10 Cassiopeiae
Star in the constellation Cassiopeia
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10 Cassiopeiae (10 Cas) is a blue-white giant star in the constellation Cassiopeia, about 960 light years away.
Right ascension00h 06m 26.5374s[2]
Declination+64° 11â² 46.169â³[2]
Apparentmagnitude(V)5.54 - 5.59[3]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 00h 06m 26.5374s[2] |
| Declination | +64° 11â² 46.169â³[2] |
| Apparent magnitude (V) | 5.54 - 5.59[3] |
| Characteristics | |
| Spectral type | B9IIIe[3] |
| UâB color index | â0.19[4] |
| BâV color index | â0.03[4] |
| Variable type | suspected Be[3] |
| Astrometry | |
| Radial velocity (Rv) | â0.61±0.54[2] km/s |
| Proper motion (μ) | RA: +9.248[2] mas/yr Dec.: +0.828[2] mas/yr |
| Parallax (Ï) | 3.4070±0.0536 mas[2] |
| Distance | 960 ± 20 ly (294 ± 5 pc) |
| Absolute magnitude (MV) | â1.863[5] |
| Details | |
| Mass | 3.2[6] Mâ |
| Radius | 8.3[7] Râ |
| Luminosity | 920[8] Lâ |
| Surface gravity (log g) | 2.08[6] cgs |
| Temperature | 11,351[8] K |
| Metallicity [Fe/H] | â0.01[5] dex |
| Rotation | 1.07 d[9] |
| Rotational velocity (v sin i) | 125[8] km/s |
| Age | 218[10] Myr |
| Other designations | |
| 10 Cas, HR 7, HD 144, BD+63°2107, HIP 531, NSV 15021, MWC 2 | |
| Database references | |
| SIMBAD | data |
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.