Astronomy:UGPS J0521+3640

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Short description: Brown dwarf star in the constellation Auriga

Coordinates: Sky map 05h 21m 27.27s, +36° 40′ 48.6″

UGPS J0521+3640[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Auriga
Right ascension  05h 21m 27.27s
Declination +36° 40′ 48.6″
Spectral type T8.5
Apparent magnitude (J (UKIDSS filter system)) 16.94 ± 0.02
Apparent magnitude (H (UKIDSS filter system)) 17.28 ± 0.04
Apparent magnitude (K (UKIDSS filter system)) 17.32 ± 0.09
Proper motion (μ) RA: 513 mas/yr
Dec.: −1507 mas/yr
Distance26.7+3.9−3.3 ly
(8.2+1.2−1.0 pc)
Mass14–32 MJup
Radius0.8–1.0 RJup
Surface gravity (log g)4.5–5.0 cgs
Temperature600–650 K
Database references

UGPS J0521+3640 is a nearby brown dwarf of spectral class T8.5, located in constellation Auriga. It was discovered in 2011 using United Kingdom Infrared Telescope (UKIRT), UKIRT Infrared Deep Sky Survey (UKIDSS), UGPS (UKIDSS Galactic Plane Survey) component, 6th data release.[1]

Its photometric distance estimate is 8.2+1.2−1.0 pc, or 26.7+3.9−3.3 ly.[1]

See also


  1. 1.0 1.1 1.2 Burningham, Ben; Lucas; Leggett; Smart; Baker; Pinfield; Tinney; Homeier et al. (2011). "The discovery of the T8.5 dwarf UGPS J0521+3640". Monthly Notices of the Royal Astronomical Society: Letters 414 (1): L90–L94. doi:10.1111/j.1745-3933.2011.01062.x. Bibcode2011MNRAS.414L..90B.