2MASS J03202839−0446358
| 2MASS J03202839−0446358 | |
|---|---|
|
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|
| Constellation | Eridanus |
| Right ascension | 03 h 20 m 28 s |
| declination | −4 ° 46 ′ 36 ″ |
| Brightness (J-band, common) | (13.26 ± 0.02) mag |
| Spectral class | approx.M8.5 + T5 ± 1 |
| Double system | |
| Period of circulation | (246.7 ± 0.5) days |
| Age | > (2.0 ± 0.3) billion years |
| Other names | |
| 2MASSW J0320284−0446362 • 2MASSI J0320283−044635 | |
2MASS J03202839−0446358 , also 2MASS J0320−0446 for short , is a spectroscopic double system with a period of 0.7 years and consists of an M and a T dwarf. The minimum age of the system is estimated at around 2 billion years, the minimum mass of the components at 0.08 and 0.05 solar masses .
literature
- Adam J. Burgasser, Cullen H. Blake: An Age Constraint for the very low Mass Stellar / Brown Dwarf Binary 2MASS J03202839-0446358AB . In: The Astronomical Journal Vol. 137, No. 6 (2009), pp. 4621-4626, doi : 10.1088 / 0004-6256 / 137/6/4621 , online