WISEPA J195246.66+724000.8
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Coordinates: 
19h 52m 46.61s, +72° 40′ 00.61″
| Observation data Epoch MJD 55590.99[1]:{{{3}}} Equinox J2000[1]:{{{3}}} |
|
|---|---|
| Constellation | Draco |
| Right ascension | 19h 52m 46.61s[1]:{{{3}}} |
| Declination | 72° 40′ 00.61″[1]:{{{3}}} |
| Characteristics | |
| Spectral type | T4[1]:{{{3}}} |
| Apparent magnitude (J (2MASS filter system)) | 15.086±0.045[1]:{{{3}}} |
| Apparent magnitude (H (2MASS filter system)) | 14.728±0.077[1]:{{{3}}} |
| Apparent magnitude (KS (2MASS filter system)) | 14.650±0.078[1]:{{{3}}} |
| Astrometry | |
| Proper motion (μ) | RA: −220±69[1]:{{{3}}} mas/yr Dec.: −347±72[1]:{{{3}}} mas/yr |
| Distance | ~ 44.4[1]:{{{3}}} ly (~ 13.6[1]:{{{3}}} pc) |
| Other designations | |
WISEPA J195246.66+724000.8 (designation abbreviated to WISE 1952+7240, or WISE J1952+7240) is a brown dwarf of spectral class T4,[1]:{{{3}}} located in constellation Draco at approximately 44 light-years from Earth.[1]:{{{3}}}
Contents
Discovery
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]:{{{3}}}[note 1]
Distance
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
| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|
| Kirkpatrick et al. (2011) | ~13.6 | ~44.4 | [1]:{{{3}}} |
Non-trigonometric distance estimates are marked in italic.
Notes
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