SIMP J013656.5+093347

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SIMP J013656.5+093347
Observation data
Epoch J2000      Equinox J2000
Constellation Pisces
Right ascension 01h 36m 57s
Declination +09° 33′ 47.3″
Characteristics
Spectral type T2.5
Apparent magnitude (J) 13.455 ± 0.030
Apparent magnitude (H) 12.771 ± 0.032
Apparent magnitude (K) 12.562 ± 0.024
Astrometry
Parallax (π) 156.25 ± 7 mas
Distance 20.9 ± 0.9 ly
(6.4 ± 0.3 pc)
Details
Other designations
2MASS J01365662+0933473;
IPMS J013656.57+093347.3;
IBIS J013656.57+093347.3

SIMP J013656.5 +093347 is a brown dwarf in the constellation Pisces. It belongs to the spectral class T2.5 and its position shifts due to its proper motion annually by about 1.24 arcsec with a position angle of about 90°.

This brown dwarf provided the first evidence for periodic variability flux variations among T dwarfs. This has been interpreted as a signature of weather patterns coming in and out of view over the object's 2.4h rotation period. The shape of this lightcurve evolves over timescales of days, which has been interpreted as a sign of evolution of the cloud patterns in its atmosphere.

External links[edit]

Coordinates: Sky map 01h 36m 57s, +09° 33′ 47″