ULAS J101821.78 + 072547.1
Brown dwarf ULAS J101821.78 + 072547.1 |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | lion |
Right ascension | 10 h 18 m 21.78 s |
declination | + 07 ° 25 ′ 47.1 ″ |
Apparent brightness | J-band: (17.71 ± 0.04) mag |
distance | approx. 100 to 200 ly (approx. 30 to 50 pc ) |
Typing | |
Spectral class | T5.0 ± 0.5 |
Physical Properties |
ULAS J101821.78 + 072547.1 is a brown dwarf of the spectral class T5 in the constellation Leo . Due to the relationship between absolute brightness and spectral type, its distance is estimated to be around 30 to 50 parsecs . The high brightness measured in the K-band and a narrow peak in the Y-band indicate that it is a relatively metal-rich object. The property was designed by Lodieu et al. Discovered in the data of the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1) and published in 2007.
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- Nicolas Lodieu et al. a .: Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS Large Area Survey Data Release 1 . In: Monthly Notices of the Royal Astronomical Society , Vol. 379 (2007), Issue 4, pp. 1423ff. bibcode : 2007MNRAS.379.1423L