 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[1] |
| Declination | +25° 03′ 02.74″[1] |
| B | |
| Right ascension | 04h 23m 35.3912s[2] |
| Declination | +25° 03′ 02.74″[2] |
| Characteristics | |
| Spectral type | M7.25 + M9.25[3] |
| Apparent magnitude (G) | 15.2[1] + 20.5[2] |
| Variable type | T Tau[4] |
| Astrometry | |
| A | |
| Proper motion (μ) | RA: 6.895[1] mas/yr Dec.: −21.026[1] mas/yr |
| Parallax (π) | 7.5981 ± 0.1497 mas[1] |
| Distance | 429 ± 8 ly (132 ± 3 pc) |
| B | |
| Proper motion (μ) | RA: 12.450[2] mas/yr Dec.: −21.761[2] mas/yr |
| Parallax (π) | 7.4909 ± 1.2887 mas[2] |
| Distance | approx. 440 ly (approx. 130 pc) |
| Details | |
| A | |
| Mass | 0.05[5] M☉ |
| Radius | 1.8[5] R☉ |
| Luminosity | 0.2[3] L☉ |
| Temperature | 2,838[3] K |
| Age | ≤1[5] Myr |
| B | |
| Mass | 0.015[5] M☉ |
| Luminosity | 0.0039[3] L☉ |
| Temperature | 2,375[3] K |
| Age | 1[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | A |
| 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.
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