FU Tauri

FU Tauri

FU Tauri and its companion (lower left)
Credit: Image Credit: NASA/ESA/CSA JWST; Ya-Lin Wu et al.; processing: Meli_thev
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
A
Right ascension 04h 23m 35.3912s
Declination +25° 03′ 02.74″
B
Right ascension 04h 23m 35.3912s
Declination +25° 03′ 02.74″
Characteristics
Spectral type M7.25 + M9.25
Apparent magnitude (G) 15.2 + 20.5
Variable type T Tau
Astrometry
A
Proper motion (μ) RA: 6.895 mas/yr
Dec.: −21.026 mas/yr
Parallax (π)7.5981±0.1497 mas
Distance429 ± 8 ly
(132 ± 3 pc)
B
Proper motion (μ) RA: 12.450 mas/yr
Dec.: −21.761 mas/yr
Parallax (π)7.4909±1.2887 mas
Distanceapprox. 440 ly
(approx. 130 pc)
Details
A
Mass0.05 M
Radius1.8 R
Luminosity0.2 L
Temperature2,838 K
Age≤1 Myr
B
Mass0.015 M
Luminosity0.0039 L
Temperature2,375 K
AgeMyr
Other designations
WDS J04236+2503A, 2MASS J04233539+2503026, Gaia DR2 149629483705467008
Database references
SIMBADA
B

FU Tauri is a brown dwarf binary system in the constellation of Taurus about 429 light years away. The secondary is very close to the lower limit for brown dwarfs and several databases list it as a distant massive exoplanet.