WISE J014656.66+423410.0 (designation abbreviated to WISE 0146+4234) is a binary brown dwarf of spectral classes T9 and Y0 located in the constellation Andromeda. It is approximately 60 light-years from Earth.
Analysis of the spectrum shows that the binary is probably old and has a total mass of for an age of 10 billion years. If it is however young (about 1 billion years), it would be a pair of planetary-mass objects with a total mass of . For an old system an orbital period of ≤10 years was predicted. Another work estimated an age of 5 ±3 billion years, which was then used to estimate masses of 7-15 and 6-14 .
WISE 0146+4234 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 0146+4234.
The distance of WISE 0146+4234 was initially estimated to be 20 light-years from earth. Later measurements of its stellar parallax showed that it was actually 60 light-years away.
The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012):