Wise J004945.61+215120.0

WISE J004945.61+215120.0
	; WISE J004945.61+215120.0 is the faint red dot in the middle of the image; Credit: legacy surveys
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	00h 49m 45.61s
Declination	21° 51′ 20″
Characteristics
Spectral type	T8.5
Astrometry
Proper motion (μ)	RA: -483.2 mas/ yr ; Dec.: -46.5 mas/ yr
Parallax (π)	139.9 ± 2.5 mas
Distance	23.3 ± 0.4 ly ; (7.1 ± 0.1 pc)
Other designations
	WISE J004945.61+215120.0
Database references
SIMBAD	data

WISE J004945.61+215120.0 is a brown dwarf of spectral class T8.5,^[1] located in constellation Andromeda at approximately 24 light-years from Earth.^[1]

Discovery

WISE J004945.61+215120.0 was discovered in 2012 by Mace 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. In 2013, the discovery paper was published.^[3]

Distance

Currently the most accurate distance estimate of WISE J004945.61+215120.0 is a trigonometric parallax, published in 2019 by Kirkpatrick et al.: 7.1+0.1
−0.1 pc, or 23.3+0.4
−0.4 ly.^[2]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h Kirkpatrick, 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. S2CID 119279752.
^ ^a ^b Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. (February 2019). "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime". The Astrophysical Journal Supplement Series. 240 (2): 69. arXiv: 1812.01208. Bibcode: 2019ApJS..240...19K. doi: 10.3847/1538-4365/aaf6af. 19.
^ Mace, Gregory N.; Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; mix, Katholeen; Bailey, Vanessa; Beichman, Charles A.; Bloom, Joshua S.; Burgasser, Adam J.; Fortney, Jonathan J.; Hinz, Philip M.; Knox, Russell P.; Lowrance, Patrick J.; Marley, Mark S.; Morley, Caroline V.; Rodigas, Timothy J.; Saumon, Didier; Sheppard, Scott S.; Stock, Nathan D. (2013). "A Study of the Diverse T Dwarf Population Revealed by WISE". The Astrophysical Journal Supplement Series. 205 (6): 1–49. arXiv: 1301.3913. Bibcode: 2013ApJS..205....6M. doi: 10.1088/0067-0049/205/1/6. S2CID 10535516.

[Kirkpatrick2012-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h Kirkpatrick, 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. S2CID 119279752.

[Kirkpatrick2019-2] Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. (February 2019). "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime". The Astrophysical Journal Supplement Series. 240 (2): 69. arXiv: 1812.01208. Bibcode: 2019ApJS..240...19K. doi: 10.3847/1538-4365/aaf6af. 19.

[Mace2013-3] Mace, Gregory N.; Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; mix, Katholeen; Bailey, Vanessa; Beichman, Charles A.; Bloom, Joshua S.; Burgasser, Adam J.; Fortney, Jonathan J.; Hinz, Philip M.; Knox, Russell P.; Lowrance, Patrick J.; Marley, Mark S.; Morley, Caroline V.; Rodigas, Timothy J.; Saumon, Didier; Sheppard, Scott S.; Stock, Nathan D. (2013). "A Study of the Diverse T Dwarf Population Revealed by WISE". The Astrophysical Journal Supplement Series. 205 (6): 1–49. arXiv: 1301.3913. Bibcode: 2013ApJS..205....6M. doi: 10.1088/0067-0049/205/1/6. S2CID 10535516.

[1]

[2]

[3]

Observation data Epoch J2000^[1] Equinox J2000^[1]
WISE J004945.61+215120.0 is the faint red dot in the middle of the image Credit: legacy surveys
Constellation	Andromeda
Right ascension	00^h 49^m 45.61^s^[1]
Declination	21° 51′ 20″^[1]
Characteristics
Spectral type	T8.5^[1]
Astrometry

Proper motion (μ)	RA: -483.2 mas/ yr Dec.: -46.5 mas/ yr
Parallax (π)	139.9 ± 2.5 mas^[2]
Distance	23.3 ± 0.4 ly (7.1 ± 0.1 pc)

Other designations
WISE J004945.61+215120.0^[1]
Database references
SIMBAD	data