WISEPA J162208.94-095934.6

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Coordinates: Sky map 16h 22m 08.95s, −09° 59′ 34.78″

WISEPA J162208.94-095934.6
Observation data
Epoch MJD 55432.49[1]      Equinox J2000[1]
Constellation Scorpius
Right ascension 16h 22m 08.95s[1]
Declination −09° 59′ 34.78″[1]
Spectral type T6[1][2][3]
Apparent magnitude (I (VST)) 20.86 ± 0.50[3]
Apparent magnitude (z (VST)) 20.72 ± 0.11[3]
Apparent magnitude (J (VST)) 16.218 ± 0.011[3]
Apparent magnitude (J (2MASS filter system)) 16.44 ± 0.03[1]
Apparent magnitude (H (2MASS filter system)) 16.05 ± 0.05[1]
Apparent magnitude (KS (VST)) 16.448 ± 0.155[3]
Apparent magnitude (KS (2MASS filter system)) 16.07 ± 0.11[1]
Proper motion (μ) RA: 76.9 ± 11.5[3] mas/yr
Dec.: 59.5 ± 9.5[3] mas/yr
Distance 52.2 ± 6.5[3] ly
(15.99 ± 1.98[3] pc)
Other designations
WISEPA J162208.94-095934.6[1]
WISE J1622-0959[1]
WISE 1622-0959[1]

WISEPA J162208.94-095934.6 (designation abbreviated to WISE 1622-0959, or WISE J1622-0959) is a brown dwarf of spectral class T6,[1][2][3] located in constellation Scorpius at approximately 52 light-years from Earth.[3]


WISE 1622-0959 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 1622-0959.[1][note 1]


Trigonometric parallax of WISE 1622-0959 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrophotometric — means (see table).

WISE 1622-0959 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Kirkpatrick et al. (2011) ~17.3 ~56.4 [1]
Kirkpatrick et al. (2012) ~16.2 ~52.8 [2]
Lodieu et al. (2012) 15.99 ± 1.98 52.2 ± 6.5 [3]

Non-trigonometric distance estimates are marked in italic.

Space motion[edit]

WISE 1622-0959 has proper motion of about 97 milliarcseconds per year.[3]

WISE 1622-0959 proper motion estimates

Source μ,
P. A.,
Kirkpatrick et al. (2011) 101 58 85 ± 23 54 ± 26 [1]
Lodieu et al. (2012) 97 52 76.9 ± 11.5 59.5 ± 9.5 [3]

The most accurate estimates are marked in bold.


  1. ^ 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.


  1. ^ a b c d e f g h i j k l m n o 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
  2. ^ a b c Kirkpatrick, J. D.; Gelino, C. R.; Cushing, M. C.; Mace, G. N.; Griffith, R. L.; Skrutskie, M. F.; Marsh, K. A.; Wright, E. L.; Eisenhardt, P. R.; McLean, I. S.; Mainzer, A. K.; Burgasser, A. J.; Tinney, C. G.; Parker, S.; Salter, G. (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.  edit
  3. ^ a b c d e f g h i j k l m n Lodieu, N.; Burningham, B.; Day-Jones, A.; Scholz, R.-D.; Marocco, F.; Koposov, S.; Barrado y Navascués, D.; Lucas, P. W.; Cruz, P.; Lillo, J.; Jones, H.; Perez-Garrido, A.; Ruiz, M. T.; Pinfield, D.; Rebolo, R.; Béjar, V. J. S.; Boudreault, S.; Emerson, J. P.; Banerji, M.; González-Solares, E.; Hodgkin, S. T.; McMahon, R.; Canty, J.; Contreras, C. (2012). "First T dwarfs in the VISTA Hemisphere Survey". Astronomy & Astrophysics 548: A53. arXiv:1210.5148. Bibcode:2012A&A...548A..53L. doi:10.1051/0004-6361/201220182.  edit