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WISEPA J173835.53 273258.9

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Constellation
  
Hercules

WISE 1738+2732 (full designation WISEPA J173835.53+273258.9) is a brown dwarf of spectral class Y0, located in constellation Hercules at 25.5 light-years from Earth.

Contents

Discovery

WISE 1738+2732 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 1738+2732 has two discovery papers: Kirkpatrick et al. (2011) and Cushing et al. (2011), however, basically with the same authors and published nearly simultaneously.

  • 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 1738+2732.
  • Cushing et al. presented discovery of seven brown dwarfs — one of T9.5 type, and six of Y-type — first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class WISE 1828+2650, and WISE 1738+2732. These seven objects are also the faintest seven of 98 brown dwarfs, presented in Kirkpatrick et al. (2011).

    • Distance

    Currently the most accurate distance estimate of WISE 2056+1459 is a trigonometric parallax, published in 2014 by Beichman et al.: 0.128 ± 0.010 arcsec, corresponding to a distance 7.8+0.7
    −0.6     pc, or 25.5+2.2
    −1.8     ly.

    Space motion

    WISE 1738+2732 has proper motion of about 451 milliarcseconds per year.

    Properties

    The object's temperature estimate is 350 (350—400) K. Its spectrum is similar with spectrum of another Y-dwarf WISE 1405+5534.

    References

    WISEPA J173835.53+273258.9 Wikipedia
    (Text) CC BY-SA