WISEPA J195246.66+724000.8

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Coordinates: Sky map 19h 52m 46.61s, +72° 40′ 00.61″

WISEPA J195246.66+724000.8
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[1]:{{{3}}}
WISE J1952+7240[1]:{{{3}}}
WISE 1952+7240[1]:{{{3}}}

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}}}

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 satelliteNASA 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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References

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