TWA 5
| TWA 5 (CD −33 ° 7795) |
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|---|---|
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Hydra |
| Right ascension | 11 h 31 m 55.3 s |
| declination | −34 ° 36 ′ 27 ″ |
| Astrometry | |
| Radial velocity | (13 ± 4) km / s |
| distance | approx. 160 ly approx. 50 pc |
| Other names | |
| CD −33 ° 7795 • TYC 7223-275-1 • 2MASS J11315526-3436272 | |
TWA 5 (also CD −33 ° 7795 ) is a young multiple system in the constellation Hydra , about 160 light years away from the earth , which consists of a close double or even triple star system and a companion of the spectral class M8 to M9, which lasts for almost 2 arc seconds is separated from the narrow central system and which is presumably a brown dwarf. The outside companion TWA 5 B was developed by Webb et al. discovered with the help of speckle interferometry. The system belongs to the TW-Hydrae Association .
literature
RA Webb et al .: Discovery of seven T Tauri stars and a brown dwarf candidate in the nearby TW Hydrae association. In: Astrophys. J. , Vol. 512, 1999, pp. L63-L67.