| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 17m 47.35287s[1] |
| Declination | +44° 01′ 30.0800″[1] |
| Apparent magnitude (V) | 5.49[2] |
| Characteristics | |
| Spectral type | B7 V[3] |
| B−V color index | −0.060±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +4.0±2.0[4] km/s |
| Proper motion (μ) | RA: +26.07[1] mas/yr Dec.: −24.47[1] mas/yr |
| Parallax (π) | 4.46 ± 0.39 mas[1] |
| Distance | 730 ± 60 ly (220 ± 20 pc) |
| Absolute magnitude (MV) | −0.96[2] |
| Orbit[3] | |
| Period (P) | 36.5±0.1 d |
| Eccentricity (e) | 0.3±0.2 |
| Periastron epoch (T) | 24,407,531.7±0.1 |
| Argument of periastron (ω) (secondary) | 312±9° |
| Semi-amplitude (K1) (primary) | 20±3 km/s |
| Details | |
| 30 Per A | |
| Mass | 4.24±0.12[5] M☉ |
| Luminosity | 611+130 −238[5] L☉ |
| Temperature | 9,908[6] K |
| Rotational velocity (v sin i) | 212[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
30 Persei is a binary star[3] system in the northern constellation Perseus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.49.[2] Based upon an annual parallax shift of 4.46±0.39 mas,[1] is located roughly 730 light years from the Sun. It is a member of the Perseus OB3 association, which includes the Alpha Persei Cluster.[8]
This is a single-lined spectroscopic binary star system with an orbital period of 36.5 days and an eccentricity of roughly 0.3. The visible component is a B-type main-sequence star with a stellar classification of B7 V.[3] It is spinning rapidly with a projected rotational velocity of 212 km/s.[5] The star has 4.2[5] times the mass of the Sun and is radiating around 611[5] times the Sun's luminosity from its photosphere at an effective temperature of 9,908 K.[6]
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