2MASS J11145133-2618235

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Coordinates: Sky map 11h 14m 51.337s, −26° 18′ 23.56″

2MASS J11145133-2618235
Observation data
Epoch J2000[1]:{{{3}}}      Equinox J2000[1]:{{{3}}}
Constellation Hydra
Right ascension 11h 14m 51.337s[1]:{{{3}}}
Declination −26° 18′ 23.56″[1]:{{{3}}}
Characteristics
Spectral type T7.5[2]:{{{3}}}[3]:{{{3}}}[4]:{{{3}}}[5]:{{{3}}}[6]:{{{3}}}
Apparent magnitude (i (GMOS filter system)) 23.21 ± 0.09[5]:{{{3}}}
Apparent magnitude (z (GMOS filter system)) 19.59 ± 0.04[5]:{{{3}}}
Apparent magnitude (J (2MASS filter system)) >15.86 ± 0.08[2]:{{{3}}}[3]:{{{3}}}
Apparent magnitude (J (MKO filter system)) 15.52 ± 0.05[6]:{{{3}}}
Apparent magnitude (H (2MASS filter system)) >15.73 ± 0.12[3]:{{{3}}}
Apparent magnitude (H (MKO filter system)) 15.82 ± 0.05[6]:{{{3}}}
Apparent magnitude (KS (2MASS filter system)) >16.1[3]:{{{3}}}
Apparent magnitude (KS (MKO filter system)) 16.54 ± 0.05[6]:{{{3}}}
Astrometry
Proper motion (μ) RA: -3018.8 ± 1.1[7]:{{{3}}} mas/yr
Dec.: -384.1 ± 1.4[7]:{{{3}}} mas/yr
Parallax (π) 179.2 ± 1.4[7]:{{{3}}} mas
Distance 18.2 ± 0.1 ly
(5.58 ± 0.04 pc)
Details
Mass 0.029–0.048[4]:{{{3}}} M☉
Mass 30–50[4]:{{{3}}} MJup
Surface gravity (log g) 5.0–5.3[4]:{{{3}}} cgs
Temperature 725–775[4]:{{{3}}} K
Metallicity -0.3 ± 0.1 [m/H][4]:{{{3}}}
Age 3–8[4]:{{{3}}} Gyr
Other designations
2MASS J11145133-2618235,[1]:{{{3}}}[2]:{{{3}}}
2MASS 1114-2618,[3]:{{{3}}}
2M1114-26,[2]:{{{3}}}
2M1114-2618,[2]:{{{3}}}
2MASS 1114-26,[4]:{{{3}}}
2MASS J1114-2618,[6]:{{{3}}}
WISE J111448.79−261827.7[8]:{{{3}}}
Database references
SIMBAD data

2MASS J11145133-2618235 (designation abbreviated to 2MASS 1114-2618,[3]:{{{3}}} or 2M1114-26,[2]:{{{3}}} or 2M1114-2618,[2]:{{{3}}} or 2MASS 1114-26,[4]:{{{3}}} or 2MASS J1114-2618[6]:{{{3}}}) is nearby brown dwarf of spectral class T7.5,[2]:{{{3}}}[3]:{{{3}}}[4]:{{{3}}}[5]:{{{3}}}[6]:{{{3}}} located in constellation Hydra[note 1] at approximately 18 light-years from Earth.[7]:{{{3}}}

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.[2]:{{{3}}}

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.[7]:{{{3}}}

Photometric distance estimate of 2MASS 1114-2618, published in its discovery paper in 2005, is 7 pc (22.8 ly).[2]:{{{3}}} Spectrophotometric distance estimate by Kirkpatrick et al. (2012), is 6.6 pc (21.5 ly).[8]:{{{3}}}

Proper motion

2MASS 1114-2618 has quite a large proper motion of 3043.2 mas/yr with position angle 262.75 degrees,[7]:{{{3}}} indicating motion in south-west direction on the sky. At distance 18.20 ly (assuming parallax 179.2 ± 1.4 mas),[7]:{{{3}}} corresponding tangential velocity is 80.56 km/s.[7]:{{{3}}}

See also

The other four discoveries of brown dwarfs, presented in Tinney et al. (2005):[2]:{{{3}}}

Notes

  1. ↑ The nearest known star/brown dwarf in this constellation.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 5.2 5.3 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
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