WISE 1738+2732

WISEPA J173835.53+273258.9
Observation data
Epoch MJD 55451.22[1]      Equinox J2000[1]
Constellation Hercules
Right ascension 17h 38m 35.54s[1]
Declination 27° 32′ 58.78″[1]
Characteristics
Spectral type Y0[1]
Apparent magnitude (J (MKO filter system)) 19.47 ± 0.08[1]
Apparent magnitude (H (MKO filter system)) 20.66 ± 0.38[1]
Astrometry
Proper motion (μ) RA: 602 ± 398[1] mas/yr
Dec.: -969 ± 456[1] mas/yr
Distance 11.1 + 12.7/- 0[2] ly
(3.4 + 3.9/- 0[2] pc)
Details
Mass 20 (20—30)[2] MJup
Radius 0.93 (0.86—0.94)[2] RJup
Surface gravity (log g) 4.75 (4.75—5.0)[2]
Temperature 350 (350—400)[2] K
Other designations
WISEPA J173835.53+273258.9[1], WISEP J1738+2732[2], WISE J1738+2732[1]

WISE 1738+2732 (full designation is WISEPA J173835.53+273258.9) is a brown dwarf of spectral class Y0[1], located in constellation Hercules. It is one of six Y-type brown dwarfs (along with WISE 0410+1502, WISE 1405+5534, WISE 1541-2250, WISE 1828+2650 and WISE 2056+1459) among 106 brown dwarfs (counting components of two binary systems[3]), discovered in 2011 by the Wide-field Infrared Survey Explorer, and, probably, one of the nearest brown dwarfs. Its photometric distance estimate is 10.5 pc (34.2 ly)[1], and its spectroscopic distance estimate is 3.4 + 3.9/- 0 pc (11.1 + 12.7/- 0 ly)[2]. The objects's temperature estimate is 350 (350—400) K.[2] Its spectrum is similar with spectum of another Y-dwarf WISE 1405+5534. Currently available astrometry for this object (six months) is not enough to derive its trigonometric parallax.[1]

See also

References

  1. ^ a b c d e f g h i j k l m n Kirkpatrick, J. Davy; Cushing; Gelino; Griffith; Skrutskie; Marsh; Wright; Mainzer; Eisenhardt; McLean; Thompson; Bauer; Benford; Bridge; Lake; Petty; Stanford; Tsai; Bailey; Beichman; Bochanski; Burgasser; Capak; Cruz; Hinz; Kartaltepe; Knox; Manohar; Masters; Morales-Calderónn; Prato; Rodigas; Salvato; Schurr; Scoville; Simcoe; Stapelfeldt; Stern; Stock; Vacca (2011). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". arXiv:1108.4677v1 [astro-ph.SR]. 
  2. ^ a b c d e f g h i Cushing, Michael C.; Kirkpatrick; Gelino; Griffith; Skrutskie; Mainzer; Marsh; Beichman; Burgasser; Prato; Simcoe; Marley; Saumon; Freedman; Eisenhardt; Wright (2011). "THE DISCOVERY OF Y DWARFS USING DATA FROM THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE)". arXiv:1108.4678v1 [astro-ph.SR]. 
  3. ^ Gelino; Kirkpatrick; Cushing; Eisenhardt; Griffith; Mainzer; Marsh; Skrutskie; Wright (2011). "WISE Brown Dwarf Binaries: The Discovery of a T5+T5 and a T8.5+T9 System". arXiv:1106.3142v1 [astro-ph.SR]. 

Coordinates: 17h 38m 35.54s, +27° 32′ 58.78″

Stars of Hercules
Bayer
Flamsteed
Nearby