Summary
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]
| 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 |
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]
References edit
- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b c d 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.
- ^ a b c d e f 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.
- ^ a b 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