10 Persei
Blue supergiant star in the constellation Perseus
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10 Persei is a blue supergiant star in the constellation Perseus. Its apparent magnitude is 6.26 although it is slightly variable.
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 25m 16.02834s[1] |
| Declination | +56° 36′ 35.3544″[1] |
| Apparent magnitude (V) | 6.26[2] |
| Characteristics | |
| Evolutionary stage | Blue supergiant |
| Spectral type | B2Ia[3] |
| U−B color index | −0.61[2] |
| B−V color index | +0.30[2] |
| Variable type | α Cyg[4] |
| Astrometry | |
| Radial velocity (Rv) | −39.87±1.93[1] km/s |
| Proper motion (μ) | RA: −0.508 mas/yr[1] Dec.: −1.182 mas/yr[1] |
| Parallax (π) | 0.4424±0.0263 mas[1] |
| Distance | 7000±815 ly (2,150±250 pc)[5] |
| Absolute magnitude (MV) | −6.70[6] |
| Details[5] | |
| Mass | 23.6±1.9 M☉ |
| Radius | 49±6 R☉ |
| Luminosity | 257,000 L☉ |
| Surface gravity (log g) | 2.45±0.07 cgs |
| Temperature | 18,600±300 K |
| Rotational velocity (v sin i) | 48±6 km/s |
| Age | 7.76 Myr |
| Other designations | |
| V554 Persei, HR 696, HD 14818, BD+55°612, HIP 11279, SAO 23304, GC 2885 | |
| Database references | |
| SIMBAD | data |
10 Persei is located around 3,333 parsecs (10,870 ly) distant in the Perseus OB1 stellar association. It lies close to the Double Cluster and is considered a cluster member.[7]
In 1999, 10 Persei was given the variable star designation V554 Persei, after being identified as varying in Hipparcos photometry.[9] Its brightness varies by less than a tenth of a magnitude with no clear period.[4]