- 1089 Tama
-
1089 Tama DiscoveryDiscovered by Okuro Oikawa Discovery date November 17, 1927 DesignationsNamed after Tama River Alternate name(s) A894 VA; A904 VD;
A919 HA; 1927 WB;
1930 ST; 1952 HE4Minor planet
categoryMain belt Epoch November 26, 2005 (JD 2453700.5) Aphelion 373.513 Gm (2.497 AU) Perihelion 288.749 Gm (1.930 AU) Semi-major axis 331.131 Gm (2.213 AU) Eccentricity 0.128 Orbital period 1202.846 d (3.29 a) Average orbital speed 19.94 km/s Mean anomaly 236.255° Inclination 3.730° Longitude of ascending node 71.565° Argument of perihelion 354.336° Physical characteristicsDimensions 12.9 km Mass 2.2×1015? kg Mean density 2.0? g/cm³ Equatorial surface gravity 0.0036? m/s² Escape velocity 0.0068? km/s Rotation period 0.6852±0.0002 d Albedo 0.24 Temperature ~179 K Spectral type ? Absolute magnitude (H) 11.6 1089 Tama is an asteroid orbiting the Sun. It is named after the Tama River in Japan.
A satellite, designated S/2003 (1089) 1, was identified based on lightcurve observations from 24 December 2003 to 5 January 2004 by Raoul Behrend, René Roy, Claudine Rinner, Pierre Antonini, Petr Pravec, Alan W. Harris, Stefano Sposetti, Russell I. Durkee, and Alain Klotz. This was announced on 12 January 2004. The moon, about 9 km in diameter, orbits 20 km away in 0.6852±0.0002 d (synchronously) and may actually be in contact with its primary.
External links
Minor planets navigator Small Solar System bodies Minor planets - Designation
- Groups
- Moons
- Meanings of names
- Pronunciation of names
Comets Meteoroids Lists / categories - Asteroid groups and families
- Asteroid moons
- Binary asteroids
- Minor planets
Categories:- Main Belt asteroids
- Binary asteroids
- Asteroids named for places
- Astronomical objects discovered in 1927
- Main Belt asteroid stubs
Wikimedia Foundation. 2010.
