Alpha Sculptoris
  | |
| Observation data EpochJ2000.0EquinoxJ2000.0 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h58m36.35930s[1] |
| Declination | −29° 21′ 26.8247″[1] |
| Apparent magnitude(V) | +4.30[2] |
| Characteristics | |
| Spectral type | B7 IIIp[3] |
| U−Bcolor index | −0.515[4] |
| B−Vcolor index | −0.155[4] |
| Variable type | SX Ari[5] |
| Astrometry | |
| Radial velocity(Rv) | +10.2[2]km/s |
| Proper motion(μ) | RA:+20.13[1]mas/yr Dec.:+5.31[1]mas/yr |
| Parallax(π) | 4.20 ± 0.18mas[1] |
| Distance | 780 ± 30ly (240 ± 10pc) |
| Absolute magnitude(MV) | −2.58[6] |
| Details | |
| Mass | 5.01[7]M☉ |
| Radius | 7.52[8]R☉ |
| Luminosity | 1,549[7]L☉ |
| Surface gravity(logg) | 3.20[9]cgs |
| Temperature | 13,600[9]K |
| Metallicity[Fe/H] | 0.90[10]dex |
| Rotational velocity(vsini) | 17[9]km/s |
| Age | 93[7]Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Alpha Sculptoris,Latinizedfrom α Sculptoris, is theBayer designationfor a blue-whitestarin the southernconstellationofSculptor.It has anapparent visual magnitudeof +4.30,[2]which makes it thebrightest starin this generally faint constellation.Parallaxmeasurements collected during theHipparcosmission provide a distance estimate for this star, placing it at roughly 780light-years(240parsecs), with a 4%margin of error.[1]
Alpha Sculptoris is aB-typegiant star.It is classified as anSX Arietis typevariable starand its magnitude varies by less than a tenth of a magnitude.[5]
Theluminosityof α Scl is around 1,500 times that of theSunwhile its surface temperature is 13,600K.The radius of Alpha Sculptoris is calculated to be seven times solar while itsmassis five times that of the Sun.
References
[edit]- ^abcdefvan 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.S2CID18759600.
- ^abcWielen, R.; et al. (1999). "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions".Veröff. Astron. Rechen-Inst. Heidelb.35(35). Astronomisches Rechen-Institut Heidelberg: 1.Bibcode:1999VeARI..35....1W.
- ^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.
- ^abGutierrez-Moreno, Adelina; et al. (1966). "A System of photometric standards".Publ. Dept. Astron. Univ. Chile.1.Publicaciones Universidad de Chile, Department de Astronomy: 1–17.Bibcode:1966PDAUC...1....1G.
- ^abSamus, 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.S2CID119257644.
- ^abcKochukhov, 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.S2CID18596834.
- ^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.
- ^abcSaffe, 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.S2CID119261402.
- ^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.
- ^"alf Scl".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2012-04-08.
