DENIS J081730.0 615520

DENIS J081730.0-615520 (also known as 2MASS 08173001-6155158) is a T brown dwarf approximately 16 ly (4.9 pc) 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 M_J (Jupiter masses) or about 1.5% the mass of the Sun.

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.