ChaHα8 (also written ChaHa8 when Greek letters are unavailable) is a binary brown dwarf about 640 light-years (200 parsecs) from Earth in the constellation Chamaeleon.

The designation indicates that it is in the Chamaeleon I star-forming region and that it displays hydrogen-alpha emission.

[5] It was found in 2007 to have a low-mass substellar companion in orbit around it via radial velocity observations.

[3] The companion has a mass of 25–31 Jupiter masses, and the pair orbit each other with a period of 5.2 years and an eccentricity of 0.59.

[4] This brown dwarf-related article is a stub.