WISEPA J231336.40-803700.3

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Coordinates: Sky map 23h 13m 36.45s, −80° 37′ 00.7″

WISEPA J231336.40-803700.3
Observation data
Epoch MJD 55480.40[1]      Equinox J2000[1]
Constellation Octans
Right ascension 23h 13m 36.45s[1]
Declination −80° 37′ 00.7″[1]
Spectral type T8[2][1][3]
Apparent magnitude (J (2MASS filter system)) 16.974 ± 0.236[1]
Apparent magnitude (H (2MASS filter system)) >16.192[1]
Apparent magnitude (KS (2MASS filter system)) >16.358[1]
Proper motion (μ) RA: 237 ± 24[1] mas/yr
Dec.: -401 ± 28[1] mas/yr
Distance ~ 35.9[3] ly
(~ 11.0[3] pc)
Mass 7 ± 3[2] MJup
Surface gravity (log g) 4.0 ± 0.3[2] cgs
Temperature 600 ± 30[2] K
Age 0.3 ± 0.4[2] Gyr
Other designations
WISEPA J231336.40-803700.3[1]
WISE J2313-8037[1]

WISEPA J231336.40-803700.3 (designation abbreviated to WISE 2313-8037, or WISE J2313-8037) is a brown dwarf of spectral class T8,[2][1][3] located in constellation Octans at approximately 36 light-years from Earth.[3]


WISE 2313-8037 was discovered in 2011 by Burgasser et al. 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. However, WISE 2313-8037 has a faint counterpart in the 2MASS Reject Catalog (detection grade of "E").[2] On 2010 September 20 (UT) Burgasser et al. had conducted follow-up observations (spectroscopy) of WISE 2313-8037 with the FIRE spectrograph mounted on the Magellan 6.5 m Baade Telescope located at Las Campanas Observatory in Chile. In 2011 Burgasser et al. published a paper in The Astrophysical Journal, where they presented discovery of five new found by WISE brown dwarfs, including WISE 2313-8037.[2] Also, this is one of six earliest brown dwarf discoveries from data, collected by WISE, — published before Kirkpatrick et al. (2011)[1]


Trigonometric parallax of WISE 2313-8037 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).

WISE 2313-8037 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Burgasser et al. (2011)
11.7 ± 1.6 38.2 ± 5.2 [2]
Burgasser et al. (2011)
(spectral model fit)
9.3 ± 0.4 30.3 ± 1.3 [2]
Kirkpatrick et al. (2011) ~11.2 ~36.5 [1]
Kirkpatrick et al. (2012) ~11.0 ~35.9 [3]

Non-trigonometric distance estimates are marked in italic.

Space motion[edit]

WISE 2313-8037 has proper motion of about 466 milliarcseconds per year.[1]

WISE 2313-8037 proper motion estimates

Source μ,
P. A.,
Burgasser et al. (2011) 552 154 242 ± 32 -496 ± 29 [2]
Kirkpatrick et al. (2011) 466 149 237 ± 24 -401 ± 28 [1]

The most accurate estimates are marked in bold.

Clouds and young age[edit]

According its discovery paper, WISE 2313-8037 is a cloudy and young brown dwarf of age about 0.3 (0 to 0.7) Gyr.[2]

Properties of WISE 2313-8037 as well as other similar objects may indicate a trend that younger brown dwarf have cloudier atmospheres.[2]

See also[edit]

The other five earliest brown dwarf discoveries from data collected by WISE:


  1. ^ a b c d e f g h i j k l m n o p q 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 d e f g h i j k l m n Burgasser, Adam J.; Cushing, Michael C.; Kirkpatrick, J. Davy; Gelino, Christopher R.; Griffith, Roger L.; Looper, Dagny L.; Tinney, Christopher; Simcoe, Robert A.; Bochanski, John J.; Skrutskie, Michael F.; Mainzer, A.; Thompson, Maggie A.; Marsh, Kenneth A.; Bauer, James M.; Wright, Edward L. (2011). "Fire Spectroscopy of Five Late-type T Dwarfs Discovered with the Wide-field Infrared Survey Explorer". The Astrophysical Journal 735 (2): 116. arXiv:1104.2537. Bibcode:2011ApJ...735..116B. doi:10.1088/0004-637X/735/2/116.  edit
  3. ^ a b c d e f 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
  4. ^ Mainzer, A.; Cushing, Michael C.; Skrutskie, M.; Gelino, C. R.; Kirkpatrick, J. Davy; Jarrett, T.; Masci, F.; Marley, Mark S.; Saumon, D.; Wright, E.; Beaton, R.; Dietrich, M.; Eisenhardt, P.; Garnavich, P.; Kuhn, O.; Leisawitz, D.; Marsh, K.; McLean, I.; Padgett, D.; Rueff, K. (2011). "The First Ultra-cool Brown Dwarf Discovered by the Wide-field Infrared Survey Explorer". The Astrophysical Journal 726 (1): 30. arXiv:1011.2279. Bibcode:2011ApJ...726...30M. doi:10.1088/0004-637X/726/1/30.  edit