WISEPA J025409.45+022359.1 (designation is abbreviated toWISE 0254+0223) is abrown dwarf ofspectral class T8,[2][8] located in constellationCetus at approximately 22.3light-years fromEarth.[5] It was discovered by astronomers from theLeibniz Institute for Astrophysics Potsdam.[6]
WISE 0254+0223 was discovered in 2011 from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite—NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. WISE 0254+0223 has two discovery papers:Scholz et al. (2011) andKirkpatrick et al. (2011) (the first was published earlier).[6][2]
Currently the most accurate distance estimate of WISE 0254+0223 is atrigonometric parallax, measured using theSpitzer Space Telescope and published in 2019 by Kirkpatricket al.:146.1±1.5 mas, corresponding to a distance6.84±0.07 pc, or22.3±0.2 ly.[5]
^These 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries were published later.
^In this parallax and distance estimates the most probable distance value does not equal toinverse maximum likelihood parallax value, as would be in the case of exact parallax and distance values. This is because Marsh et al. used a more sophisticated method of converting maximum likelihood parallaxes into most probable distances, that uses also someprior information, and not just the calculation of the inverse value. (The method description see in Marsh et al. (2013), Section 4).
^abcdefghijklmnKirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, Amy K.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; Bauer, James M.; Benford, Dominic J.; Bridge, Carrie R.; Lake, Sean E.; Petty, Sara M.; Stanford, Spencer Adam; Tsai, Chao-Wei; Bailey, Vanessa; Beichman, Charles A.; Bloom, Joshua S.; Bochanski, John J.; Burgasser, Adam J.; Capak, Peter L.; Cruz, Kelle L.; Hinz, Philip M.; Kartaltepe, Jeyhan S.; Knox, Russell P.; Manohar, Swarnima; Masters, Daniel; Morales-Calderon, Maria; Prato, Lisa A.; Rodigas, Timothy J.; Salvato, Mara; Schurr, Steven D.; Scoville, Nicholas Z.; Simcoe, Robert A.; Stapelfeldt, Karl R.; Stern, Daniel; Stock, Nathan D.; Vacca, William D. (2011). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)".The Astrophysical Journal Supplement.197 (2): 19.arXiv:1108.4677v1.Bibcode:2011ApJS..197...19K.doi:10.1088/0067-0049/197/2/19.S2CID16850733.
^abcdLiu, Michael C.; Deacon, Niall R.; Magnier, Eugene A.; Dupuy, Trent J.; Aller, Kimberly M.; Bowler, Brendan P.; Redstone, Joshua; Goldman, Bertrand; Burgett, W. S.; Chambers, K. C.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Morgan, J. S.; Price, P. A.; Tonry, J. L.; Wainscoat, R. J. (2011). "A Search for High Proper Motion T Dwarfs with PAN-STARRS1 + 2MASS + WISE".The Astrophysical Journal Letters.740 (2): L32.arXiv:1107.4608.Bibcode:2011ApJ...740L..32L.doi:10.1088/2041-8205/740/2/L32.S2CID118650819.
^abKirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function".The Astrophysical Journal.753 (2): 156.arXiv:1205.2122.Bibcode:2012ApJ...753..156K.doi:10.1088/0004-637X/753/2/156.S2CID119279752.
^Scholz, R.-D.; Bihain, G.; Schnurr, O.; Storm, J. (2011). "Two very nearby (d~5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data".arXiv:1105.4059v1 [astro-ph.GA].
