Constellation Hydra | ||
People also search for 52 Hydrae, LHS 3003, 2MASS 0939-2448 | ||
2MASS J11145133-2618235 (designation abbreviated to 2MASS 1114-2618, or 2M1114-26, or 2M1114-2618, or 2MASS 1114-26, or 2MASS J1114-2618) is nearby brown dwarf of spectral class T7.5, located in constellation Hydra at approximately 18 light-years from Earth.
Contents
Discovery
2MASS 1114-2618 was discovered in 2005 by C. G. Tinney et al. from the 2MASS Wide-Field T Dwarf Search (WFTS), based on observations obtained at the Anglo-Australian Telescope, Siding Spring, Australia. In 2005 Tinney et al. published a paper in The Astronomical Journal, where they presented discovery of five new brown dwarfs of spectral type T, among which also was 2MASS 1114-2618.
Distance
Trigonometric parallax of 2MASS 1114-2618, measured in 2012 by Dupuy & Liu under The Hawaii Infrared Parallax Program, is 0.1792 ± 0.0014 arcsec, corresponding to a distance 5.58 ± 0.04 pc, or 18.20 ± 0.14 ly.
Photometric distance estimate of 2MASS 1114-2618, published in its discovery paper in 2005, is 7 pc (22.8 ly). Spectrophotometric distance estimate by Kirkpatrick et al. (2012), is 6.6 pc (21.5 ly).
Proper motion
2MASS 1114-2618 has quite a large proper motion of 3043.2 mas/yr with position angle 262.75 degrees, indicating motion in south-west direction on the sky. At distance 18.20 ly (assuming parallax 179.2 ± 1.4 mas), corresponding tangential velocity is 80.56 km/s.