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2MASS J21392676+0220226 is a binary brown dwarf system[2] 47 light years from Earth.[6] The surface of the brighter component is thought to be host to a massive storm,[7] resulting in large variability of its color.[8] The brown dwarf system 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]
Characteristics
CFBDS J213926+022023 A
Spectral type L8.5[2]
Apparent magnitude (J) 14.710[3]
Apparent magnitude (H) 14.16[1]
Apparent magnitude (K) 13.58[1]
CFBDS J213926+022023 B
Spectral type T3.5[2]
Astrometry
Parallax (π)101.5 ± 2.0 mas[4]
Distance32.1 ± 0.6 ly
(9.9 ± 0.2 pc)
Details
Rotation7.614±0.178 h[5]
Other designations
CFBDS J213926+022023, 2MUCD 20912, WISEP J213927.09+022023.7
Database references
SIMBADdata



References


  1. Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
  2. Reylé, C.; Jardine, K.; Fouqué, P.; Caballero, J. A.; Smart, R. L.; Sozzetti, A. (2021), "The 10 parsec sample in the Gaia era", Astronomy & Astrophysics, 650: A201, arXiv:2104.14972, doi:10.1051/0004-6361/202140985, S2CID 233476431
  3. "2MASS J21392676+0220226". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 December 2016.
  4. 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.
  5. Tannock, Megan E.; Metchev, Stanimir; Heinze, Aren; Miles-Páez, Paulo A.; Gagné, Jonathan; Burgasser, Adam; Marley, Mark S.; Apai, Dániel; Suárez, Genaro; Plavchan, Peter (2021), "Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-cool Dwarfs", The Astronomical Journal, 161 (5): 224, arXiv:2103.01990, doi:10.3847/1538-3881/abeb67, S2CID 232105126
  6. Andrew Fazekas. "Colossal Storm May Rage on Jupiter-like 'Failed Star'".
  7. Dean Praetorius. "Brown Dwarf May Be Host To Massive, Violent Mega Storm". The Huffington Post, 9/13/2011.
  8. Lew, Ben W. P.; Apai, Dániel; Zhou, Yifan; Radigan, Jacqueline; Marley, Mark; Schneider, Glenn; Cowan, Nicolas B.; Miles-Páez, Paulo A.; Manjavacas, Elena; Karalidi, Theodora; Bedin, L. R.; Lowrance, Patrick J.; Burgasser, Adam J. (2020), "Cloud Atlas: Weak Color Modulations Due to Rotation in the Planetary-mass Companion GU PSC b and 11 Other Brown Dwarfs", The Astronomical Journal, 159 (3): 125, arXiv:1912.02812, doi:10.3847/1538-3881/ab5f59, S2CID 208637110

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