Chi Cassiopeiae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cassiopeia |
| Right ascension | 01h 25m 56.02238s |
| Declination | +68° 07′ 48.0460″ |
| Apparent magnitude (V) | +4.696 |
| Characteristics | |
| Evolutionary stage | red clump |
| Spectral type | G9 IIIb |
| U−B color index | +0.762 |
| B−V color index | +0.997 |
| Astrometry | |
| Radial velocity (Rv) | +6.66±0.14 km/s |
| Proper motion (μ) | RA: −43.03±0.34 mas/yr Dec.: −22.31±0.32 mas/yr |
| Parallax (π) | 15.67±0.39 mas |
| Distance | 208 ± 5 ly (64 ± 2 pc) |
| Absolute magnitude (MV) | +0.52 |
| Details | |
| Mass | 2.04 M☉ |
| Radius | 10.27±0.32 R☉ |
| Luminosity | 67.6 L☉ |
| Surface gravity (log g) | 2.21 cgs |
| Temperature | 4,746 K |
| Metallicity [Fe/H] | −0.34 dex |
| Rotational velocity (v sin i) | 0.44±0.45 km/s |
| Age | 1.0 Gyr |
| Other designations | |
| χ Cas, 39 Cas, BD+58°260, HD 9408, HIP 7294, HR 442, SAO 22397 | |
| Database references | |
| SIMBAD | data |
Chi Cassiopeiae (χ Cassiopeiae) is a solitary, yellow-hued star in the constellation Cassiopeia. It is visible to the naked eye with an apparent visual magnitude of +4.7. Based upon an annual parallax shift of 15.67 mas as seen from Earth, this system is located roughly 208 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.18 due to interstellar dust.
With a stellar classification of G9 IIIb, it has the spectrum of an evolved, G-type giant star. It is a red clump star that it is generating energy through helium fusion at its core, with an estimated age of a billion years. The star has about double the mass of the Sun and has expanded to 10.3 times the Sun's radius. It is radiating 67.6 times the Sun's luminosity from its photosphere at an effective temperature of 4,746 K.