WISEPC J013836.59-032221.2

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Coordinates: Sky map 01h 38m 36.59s, −03° 22′ 21.57″

WISEPC J013836.59-032221.2
Observation data
Epoch MJD 55570.43[1]      Equinox J2000[1]
Constellation Cetus
Right ascension 01h 38m 36.59s[1]
Declination −03° 22′ 21.57″[1]
Spectral type T3[1]
Apparent magnitude (J (2MASS filter system)) 16.36 ± 0.07[1]
Apparent magnitude (H (2MASS filter system)) 15.65 ± 0.05[1]
Apparent magnitude (KS (2MASS filter system)) 15.30 ± 0.08[1]
Proper motion (μ) RA: 132 ± 16[1] mas/yr
Dec.: -276 ± 15[1] mas/yr
Distance ~ 57.7[1] ly
(~ 17.7[1] pc)
Other designations
WISEPC J013836.59-032221.2[1]
WISE J0138-0322[1]
WISE 0138-0322[1]

WISEPC J013836.59-032221.2 (designation abbreviated to WISE 0138-0322, or WISE J0138-0322) is a brown dwarf of spectral class T3,[1] located in constellation Cetus at approximately 58 light-years from Earth.[1]


WISE 0138-0322 was discovered in 2011 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satelliteNASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. In 2011 Kirkpatrick et al. published a paper in The Astrophysical Journal Supplement, where they presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 0138-0322.[1][note 1]


Trigonometric parallax of WISE 0138-0322 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).

WISE 0138-0322 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Kirkpatrick et al. (2011) ~17.7 ~57.7 [1]

Non-trigonometric distance estimates are marked in italic.


  1. ^ This 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries was published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries was published later.


  1. ^ a b c d e f g h i j k l m n o p q r s Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, A.; 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, S. A.; 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.  edit