UGPS J0521+3640

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

UGPS J0521+3640[1]
Observation data
Epoch 2007.82      Equinox J2000
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
Distance 26.7+3.9
Mass 14–32 MJup
Radius 0.8–1.0 RJup
Surface gravity (log g) 4.5–5.0 cgs
Temperature 600–650 K

UGPS J0521+3640 is a nearby brown dwarf of spectral class T8.5, located in constallation 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
pc, or 26.7+3.9

See also[edit]


  1. ^ a b c Burningham, Ben; Lucas; Leggett; Smart; Baker; Pinfield; Tinney; Homeier; Allard; Zhang; Gomes; Day-Jones; Jones; Kovacs; Lodieu; Marocco; Murray; Sipocz (2011). "The discovery of the T8.5 dwarf UGPS J0521+3640". arXiv:1104.1526v3Freely accessible [astro-ph.SR].