4 Persei
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 02h 02m 18.10869s[1] |
Declination | 54° 29′ 15.1488″[1] |
Apparent magnitude (V) | 5.04[2] |
Characteristics | |
Spectral type | B8III[3] |
U−B color index | -0.32[2] |
B−V color index | -0.08[2] |
Astrometry | |
Radial velocity (Rv) | -2.30[4] km/s |
Proper motion (μ) | RA: +34.32[1] mas/yr Dec.: -3.27[1] mas/yr |
Parallax (π) | 4.48 ± 0.23[1] mas |
Distance | 730 ± 40 ly (220 ± 10 pc) |
Absolute magnitude (MV) | -1.75[5] |
Details | |
Luminosity | 670[5] L☉ |
Surface gravity (log g) | 4.19[6] cgs |
Temperature | 12,230[6] K |
Metallicity [Fe/H] | +0.30[6] dex |
Rotational velocity (v sin i) | 60[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
4 Persei (4 Per) is a class B8III[3] (blue giant) star in the constellation Perseus. Its apparent magnitude is 5.04[2] and it is approximately 730 light years away based on parallax.[1]
References
- 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- 1 2 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 . doi:10.1134/S1063773712050015. Vizier catalog entry
- 1 2 3 Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. Bibcode:2011A&A...525A..71W. arXiv:1009.1491 . doi:10.1051/0004-6361/201015014.
- ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
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