WISEPA J171104.60+350036.8

WISE J1711+3500 (also known as WISEPA J171104.60+350036.8) is a binary consisting of a brown dwarf and a planetary-mass object or brown dwarf. Both objects are late T dwarfs.^[1]

WISE J1711+3500

WISE J1711+3500 with JWST MIRI. The primary is on the lower left.
Observation data Epoch J2000      Equinox J2000
Constellation	Hercules
Right ascension	17h 11m 04.73s
Declination	+35° 00′ 37.63″
Characteristics
Evolutionary stage	brown dwarf
Spectral type	T8+T9.5[1]
Astrometry
Proper motion (μ)	RA: -157.6 ±0.6 mas/yr[2] Dec.: -76.3 ±0.6 mas/yr[2]
Parallax (π)	43.3±1.9 mas[2]
Distance	75 ± 3 ly (23 ± 1 pc)
Details[1]
WISE J1711+3500A
Mass	19-23 MJ or 44-48 MJup
Temperature	675-870 K
WISE J1711+3500B
Mass	8.1-10.7 MJ or 20-26 MJup
Temperature	420-540 K
Position (relative to WISE J1711+3500A)[3]
Component	WISE J1711+3500B
Angular distance	780.0 ±2.0 mas
Projected separation	15.0 ±2.0 AU
Other designations
** LIM 6, CNS5 4209, WDS J17111+3501AB, WISEA J171104.59+350036.7, WISEP J171104.60+350036.8, WISE J171104.60+350036.8, EQ J1711+3500
Database references
SIMBAD	data

WISE J1711+3500 was discovered in 2011 with the Wide-field Infrared Survey Explorer and with a spectrum from NASA IRTF as a T8 dwarf.^[4] In 2012 it was discovered that this object is a binary from imaging with the Keck telescope. The individual spectral types were estimated to be T8 for the primary and T9.5 for the secondary. The pair is separated by 15 ± 2 astronomical units (AU). For an age of 1 billion years the masses are around 19–23 M_J for the primary and around 8.1–10.7 M_J for the secondary. For an age of 5 billion years the masses are around 44–48 M_J for the primary and 20–26 M_J for the secondary. The orbital period was poorly constrained, but is larger than 200 years.^[1]

See also

• List of directly imaged exoplanets

Other late T to Y dwarf binaries:

• WISE 1217+1626 T9+Y0
• WISE J0336−0143 Y+Y
• CFBDSIR J1458+1013 T9+Y0
• WISE 0146+4234 T9+Y0
• WISE 0226−0211 T8+Y0?