WISE J0521 1025

WISE J0521+1025
	WISE J0521+1025 Location of WISE J0521+1025 in the constellation Orion;
Observation data; Epoch 2012.773 Equinox J2000
Constellation	Orion
Right ascension	05h 21m 26.349s
Declination	10° 25′ 27.41″
Characteristics
Spectral type	T7.5
Apparent magnitude (J (2MASS))	15.262
Apparent magnitude (H (2MASS))	15.222 ± 0.103
Apparent magnitude (Ks (2MASS))	14.665
Apparent magnitude (w1 (WISE))	14.098 ± 0.031
Apparent magnitude (w2 (WISE))	12.286 ± 0.026
Apparent magnitude (w3 (WISE))	10.306 ± 0.085
Astrometry
Proper motion (μ)	RA: +223.7±2.5 mas/yr ; Dec.: −438.3±2.5 mas/yr
Parallax (π)	150.2 ± 3.0 mas
Distance	21.7 ± 0.4 ly ; (6.7 ± 0.1 pc)
Details
Temperature	727±88 K
Other designations
	WISE J052126.29+102528.4; WISE J0521+1025
Database references
SIMBAD	data

WISE J0521+1025 is a nearby brown dwarf of spectral type T7.5, located in the constellation Orion at approximately 21.7 light-years (6.7 parsecs) from Earth.^[2]

At the time of discovery, it was the nearest known T dwarf in the northern sky.^[1]

History of observations

WISE J0521+1025 was discovered by Bihain et al. by selection of sources with colours typical for T dwarfs from WISE All-Sky source catalogue and checking them for high proper motion using older surveys: 2MASS, DENIS, SDSS, SSS, DSS and UKIDSS. Three objects among about ten candidates, including WISE J0521+1025, were selected for spectroscopic follow up with Large Binocular Telescope (LBT). October 9, 2012 Bihain et al. carried out follow up observations of WISE J0521+1025 with near-Infrared spectrograph LUCI 1 on LBT. June 25, 2013 Astronomy & Astrophysics received the discovery paper, which was accepted for publication 10 July 2013.^[1]

Distance

Distance of WISE J0521+1025 was estimated by Bihain et al. using mean absolute magnitudes of single T7.5 dwarfs, derived by Dupuy & Liu (2012) from trigonometric parallaxes:^[3] 5.0 ± 1.3 pc (16.3 ± 4.2 ly).^[1]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o Bihain, Gabriel; Scholz, Ralf-Dieter; Storm, Jesper; Schnurr, Olivier (2013). "An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc". Astronomy & Astrophysics. 557: A43. arXiv:1307.2722. Bibcode:2013A&A...557A..43B. doi:10.1051/0004-6361/201322141. S2CID 118454396.
^ ^a ^b ^c ^d Kirkpatrick, J. Davy; Gelino, Christopher R.; Faherty, Jacqueline K.; Meisner, Aaron M.; Caselden, Dan; Schneider, Adam C.; Marocco, Federico; Cayago, Alfred J.; Smart, R. L.; Eisenhardt, Peter R.; Kuchner, Marc J. (2021). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and y Dwarfs". The Astrophysical Journal Supplement Series. 253 (1): 7. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. S2CID 227126954.
^ Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement. 201 (2): 19. arXiv:1201.2465. Bibcode:2012ApJS..201...19D. doi:10.1088/0067-0049/201/2/19. S2CID 119256363.

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[Bihain2013-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o Bihain, Gabriel; Scholz, Ralf-Dieter; Storm, Jesper; Schnurr, Olivier (2013). "An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc". Astronomy & Astrophysics. 557: A43. arXiv:1307.2722. Bibcode:2013A&A...557A..43B. doi:10.1051/0004-6361/201322141. S2CID 118454396.

[Kirkpatrick_et_al._2021-2] Kirkpatrick, J. Davy; Gelino, Christopher R.; Faherty, Jacqueline K.; Meisner, Aaron M.; Caselden, Dan; Schneider, Adam C.; Marocco, Federico; Cayago, Alfred J.; Smart, R. L.; Eisenhardt, Peter R.; Kuchner, Marc J. (2021). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and y Dwarfs". The Astrophysical Journal Supplement Series. 253 (1): 7. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. S2CID 227126954.

[Dupuy_&_Liu2012-3] Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement. 201 (2): 19. arXiv:1201.2465. Bibcode:2012ApJS..201...19D. doi:10.1088/0067-0049/201/2/19. S2CID 119256363.

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Observation data Epoch 2012.773^[1] Equinox J2000
WISE J0521+1025 Location of WISE J0521+1025 in the constellation Orion
Constellation	Orion
Right ascension	05^h 21^m 26.349^s^[1]
Declination	10° 25′ 27.41″^[1]
Characteristics
Spectral type	T7.5^[1]
Apparent magnitude (J (2MASS))	15.262^[1]
Apparent magnitude (H (2MASS))	15.222 ± 0.103^[1]
Apparent magnitude (K_s (2MASS))	14.665^[1]
Apparent magnitude (w1 (WISE))	14.098 ± 0.031^[1]
Apparent magnitude (w2 (WISE))	12.286 ± 0.026^[1]
Apparent magnitude (w3 (WISE))	10.306 ± 0.085^[1]
Astrometry

Proper motion (μ)	RA: +223.7±2.5 mas/yr^[2] Dec.: −438.3±2.5 mas/yr^[2]
Parallax (π)	150.2 ± 3.0 mas^[2]
Distance	21.7 ± 0.4 ly (6.7 ± 0.1 pc)

Details

Temperature	727±88^[2] K

Other designations
WISE J052126.29+102528.4^[1] WISE J0521+1025^[1]
Database references
SIMBAD	data

History of observations

Distance

See also

References