WISE 2220−3628

WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0,[1] located in constellation Grus at approximately 26 light-years from Earth.[1]

WISE J222055.31−362817.4

Observation data Epoch J2000[1]      Equinox J2000[1]
Constellation	Grus
Right ascension	22^h 20^m 55.31^s[1]
Declination	−36° 28′ 17.4″[1]
Characteristics
Spectral type	Y0[1]
Apparent magnitude (J (MKO-NIR filter system))	20.38 ± 0.17[1]
Apparent magnitude (H (MKO-NIR filter system))	20.81 ± 0.30[1]
Astrometry
Distance	~ 26.4[1] ly (~ 8.1[1] pc)
Other designations
WISE J222055.31−362817.4,[1] WISE 2220−3628[1]
Database references
SIMBAD	data

Discovery

WISE 2220−3628 was discovered in 2012 by J. Davy Kirkpatrick 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 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 2220−3628.[1]

Properties

Y-class dwarfs are among the coldest of all brown dwarfs.[1]

Distance

Trigonometric parallax of WISE 2220−3628 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).

WISE 2220-3628 distance estimates

Source	Parallax, mas	Distance, pc	Distance, ly	Ref.
Kirkpatrick et al. (2012), Table 8		8.1	26.4	[1]

Non-trigonometric distance estimates are marked in italic.

See also

• List of star systems within 25–30 light-years
• WISE 0146+4234 (Y0)
• WISE 0350−5658 (Y1)
• WISE 0359−5401 (Y0)
• WISE 0535−7500 (≥Y1)
• WISE 0713−2917 (Y0)
• WISE 0734−7157 (Y0)

References

1. 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.