Alpha Sculptoris
Alpha Sculptoris is the brightest star in the generally faint constellation Sculptor, it is the brightest star in the constellation because it has an apparent visual magnitude of +4.30.[1] Parallax measurements collected during the Hipparcos mission give an estimated distance for this star at about 780 light-years (240 parsecs), with a 4% margin of error.[2]
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 58m 36.35930s[2] |
| Declination | -29° 21′ 26.8247″[2] |
| Apparent magnitude (V) | +4.30[1] |
| Characteristics | |
| Spectral type | B7 IIIp[3] |
| U−B color index | −0.515[4] |
| B−V color index | −0.155[4] |
| Variable type | SX Ari[5] |
| Astrometry | |
| Radial velocity (Rv) | +10.2[1] km/s |
| Proper motion (μ) | RA: +20.13[2] mas/yr Dec.: +5.31[2] mas/yr |
| Parallax (π) | 4.20 ± 0.18[2] mas |
| Distance | 780 ± 30 ly (240 ± 10 pc) |
| Absolute magnitude (MV) | −2.58[6] |
| Details | |
| Mass | 5.01[7] M☉ |
| Radius | 7.52[8] R☉ |
| Luminosity | 1,549[7] L☉ |
| Surface gravity (log g) | 3.20[9] cgs |
| Temperature | 13,600[9] K |
| Metallicity [Fe/H] | 0.90[10] dex |
| Rotational velocity (v sin i) | 17[9] km/s |
| Age | 93[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Alpha Sculptoris is a B-type giant star. It is classified as an SX Arietis type variable star. It's magnitude changes by less than a tenth of a magnitude.[5]
The luminosity of Alpha Sculptoris is about 1,500 times brighter than that of the Sun and is very hot with a surface temperature of 13,600 K. It is 7 times larger than the Sun in radius and is 5 times massive than the Sun.
References
- ↑ 1.0 1.1 1.2 Wielen, R.; et al. (1999). "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions". Veröff. Astron. Rechen-Inst. Heidelb. Astronomisches Rechen-Institut Heidelberg. 35 (35): 1. Bibcode:1999VeARI..35....1W.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F. (November 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.
- ↑ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
- ↑ 4.0 4.1 Gutierrez-Moreno, Adelina; et al. (1966). "A System of photometric standards". Publ. Dept. Astron. Univ. Chile. Publicaciones Universidad de Chile, Department de Astronomy. 1: 1–17. Bibcode:1966PDAUC...1....1G.
- ↑ 5.0 5.1 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ↑ 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.
- ↑ 7.0 7.1 7.2 Kochukhov, O.; Bagnulo, S. (2006). "Evolutionary state of magnetic chemically peculiar stars". Astronomy and Astrophysics. 450 (2): 763. arXiv:astro-ph/0601461. Bibcode:2006A&A...450..763K. doi:10.1051/0004-6361:20054596. S2CID 18596834.
- ↑ Shulyak, D.; Paladini, C.; Causi, G. Li; Perraut, K.; Kochukhov, O. (2014). "Interferometry of chemically peculiar stars: Theoretical predictions versus modern observing facilities". Monthly Notices of the Royal Astronomical Society. 443 (2): 1629. arXiv:1406.6093. Bibcode:2014MNRAS.443.1629S. doi:10.1093/mnras/stu1259.
- ↑ 9.0 9.1 9.2 Saffe, C.; Levato, H. (2014). "On the nature of sn stars. I. A detailed abundance study". Astronomy & Astrophysics. 562: A128. arXiv:1401.5764. Bibcode:2014A&A...562A.128S. doi:10.1051/0004-6361/201322091. S2CID 119261402.
- ↑ Schmitt, A. (March 1973). "The weak-helium-line star α Sculptoris. I. The line-spectrum". Astronomy and Astrophysics Supplement. 9: 427. Bibcode:1973A&AS....9..427S.
- ↑ Template:Cite simbad