Apparent magnitude (J (2MASS filter system)) 16.800 ± 0.035 Apparent magnitude (H (2MASS filter system)) 16.912 ± 0.082 Apparent magnitude (KS (2MASS filter system)) >15.626 | Apparent magnitude (J (MKO filter system)) 16.64 ± 0.03 Apparent magnitude (H (MKO filter system)) 16.99 ± 0.04 Spectral type T5 | |
WISEPA J184124.74+700038.0 (designation is abbreviated to WISE 1841+7000) is a binary system of brown dwarfs of spectral classes T5 + T5, located in constellation Draco at approximately 131 light-years from Earth. It is notable for being one of the first known binary brown dwarf systems.
Contents
Discovery
WISE 1841+7000 was discovered in 2011 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. WISE 1841+7000A has two discovery papers: Gelino et al. (2011) and Kirkpatrick et al. (2011). Gelino et al. examined for binarity nine brown dwarfs using Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescope on Mauna Kea; seven of these nine brown dwarfs were also newfound, including WISE 1841+7000. These observations had indicated that two of these nine brown dwarfs, including WISE 1841+7000, are binary. Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1841+7000.
Discovery of the component B
Component B of the system was discovered in 2011 Gelino et al. with Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescope. It was presented in the same article as the component A.
Distance
Trigonometric parallax of WISE 1841+7000 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).
WISE 1841+7000 distance estimates
Non-trigonometric distance estimates are marked in italic. The best estimate is marked in bold.