| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Carina |
| Right ascension | 08h 17m 30.096s[1] |
| Declination | −61° 55′ 15.802″[1] |
| Characteristics | |
| Spectral type | T6[2] |
| Apparent magnitude (J) | 13.6 |
| J−H color index | 0.087 ± 0.039[2] |
| J−K color index | 0.093 ± 0.049[2] |
| Astrometry | |
| Radial velocity (Rv) | ? km/s |
| Proper motion (μ) | RA: 336 ± 54 mas/yr Dec.: 1095 ± 410 mas/yr |
| Parallax (π) | 204.08 ± 12.49[2] mas |
| Distance | 16 ± 1 ly (4.9 ± 0.3 pc) |
| Details | |
| Mass | 0.015[2] M☉ |
| Radius | ~0.1 R☉ |
| Temperature | 950[2] K |
DENIS J081730.0-615520 (also known as 2MASS 08173001-6155158) is a T dwarf star about 5 pc (16 light years) away in the constellation Carina. It was discovered by Etienne Artigau and his colleagues in April 2010. The star belongs to the T6 spectral class implying a photosphere temperature of about 950 K. It has a mass of about 15 MJ (Jupiter masses) or about 1.5 % the mass of the Sun.[2]
DENIS J081730.0-615520 is the second nearest isolated T dwarf to the Sun (after UGPS J0722-05) and the fifth nearest (also after ε Indi Bab and SCR 1845-6357B) if one takes into account T dwarfs in multiple star systems. It is also the brightest T dwarf in the sky (in the J-band); it had been missed before due to its proximity to the galactic plane.[2]
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