CI Tauri
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 33m 52.01440s |
| Declination | +22° 50′ 30.0941″ |
| Apparent magnitude (V) | 13.8 |
| Characteristics | |
| Evolutionary stage | T Tauri star |
| Spectral type | K4IVe |
| Variable type | Orion variable |
| Astrometry | |
| Radial velocity (Rv) | +16.2 km/s |
| Proper motion (μ) | RA: +8.942 mas/yr Dec.: –17.079 mas/yr |
| Parallax (π) | 6.2376±0.0205 mas |
| Distance | 523 ± 2 ly (160.3 ± 0.5 pc) |
| Details | |
| Mass | 0.90±0.02 M☉ |
| Radius | 1.679 R☉ |
| Rotation | 6.6 d or 9 d |
| Age | 2-3 Myr |
| Other designations | |
| CI Tau, 2MASS J04335200+2250301, EPIC 247584113 | |
| Database references | |
| SIMBAD | data |
CI Tauri is a young star, about 2 million years old, located approximately 523 light-years (160 parsecs) away in the constellation Taurus. It is still accreting material from a debris disk at an unsteady pace, possibly modulated by the eccentric orbital motion of an inner planet. The spectral signatures of compounds of sulfur were detected from the disk.
The magnetic field on the surface of CI Tauri, equal to 0.22 T, is close to average for T Tauri stars.