OTS 44

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OTS 44
Brown dwarf OTS 44 with disc.jpg
An artist's concept of OTS 44's dust disk
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Chamaeleon
Right ascension 11h 10m 11.5s
Declination –76° 32′ 13″
Spectral type M9.5[1]
Distance 554 ly
(170 pc)
Mass 0.015[1] M
Radius 0.23[1] R
Luminosity 0.0013[1] L
Temperature 2,300 K

OTS 44 is a brown dwarf located about 550 light-years (170 pc) away in constellation Chamaeleon. It is among the smallest known brown dwarfs, with about 15 times the mass of Jupiter, or about 1.5% that of the Sun. Its radius is about 23% of the Sun's.[1]

This brown dwarf is located in the star-forming region Chamaeleon I. Based upon infrared observations with the Spitzer Space Telescope, OTS 44 emits an excess of infrared radiation for an object of its type, suggesting it has a circumstellar disk of dust and particles of rock and ice. This disk has an inner radius roughly three times the radius of OTS 44 and is accreting matter at the rate of about 10−10 the mass of the Sun per year. It could eventually develop into a planetary system.[1]

See also[edit]

  • SCR 1845-6357, a binary system comprising a red dwarf and a brown dwarf
  • Cha 110913-773444, an astronomical object (that may be a free-floating planet) surrounded by what appears to be a protoplanetary disk


  1. ^ a b c d e f Luhman, K. L. et al. (February 2005), "Spitzer Identification of the Least Massive Known Brown Dwarf with a Circumstellar Disk", The Astrophysical Journal 620 (1): L51–L54, arXiv:astro-ph/0502100, Bibcode:2005ApJ...620L..51L, doi:10.1086/428613 

External links[edit]