%0 Journal Article
%T NEOWISE-R Observation of the Coolest Known Brown Dwarf
%A Edward L. Wright
%A Amy Mainzer
%A J. Davy Kirkpatrick
%A Frank Masci
%A Michael C. Cushing
%A James Bauer
%A Sergio Fajardo-Acosta
%A Christopher R. Gelino
%A Charles A. Beichman
%A M. F. Skrutskie
%A T. Grav
%A Peter R. M. Eisenhardt
%A Roc Cutri
%J Physics
%D 2014
%I arXiv
%R 10.1088/0004-6256/148/5/82
%X The Wide-field Infrared Survey Explorer (WISE) spacecraft has been reactivated as NEOWISE-R to characterize and search for Near Earth Objects. The brown dwarf WISE J085510.83-071442.5 has now been reobserved by NEOWISE-R, and we confirm the results of Luhman (2014b), who found a very low effective temperature ($\approx 250$ K), a very high proper motion (8.1 +/- 0.1 arcsec/yr) , and a large parallax (454 +/- 45 mas). The large proper motion has separated the brown dwarf from the background sources that influenced the 2010 WISE data, allowing a measurement of a very red WISE color of W1-W2 $> 3.9$ mag. A re-analysis of the 2010 WISE astrometry using only the W2 band, combined with the new NEOWISE-R 2014 position, gives an improved parallax of 448 +/- 33 mas and proper motion of 8.08 +/- 0.05\; arcsec/yr. These are all consistent with Luhman (2014b).
%U http://arxiv.org/abs/1405.7350v2