DENIS-P J1228.2-1547 is a system of two nearly equal brown dwarfs, both are of spectral types L5.5:, located in constellation Corvus at approximately 20.2 parsecs or 66.0 light-years from Earth.
History of observations
DENIS-P J1228.2-1547 is one on the first free-floating L dwarfs discovered. It was discovered in 1997 by Xavier Delfosse and colleagues from the DENIS survey.
The second component (B) was discovered by MartÃn and colleagues using near-infrared camera NICMOS on Hubble Space Telescope. It was announced in 1999.
References
DENIS-P J1228.2-1547 Wikipedia(Text) CC BY-SA