| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03 17 47.35287 |
| Declination | +44° 01′ 30.0800″ |
| Apparent magnitude (V) | 5.49 |
| Characteristics | |
| Spectral type | B7 V |
| B−V color index | −0.060±0.004 |
| Astrometry | |
| Radial velocity (Rv) | +4.0±2.0 km/s |
| Proper motion (μ) | RA: +26.07 mas/yr Dec.: −24.47 mas/yr |
| Parallax (π) | 4.46 ± 0.39 mas |
| Distance | 730 ± 60 ly (220 ± 20 pc) |
| Absolute magnitude (MV) | −0.96 |
| Orbit | |
| 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 M☉ |
| Luminosity | 611+130 −238 L☉ |
| Temperature | 9,908 K |
| Rotational velocity (v sin i) | 212 km/s |
| Other designations | |
| 30 Per, BD+43° 674, HD 20315, HIP 15338, HR 982, SAO 38704 | |
| Database references | |
| SIMBAD | data |
30 Persei is a binary star system in the northern constellation Perseus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.49. Based upon an annual parallax shift of 4.46±0.39 mas, is located roughly 730 light years from the Sun. It is a member of the Perseus OB3 association, which includes the Alpha Persei Cluster.
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. It is spinning rapidly with a projected rotational velocity of 212 km/s. The star has 4.2 times the mass of the Sun and is radiating around 611 times the Sun's luminosity from its photosphere at an effective temperature of 9,908 K.
References
- ^ van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Morrell, Nidia; Abt, Helmut A. (July 10, 1992), "Spectroscopic binaries in the Alpha Persei cluster", Astrophysical Journal, Part 1, 393 (2): 666–673, Bibcode:1992ApJ...393..666M, doi:10.1086/171534.
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- "30 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-08.
- Hoogerwerf, Ronnie (March 2000), "OB association members in the ACT and TRC catalogues", Monthly Notices of the Royal Astronomical Society, 313 (1): 43–65, Bibcode:2000MNRAS.313...43H, doi:10.1046/j.1365-8711.2000.03192.x
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