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Star in the constellation Draco From Wikipedia, the free encyclopedia
WISEPA J195246.66+724000.8 (designation abbreviated to WISE 1952+7240, or WISE J1952+7240) is a brown dwarf of spectral class T4,[1] located in constellation Draco at approximately 44 light-years from Earth.[1]
Observation data Epoch MJD 55590.99[1] Equinox J2000[1] | |
---|---|
Constellation | Draco |
Right ascension | 19h 52m 46.61s[1] |
Declination | 72° 40′ 00.61″[1] |
Characteristics | |
Spectral type | T4[1] |
Apparent magnitude (J (2MASS filter system)) | 15.086±0.045[1] |
Apparent magnitude (H (2MASS filter system)) | 14.728±0.077[1] |
Apparent magnitude (KS (2MASS filter system)) | 14.650±0.078[1] |
Astrometry | |
Proper motion (μ) | RA: −220±69[1] mas/yr Dec.: −347±72[1] mas/yr |
Distance | ~ 44.4[1] ly (~ 13.6[1] pc) |
Other designations | |
Database references | |
SIMBAD | data |
WISE 1952+7240 was discovered in 2011 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 2011 Kirkpatrick et al. published a paper in The Astrophysical Journal Supplement, where they 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 1952+7240.[1][note 1]
Trigonometric parallax of WISE 1952+7240 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).
WISE 1952+7240 distance estimates
Non-trigonometric distance estimates are marked in italic.
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