Beta Cassiopeiae
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Cassiopeia |
| Right ascension | 00h 09m 10.7s |
| Declination | +59° 08′ 59″ |
| Apparent magnitude (V) | +2.28 (2.25–2.31) |
| Characteristics | |
| Spectral type | F2 III-IV |
| U-B color index | 0.11 |
| B-V color index | 0.34 |
| Variable type | Delta Scuti |
| Astrometry | |
| Radial velocity (Rv) | 11.3 km/s |
| Proper motion (μ) | RA: 523.39 mas/yr Dec.: -180.42 mas/yr |
| Parallax (π) | 69.5 ± 6.6 mas |
| Distance | 47 ± 4 ly (14 ± 1 pc) |
| Absolute magnitude (MV) | +1.16 |
| Details | |
| Mass | 2 M☉ |
| Radius | 4 R☉ |
| Luminosity | 28 L☉ |
| Temperature | 6,700 K |
| Metallicity | ? |
| Rotation | 70 km/s. |
| Age | ? years |
| Other designations | |
Beta Cassiopeiae (β Cas / β Cassiopeiae) is a Delta Scuti variable star in the constellation Cassiopeia. It also has the traditional name Caph, from the Arabic word كف kaf, "palm" (i.e. reaching from the Pleiades), also known as al-Sanam al-Nakah.
β Cassiopeiae is a yellow-white F-type giant with a mean apparent magnitude of +2.28. It is classified as a Delta Scuti type variable star and its brightness varies from magnitude +2.25 to +2.31 with a period of 2.5 hours.
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