(1089) Tama
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Asteroid (1089) Tama |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.2136 AU |
| eccentricity | 0.1275 |
| Perihelion - aphelion | 1.9314 AU - 2.4957 AU |
| Inclination of the orbit plane | 3.7267 ° |
| Length of the ascending node | 71.4968 ° |
| Argument of the periapsis | 354.3006 ° |
| Sidereal period | 3.29 a |
| Mean orbital velocity | 20.019 km / s |
| Physical Properties | |
| Medium diameter | 12.92 km |
| Albedo | 0.2424 |
| Rotation period | 16.44 h |
| Absolute brightness | 11.7 mag |
| Spectral class | ? |
| history | |
| Explorer | Okuro Oikawa |
| Date of discovery | November 17, 1927 |
| Another name | 1927 WB , 1930 ST, 1952 HE 4 |
| 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. | |
(1089) Tama is an asteroid of the main belt , which on 17th November 1927 by Japanese astronomers Okuro Oikawa in Tokyo was discovered. The name of the asteroid is derived from the Tama River , which flows near the Tokyo Astronomical Observatory.
In January 2004 an international research team reported on the investigation of light curves of the asteroid beginning in December 2003. According to their evaluation, (1089) Tama is probably a double system, in which the larger body of an approximately 7 km large companion in around 16.44 h, i.e. synchronized with the rotation time. The companion is named S / 2003 (1089) 1 . The distance between the two bodies of about 20 km from center to center is very small.
See also
Web links
- Asteroid Tama: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (1089) Tama in the Small-Body Database of the Jet Propulsion Laboratory (English).
- (1089) Tama in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
swell
- ↑ Jan. 16th (1089) Tama double asteroid appulse / occultation in NC & GA. IOTA, January 19, 2004