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Members of the current RECONS 10 parsec sample are shown on the HR
Diagram (HRD), using Mv vs. V-K. Solid red and blue points indicate
stars and brown dwarfs for which RECONS has determined the first
accurate parallaxes placing them within 10 parsecs, including
unpublished systems. The Sun is represented by a yellow point, and
the four known subdwarfs are represented by green points.
The two asterisk points represent the three components of the AU/AT Mic system that is only about 10 Myr old. Our discovery that the X-ray active star, AP Col, is within 10 parsecs indicates a likely second very young system near the Sun. The twentieth nearest star system, GJ 1061, was found to be only 3.7 parsecs away by the RECONS team in 1997. Five additional systems have been found within 5 parsecs since 2000: LHS 288, SO 0253+1652, SCR 1845-6357 (a binary composed of one M dwarf and one T dwarf), DEN 1048-3958, and DEN 0255-4700. WT 460 B (spectral type L1.0) is a companion to a red dwarf. It is located at a very important spot in this figure, at what might be the empirical end of the stellar main sequence. We are closely following this binary system to determine masses for the components. The three objects to the lower right of WT 460 B are the other three L dwarfs known within 10 parsecs. (T dwarfs and planets are not shown on this figure because their V magnitudes have not yet been measured.) Finally, two white dwarfs, LHS 145 and GJ 2012, have recently been revealed to be within 10 parsecs.
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