WISE 1800+0134

WISEP J180026.60+013453.1 is a brown dwarf of spectral class L7.5, located in constellation Ophiuchus at approximately 26 light-years from Earth.

Discovery

WISEP J180026.60+013453.1 was discovered in 2011 by Gizis et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength ) space telescope, which mission lasted from December 2009 to February 2011. There are also precovery identifications of this object in Two Micron All-Sky Survey (2MASS) data and in the 3rd release of the database. On 2011 June 22 Gizis et al. had conducted near-infrared spectroscopy with SpeX spectrograph, mounted on the 3 m Infrared Telescope Facility (IRTF), located at the Mauna Kea Observatory in Hawaii. In 2011 Gizis et al. published a paper in The Astronomical Journal, where they presented discovery of a newfound by WISE L-type brown dwarf WISEP J180026.60+013453.1.

Physical properties

WISEP J180026.60+013453.1 has temperature 1430 ± 100 K and luminosity 10^{−4.5 ± 0.3} Solar luminosities. Mass estimates, determined from this temperature, are 0.04, 0.05, and 0.074 Solar masses, anyway below the hydrogen-burning limit, which implies that WISEP J180026.60+013453.1 is not a true star, but only a substellar object, that is a brown dwarf.

Failed test for binarity

WISEP J180026.60+013453.1 was tested spectroscopically for L + T binarity, and the binarity was not revealed. Common proper motion companions also were not found.