NStars 2: Proper motion stars --- | ... This immediately suggests a possible method of finding sub-stellar mass objects - look for low-luminosity companions to stars which we already know lie within the immediate Solar Neighbourhood. ... As summarised by Oppenheimer et al (2001), while the Palomar/JHU survey turned up a few new stellar companions, the only other brown dwarf is Gl 570D, discovered directly from 2MASS data by Burgasser et al (2000a). ... 0.06 . ... 2001 . ... Companion search index . ...