B Persei
 Location of b Persei (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Perseus |
| Right ascension | 04h 18m 14.61690s |
| Declination | +50° 17′ 43.8058″ |
| Apparent magnitude (V) | 4.52 - 4.68 |
| Characteristics | |
| Spectral type | A1III |
| B−V color index | +0.04 |
| Variable type | Ellipsoidal |
| Astrometry | |
| Radial velocity (Rv) | 19.8 ± 0.9 km/s |
| Proper motion (μ) |
RA: 45.42 ± 0.40 mas/yr Dec.: -56.72 ± 0.32 mas/yr |
| Parallax (π) | 10.40 ± 0.35mas |
| Distance | 310 ± 10 ly (96 ± 3 pc) |
| Absolute magnitude (MV) | 0.3 |
| Orbit | |
| Primary | b Persei A |
| Companion | b Persei C |
| Period (P) | 701.76 days |
| Semi-major axis (a) | 5.09 mas |
| Eccentricity (e) | 0.235 |
| Inclination (i) | 83.46° |
| Longitude of the node (Ω) | 115.29° |
| Periastron epoch (T) | 2440143.3984 |
|
Argument of periastron (ω) (secondary) |
263° |
| Details | |
| Mass | 2.25 M☉ |
| Radius | 3.2 R☉ |
| Temperature | 9000 K |
| Rotational velocity (v sin i) | 81 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
b Persei (also known as HD 26961) is a spectroscopic triple star in the constellation Perseus. Its apparent magnitude is 4.60, and it is about 320 light years away.
In addition to the primary, an A-type giant, there is a smaller and cooler companion in a 1.53 day orbit, probably an F-class star around absolute magnitude 3.0, and a more distant companion in a 702-day orbit.
...
Wikipedia