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From: Mike Jr on 9 Apr 2010 21:07
"Here we report the discovery by the UKIDSS Galactic Plane Survey
(GPS)20 of UGPS J072227.51-054031.2 (hereafter UGPS 0722-05) – an even
cooler and less luminous brown dwarf. The candidate was initially
identified as the only good candidate late-T dwarf amongst the 604
million sources in Data Release 6 of the GPS using the
colour selection (J-H)<0.2 mag and (H-K)<0.1 mag, and various data
quality restrictions"

"The relative brightness of UGPS 0722-05 indicated that it must be
nearby, in interstellar terms. Our preliminary parallax is 340±40 mas
(see Supplementary Information) corresponding to distance, d=2.9±0.4
pc."

"The preliminary distance measurement indicates that UGPS 0722-05 is
the closest brown dwarf, closer than the brown dwarf binary ε Indi
Bab25, which orbits the star ε Indi A at d=3.626±0.009 pc. The current
distance estimate of 2.9 pc places it amongst the ten closest systems
to the sun."

http://arxiv.org/abs/1004.0317

--Mike Jr.
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