Zeta Persei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 54m 07.92143s |
| Declination | +31° 53′ 01.0869″ |
| Apparent magnitude (V) | 2.86 |
| Characteristics | |
| Evolutionary stage | Blue supergiant |
| Spectral type | B1 Ib |
| U−B color index | –0.72 |
| B−V color index | +0.10 |
| Astrometry | |
| Radial velocity (Rv) | 20.1 ± 1.2 km/s |
| Proper motion (μ) | RA: +7.274 mas/yr Dec.: –9.141 mas/yr |
| Parallax (π) | 3.8556±0.4169 mas |
| Distance | 1,300±200 ly (400±64 pc) |
| Absolute magnitude (MV) | −4.55±0.1 |
| Details | |
| Mass | 14.5 ± 1.9 M☉ |
| Radius | 26–27 R☉ |
| Luminosity | 47,039 L☉ |
| Temperature | 20,800 K |
| Rotational velocity (v sin i) | 40 km/s |
| Age | 12.6 ± 1.5 Myr |
| Other designations | |
| 44 Per, FK5 144, HD 24398, HIP 18246, HR 1203, SAO 56799 | |
| Database references | |
| SIMBAD | data |
Zeta Persei (ζ Per, ζ Persei) is a star in the northern constellation of Perseus. With an apparent visual magnitude of 2.9, it can be readily seen with the naked eye. Parallax measurements place it at a distance of about 846 light-years (259 parsecs) from Earth, though measurements of its Ca II lines place it at 1,300 light-years (400 parsecs).