DENIS J081730.0-615520

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DENIS J081730.0-615520
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 08h 17m 30.096s[1]
Declination −61° 55′ 15.802″[1]
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]
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 16.0 ± 1.0 ly
(4.9 ± 0.3 pc)
Mass 0.015[2] M
Radius ~0.1 R
Temperature 950[2] K
Other designations
DENIS J081730.0-615520
2MASS 08173001-6155158
WISEPA J081729.74-615504.1[3]
Database references

DENIS J081730.0-615520 (also known as 2MASS 08173001-6155158) is a T brown dwarf 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]


  1. ^ a b Chris Gelino, Davy Kirkpatrick, Adam Burgasser. "List of T dwarfs". DwarfArchives. Retrieved August 14, 2010. 
  2. ^ a b c d e f g h Artigau, Etienne; Radigan, Jacqueline; Folkes, Stuart et al. (2010). "DENIS J081730.0-615520: An overlooked mid-T dwarf in the solar neighborhood". The Astrophysical Journal Letters 718 (1): L38–L42. arXiv:1006.3577. Bibcode:2010ApJ...718L..38A. doi:10.1088/2041-8205/718/1/L38. 
  3. ^ Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, A.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; Bauer, James M.; Benford, Dominic J.; Bridge, Carrie R.; Lake, Sean E.; Petty, Sara M.; Stanford, S. A.; Tsai, Chao-Wei; Bailey, Vanessa; Beichman, Charles A.; Bloom, Joshua S.; Bochanski, John J.; Burgasser, Adam J.; Capak, Peter L.; Cruz, Kelle L.; Hinz, Philip M.; Kartaltepe, Jeyhan S.; Knox, Russell P.; Manohar, Swarnima; Masters, Daniel; Morales-Calderon, Maria; Prato, Lisa A.; Rodigas, Timothy J.; Salvato, Mara; Schurr, Steven D.; Scoville, Nicholas Z.; Simcoe, Robert A.; Stapelfeldt, Karl R.; Stern, Daniel; Stock, Nathan D.; Vacca, William D. (2011). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". The Astrophysical Journal Supplement 197 (2): 19. arXiv:1108.4677v1. Bibcode:2011ApJS..197...19K. doi:10.1088/0067-0049/197/2/19.  edit

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