group of asteroids named after (24) Themis . Although Themis asteroids are spectroscopically normally C asteroids , i.e. have a dark surface, Antarctica was found in an investigation according to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ) by Gianluca Masi , Sergio Foglia and Richard P. Binzel (2404) classified as an S-asteroid. After this rough examination, the asteroid would have a rather bright surface.
(2404) Antarctica is named after the continent Antarctica . Antonín Mrkos took part in the 3rd Soviet Antarctic Expedition in the International Geophysical Year 1957/58. The designation was made on the proposal of Mrkos by the International Astronomical Union (IAU) on February 8, 1992.
Web links
- (2404) Antarctica in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2404) Antarctica in the Small-Body Database of the Jet Propulsion Laboratory (English).
Individual evidence
- ↑ (2404) Antarctica at the IAU Minor Planet Center (English)
- ^ Gianluca Masi, Sergio Foglia, Richard P. Binzel: Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog . (English)
- ↑ subdivision of asteroids to S-types, C-types and V-types (English)
- ↑ Entry of the asteroid on the website of the Kleť Observatory (English)