DENIS J081730.0−615520 (also known as 2MASS 08173001−6155158) is a T-type brown dwarf 17 light-years (5.2 parsecs) away in the constellation Carina. It was discovered by Etienne Artigau and his colleagues in April 2010.[2] The brown dwarf belongs to the T6 spectral class, with a photosphere temperature of about 1000 K.[4] It has a mass of about 15 MJ (Jupiter masses) or about 1.5% the mass of the Sun.[failed verification]
  DENIS J081730.0−615520 Location of DENIS J081730.0−615520 in the constellation Carina | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 17m 29.99888s[1] |
| Declination | −61° 55′ 15.6586″[1] |
| Characteristics | |
| Spectral type | T6[2] |
| Apparent magnitude (J) | 13.613±0.024[2] |
| J−H color index | 0.087 ± 0.039[2] |
| J−K color index | 0.093 ± 0.049[2] |
| Astrometry | |
| Proper motion (μ) | RA: −156.451(507) mas/yr[1] Dec.: 1,099.366(503) mas/yr[1] |
| Parallax (π) | 191.8362 ± 0.4186 mas[1] |
| Distance | 17.00 ± 0.04 ly (5.21 ± 0.01 pc) |
| Details | |
| Radius | 0.94±0.16[3] RJup |
| Temperature | 1004±91[4] K |
| Rotation | 2.8±0.2 hours[5] |
| Age | 1[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
DENIS J081730.0-615520 is the fourth-nearest isolated T dwarf to the Sun (after UGPS J0722−0540, WISE 1741+2553, and WISE 1506+7027) and the eighth-nearest (also after Luhman 16B, ε Indi Bab and SCR 1845-6357B) if one takes into account T dwarfs in multiple star systems.[7] 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]
References
External links
- Astronomers Announce First Clear Evidence of a Brown Dwarf – STScI news release STScI-1995-48 (November 29, 1995)