Tagyeta
Tagyeta is a double star in the constellation of Taurus and a member of the Pleiades open star cluster (M45).
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 45m 12.49578s |
| Declination | 24° 28′ 02.2097″ |
| Apparent magnitude (V) | 4.30 |
| Characteristics | |
| Spectral type | B6IV + ? |
| U−B color index | -0.48 |
| B−V color index | -0.12 |
| Astrometry | |
| Radial velocity (Rv) | 10.1 km/s |
| Proper motion (μ) | RA: 21.24 ± 0.38 mas/yr Dec.: -40.56 ± 0.35 mas/yr |
| Parallax (π) | 7.97 ± 0.33 mas |
| Distance | 440 ly (135 pc) |
| Details | |
| Tagyeta | |
| Mass | 4.5 M☉ |
| Luminosity | 600 L☉ |
| 19 Tauri Ab | |
| Mass | 3.2 M☉ |
| Luminosity | 150 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
It consists of a binary pair designated 19 Tauri A together with a single star visual companion, 19 Tauri B. 'A's' two components are themselves designated 19 Tauri Aa (officially named Taygeta /teɪˈɪdʒətə/, the traditional name for the entire system) and Ab.
Based on parallax measurements obtained during the Hipparcos mission, 19 Tauri A is approximately 440 light-years from the Sun.
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