UGPS J072227.51−054031.2

Brown dwarf star in the constellation Monoceros

UGPS J072227.51−054031.2

Near-infrared discovery image of UGPS J0722-05
Observation data J2000.0      Equinox J2000.0
Constellation	Monoceros
Right ascension	07h 22m 27.29s[1]
Declination	−05° 40′ 30.0″[2]
Characteristics
Spectral type	T9[2]
Apparent magnitude (i (AB SDSS))	24.32 ± 0.12[3]
Apparent magnitude (z)	20.51 ± 0.09[1][4]
Apparent magnitude (Y)	17.37 ± 0.02[1]
Apparent magnitude (J)	16.52 ± 0.02[1]
Apparent magnitude (H)	16.90 ± 0.02[1]
Apparent magnitude (K)	17.07 ± 0.08[1]
Apparent magnitude (L')	13.4 ± 0.3[1]
Apparent magnitude (N)	10.28 ± 0.24[1]
Distance		13.4 ± 0.1 ly (4.12 ± 0.04 pc)
Details
Gyr
Other designations
WISEPA J072227.27−054029.9[6] ,GJ 11075[7]
Database references
SIMBAD	data
Monoceros

UGPS J072227.51−054031.2 (designation often abbreviated to UGPS 0722−05) is a brown dwarf of late T type, or possibly a rogue planet located approximately 4.1 parsecs (13 light-years) from Earth.^[3]

History of observations

Discovery

The

UGPS 0722−05 has proper motion of about 970 milliarcseconds per year.[3]

Radial velocity of UGPS 0722-05, measured by Bochanski et al. and published in 2011, is 46.9 ± 2.5 km/s.^{[4][~ 1]}

Properties

The object is roughly the volume of Jupiter, but is estimated to have 5–40 Jupiter masses (M_J).^[1] This would make it less massive than ε Indi Ba. Planets have a mass of less than about 13 Jupiter masses. Infrared spectra shows the object contains water vapor and methane and has a surface temperature of approximately 480–560 kelvins.^[1]

Notes

References