La Superba
La Superba (Y CVn, Y Canum Venaticorum) is a strikingly red giant star in the constellation Canes Venatici. It is a carbon star and semiregular variable.
Location of Y Canum Venaticorum | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 12h 45m 07.826s |
| Declination | +45° 26′ 24.93″ |
| Apparent magnitude (V) | +4.86 to +7.32 |
| Characteristics | |
| Evolutionary stage | Asymptotic giant branch |
| Spectral type | C54J(N3) |
| U−B color index | 6.62 |
| B−V color index | 2.54 |
| V−R color index | 1.75 |
| R−I color index | 1.38 |
| Variable type | SRb |
| Astrometry | |
| Radial velocity (Rv) | 15.30 km/s |
| Proper motion (μ) | RA: −2.968 mas/yr Dec.: 13.063 mas/yr |
| Parallax (π) | 3.2222 ± 0.1744 mas |
| Distance | 1,010 ± 50 ly (310 ± 20 pc) |
| Absolute magnitude (MV) | −1.203 |
| Details | |
| Mass | 1.2 M☉ |
| Radius | 422 R☉ |
| Luminosity | 9,400 L☉ |
| Surface gravity (log g) | +0.23 cgs |
| Temperature | 2,600 - 3,200 K |
| Metallicity [Fe/H] | −0.21 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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