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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. It was found in 2007 to have a low-mass substellar companion in orbit around it. 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.
References
ChaHα8 Wikipedia(Text) CC BY-SA