10 Cassiopeiae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 00h 06m 26.5374s |
| Declination | +64° 11′ 46.169″ |
| Apparent magnitude (V) | 5.54 - 5.59 |
| Characteristics | |
| Spectral type | B9IIIe |
| U−B color index | −0.19 |
| B−V color index | −0.03 |
| Variable type | suspected Be |
| Astrometry | |
| Radial velocity (Rv) | −0.61±0.54 km/s |
| Proper motion (μ) | RA: +9.248 mas/yr Dec.: +0.828 mas/yr |
| Parallax (π) | 3.4070±0.0536 mas |
| Distance | 960 ± 20 ly (294 ± 5 pc) |
| Absolute magnitude (MV) | −1.863 |
| Details | |
| Mass | 3.2 M☉ |
| Radius | 8.3 R☉ |
| Luminosity | 920 L☉ |
| Surface gravity (log g) | 2.08 cgs |
| Temperature | 11,351 K |
| Metallicity [Fe/H] | −0.01 dex |
| Rotation | 1.07 d |
| Rotational velocity (v sin i) | 125 km/s |
| Age | 218 Myr |
| Other designations | |
| 10 Cas, HR 7, HD 144, BD+63°2107, HIP 531, NSV 15021, MWC 2 | |
| Database references | |
| SIMBAD | data |
10 Cassiopeiae (10 Cas) is a blue-white giant star in the constellation Cassiopeia, about 960 light years away.
10 Cassiopeiae is a B9 giant star. It shows emission lines in its spectrum and is classified as a Be star. It shows slight variations in its brightness, between magnitudes 5.54 and 5.59.
At an age of 218 million years, 10 Cassiopeiae has expanded away from the main sequence after exhausting its core hydrogen and now has a radius about eight times that of the Sun. With an effective temperature of about 11,000 K, it emits nearly a thousand times the luminosity of the Sun.