DENIS-P J082303.1-491201 b

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DENIS-P J082303.1-491201 b
Discovered by Sahlmann et al. (2013)
Discovery site ESO telescopes at the La Silla Paranal Observatory
Discovery date August 2013
Transit photometry
2MASS J08230313-4912012 b[2]
Orbital characteristics[2]
0.36±0.01 AU
Eccentricity 0.345+0.068
Inclination 56.6+1.9
Physical characteristics
Mass 28.5±1.9 MJ[2]

DENIS-P J082303.1-491201 b (alias 2MASS J08230313-4912012 b) is a substellar object, classified as either an exoplanet or a brown dwarf, orbiting DENIS-P J082303.1-491201,[3] an L1.5-type brown dwarf in the constellation Vela. As of March 2014, DENIS-P J082303.1-491201 b, with a mass of nearly 29 MJ, is listed as the most massive exoplanet so far discovered.[2]


DENIS-P J082303.1-491201 b was discovered by Sahlmann et al. (2013) using the ESO telescopes at the La Silla Paranal Observatory.[1] It is part of an ultracool binary system.[1]



DENIS-P J082303.1-491201 b is located 20.77 parsecs (67.7 ly) from Earth. At 28.5±1.9 MJ,[2] it is listed as the most massive planet in the NASA Exoplanet Archive, although, according to most definitions, this object is too massive to be a planet and is more properly classified as a brown dwarf.


DENIS-P J082303.1-491201 b orbits the nearby L1.5-type brown dwarf DENIS-P J082303.1-491201, which is 7.5±0.7% the mass of our Sun,[1] and has an orbital period of about 246 days.[1][2]

See also[edit]


  1. ^ a b c d e Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, E. L.; Queloz, D.; et al. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". Astronomy & Astrophysics. 556. A133. Bibcode:2013A&A...556A.133S. arXiv:1306.3225Freely accessible. doi:10.1051/0004-6361/201321871. 
  2. ^ a b c d e f "DENIS-P J082303.1-491201 b". Caltech. Retrieved 8 March 2014. 
  3. ^ "2MASS J08230313-4912012". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 March 2014. 

External links[edit]