2MASS J21392676+0220226

2MASS J21392676+0220226 is a brown dwarf 47 light years from earth.[4] Its surface is thought to be host to a massive storm.[5] It was discovered in the Two Micron All-Sky Survey (2MASS).

2MASS J21392676+0220226
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 39m 26.769s[1]
Declination +02° 20 22.70[1]
Spectral type T1.5[2]
Apparent magnitude (J) 14.710[2]
Apparent magnitude (H) 14.16[1]
Apparent magnitude (K) 13.58[1]
Parallax (π)101.5 ± 2.0[3] mas
Distance32.1 ± 0.6 ly
(9.9 ± 0.2 pc)
Other designations
CFBDS J213926+022023, 2MUCD 20912, WISEP J213927.09+022023.7
Database references
  • Burgasser, Adam J.; Cruz, Kelle L.; Cushing, Michael; Gelino, Christopher R.; Looper, Dagny L.; Faherty, Jacqueline K.; Kirkpatrick, J. Davy; Reid, I. Neill (2010). "SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition". The Astrophysical Journal. 710 (2): 1142–1169. arXiv:0912.3808. Bibcode:2010ApJ...710.1142B. doi:10.1088/0004-637X/710/2/1142. S2CID 30729652.


  1. Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  2. "2MASS J21392676+0220226". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 December 2016.
  3. Smart, R. L. (2013). "NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results". Monthly Notices of the Royal Astronomical Society. 433 (3): 2054–2063. arXiv:1306.4527. Bibcode:2013MNRAS.433.2054S. doi:10.1093/mnras/stt876. S2CID 1376087.
  4. Andrew Fazekas. "Colossal Storm May Rage on Jupiter-like 'Failed Star'".
  5. Dean Praetorius. "Brown Dwarf May Be Host To Massive, Violent Mega Storm". The Huffington Post, 9/13/2011.
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