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]
Alpha Sculptoris Media
Light curves in four photometric bands for Alpha Sculptoris, adapted from Manfroid and Renson (1994)
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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.. Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions. Veröff. Astron. Rechen-Inst. Heidelb 35 (35) (1999)Astronomisches Rechen-Institut Heidelberg. p. 1.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F.. Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2) (November 2007). p. 653–664. doi:10.1051/0004-6361:20078357.
- ↑ Houk, Nancy. Michigan catalogue of two-dimensional spectral types for the HD stars 3 (1979)Dept. of Astronomy, University of Michigan.
- ↑ 4.0 4.1 Gutierrez-Moreno, Adelina. A System of photometric standards. Publ. Dept. Astron. Univ. Chile 1 (1966)Publicaciones Universidad de Chile, Department de Astronomy. p. 1–17.
- ↑ 5.0 5.1 Samus, N. N.. 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 (2009).
- ↑ Anderson, E.. XHIP: An extended hipparcos compilation. Astronomy Letters 38 (5) (2012). p. 331. doi:10.1134/S1063773712050015.
- ↑ 7.0 7.1 7.2 Kochukhov, O.. Evolutionary state of magnetic chemically peculiar stars. Astronomy and Astrophysics 450 (2) (2006). p. 763. doi:10.1051/0004-6361:20054596.
- ↑ Shulyak, D.. Interferometry of chemically peculiar stars: Theoretical predictions versus modern observing facilities. Monthly Notices of the Royal Astronomical Society 443 (2) (2014). p. 1629. doi:10.1093/mnras/stu1259.
- ↑ 9.0 9.1 9.2 Saffe, C.. On the nature of sn stars. I. A detailed abundance study. Astronomy & Astrophysics 562 (2014). p. A128. doi:10.1051/0004-6361/201322091.
- ↑ Schmitt, A.. The weak-helium-line star α Sculptoris. I. The line-spectrum. Astronomy and Astrophysics Supplement 9 (March 1973). p. 427.
- ↑ Template:Cite simbad