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ChaHα8 (also written ChaHa8 when Greek letters are unavailable) is a brown dwarf 522 light years from Earth discovered in 2000.[1] It was found in 2007 to have a low-mass substellar companion in orbit around it.[2] The companion has a mass of 25–31 Jupiter masses and orbits with a period of 5.2 years and an eccentricity of 0.59.[3]


  1. ^ Comerón, F.; Neuhäuser, R.; Kaas, A. A. (2000). "Probing the brown dwarf population of the Chamaeleon I star forming region". Astronomy and Astrophysics. 359: 269–288. Bibcode:2000A&A...359..269C. 
  2. ^ Joergens, V.; A. Mueller (2007). "16–20 Jupiter mass RV companion orbiting the brown dwarf candidate ChaHa8". arXiv:0707.3744free to read. Bibcode:2007ApJ...666L.113J. doi:10.1086/521825. 
  3. ^ Joergens, V.; Müller, A.; Reffert, S. (2010). "Improved radial velocity orbit of the young binary brown dwarf candidate Cha Hα 8". Astronomy and Astrophysics. 521 (A24). arXiv:1006.2383free to read. Bibcode:2010A&A...521A..24J. doi:10.1051/0004-6361/201014853. 

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