Y Tauri
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 45m 39.4101s |
| Declination | +20° 41′ 42.149″ |
| Apparent magnitude (V) | 6.5 - 9.2 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | C6.5,4e(N3) |
| Variable type | SRb |
| Astrometry | |
| Radial velocity (Rv) | 17.00 km/s |
| Proper motion (μ) | RA: 0.039 mas/yr Dec.: −4.532 mas/yr |
| Parallax (π) | 1.5006±0.0592 mas |
| Distance | 2,170 ± 90 ly (670 ± 30 pc) |
| Absolute magnitude (MV) | −1.1 (near max.) |
| Details | |
| Mass | 4.3 M☉ |
| Radius | 219 R☉ |
| Luminosity | 6,025 L☉ |
| Surface gravity (log g) | 0.228 cgs |
| Temperature | 3,217 K |
| Metallicity [Fe/H] | −0.106 dex |
| Other designations | |
| Y Tau, BD+20°1083, HD 38307, HIP 27181, HR 1977 | |
| Database references | |
| SIMBAD | data |
Y Tauri is a carbon star located in the constellation Taurus. Parallax measurements by Gaia put it at a distance of approximately 2,170 light-years (670 parsecs).
Y Tauri is a semiregular variable star. Its class is SRb, and its primary pulsation cycle lasts 241.5 days. No long secondary period has been identified. It has a radius of 219 R☉, an effective surface temperature of 3,217 K, and a bolometric luminosity of 4,489 L☉. Its mass is calculated to be 4.3 M☉.
Y Tauri is losing mass at 4×10−7 M☉/yr, and is surrounded by dust at a temperature of 1,900 K.