Delta Cassiopeiae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 01h 25m 48.95147s |
| Declination | +60° 14′ 07.0225″ |
| Apparent magnitude (V) | 2.68 |
| Characteristics | |
| Spectral type | A5 IV |
| U−B color index | +0.13 |
| B−V color index | +0.13 |
| Variable type | Algol? |
| Astrometry | |
| Radial velocity (Rv) | −6.7 km/s |
| Proper motion (μ) | RA: +296.57 mas/yr Dec.: −49.22 mas/yr |
| Parallax (π) | 32.81±0.14 mas |
| Distance | 99.4 ± 0.4 ly (30.5 ± 0.1 pc) |
| Absolute magnitude (MV) | +0.28 |
| Details | |
| Mass | 2.49 M☉ |
| Radius | 3.90 R☉ |
| Luminosity | 72.88 L☉ |
| Temperature | 7,980 K |
| Rotational velocity (v sin i) | 123 km/s |
| Age | 600 Myr |
| Other designations | |
| Ruchbah, Ksora, Rucba, Rucbar, 37 Cassiopeiae, BD+59°248, FK5 48, HD 8538, HIP 6686, HR 403, SAO 22268, WDS J01258+6014A | |
| Database references | |
| SIMBAD | data |
Delta Cassiopeiae (δ Cassiopeiae, abbreviated Delta Cas, δ Cas) is an eclipsing binary star system in the northern circumpolar constellation of Cassiopeia. Based on parallax measurements taken during the Hipparcos mission, it is approximately 99.4 light-years (30.5 parsecs) from the Earth.
Delta Cassiopeiae is the primary or 'A' component of a multiple star system designated WDS J01258+6014. Delta Cassiopeiae's two components are therefore designated WDS J01258+6014 Aa and Ab. Aa is officially named Ruchbah /ˈrʌkbə/, the traditional name for the system.