2MASS 1503+2525

2MASS J15031961+2525196 (2MASS 1503+2525) is a nearby brown dwarf of spectral type T5.5,[3] located in constellation Boötes at approximately 20.7 light-years from Earth.[4]

2MASS J15031961+2525196
Observation data
Epoch J2000[1]      Equinox J2000[1]
Constellation Boötes
Right ascension 15h 03m 19.613s[1]
Declination 25° 25 19.68[1]
Spectral type T5.5
Proper motion (μ) RA: 87.722 mas/yr
Dec.: 559.220 mas/yr
Parallax (π)154.9208 ± 1.1025[2] mas
Distance21.1 ± 0.1 ly
(6.45 ± 0.05 pc)
Other designations
Gaia DR2 1267906854386665088, 2MASS J15031961+2525196[1]
Database references

History of observations


2MASS 1503+2525 was discovered in 2003 by Adam J. Burgasser et al. in wide-field search for T dwarfs using the Two Micron All Sky Survey (2MASS).


Originally the most precise distance estimate of 2MASS 1503+2525 is a trigonometric parallax, published by Dupuy and Liu in 2012: 157.2 ± 2.2 mas, corresponding to a distance 6.36 ± 0.09 pc, or 20.7 ± 0.3 ly.[4] The parallax was further refined by Gaia mission in 2018 to 154.9208±1.1025mas. The brown dwarf 2MASS 1503+2525 lies in local void 6.5 parsecs across, where relatively few stars and brown dwarfs are located.[5]


  1. "2MASS J15031961+2525196 -- Brown Dwarf (M<0.08solMass)". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2013-09-19.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. Burgasser, A. J.; Kirkpatrick, J. Davy; McElwain, Michael W.; Cutri, Roc M.; Burgasser, Albert J.; Skrutskie, Michael F. (2003). "The 2Mass Wide-Field T Dwarf Search. I. Discovery of a Bright T Dwarf within 10 Parsecs of the Sun". The Astronomical Journal. 125 (2): 850–857. arXiv:astro-ph/0211117. Bibcode:2003AJ....125..850B. doi:10.1086/345975. S2CID 15764829.
  4. Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement. 201 (2): 19. arXiv:1201.2465. Bibcode:2012ApJS..201...19D. doi:10.1088/0067-0049/201/2/19. S2CID 119256363.
  5. Bihain, G.; Scholz, R.-D. (2016), "A non-uniform distribution of the nearest brown dwarfs", Astronomy & Astrophysics, 589: A26, arXiv:1603.00714, doi:10.1051/0004-6361/201528007, S2CID 119102741

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