Back الوزن (قنطورس) Arabic Hadar (estrella) AST B Sentavr Azerbaijani Beta Centauri BAN Хадар Byelorussian Beta Centauri BS Hadar Catalan Hadar Czech Beta Centauri German Χαντάρ (αστέρας) Greek

Beta Centauri

Beta Centauri
Die ligging van Beta Centauri (in die rooi sirkel).
Die ligging van Beta Centauri (in die rooi sirkel).
Sterrebeeld Sentour
Spektraaltipe B1 III / B1 III / B1V?[1]
Soort Veelvoudige ster
Waarnemingsdata (Epog J2000)
Regte klimming 14h 03m 49.40535s[2]
Deklinasie -60° 22′ 22.9266″[2]
Skynmagnitude (m) 0,61[3]
Absolute magnitude (M) -4,53[4]
B-V-kleurindeks  -0,23[3]
U-B-kleurindeks  -0,98[3]
Besonderhede
Massa (M☉) 10,7 ± 0,1 / 10,3 ± 0,1[1] / 4,61[5]
Ligsterkte (L☉) 41 700[6]
Ouderdom (jaar) 14,1 ± 0,6[1]
Temperatuur (K) 25 000 ± 2 000 (A1)/
25 000 ± 2 000[1] (A2)
Eienskappe
Veranderlikheid β Cep (A1 & A2)[7]
Ander name
Agena, Hadar,[8] HR 5267, HD 122451, CD−59°5365, LHS 51, SAO 252582, FK5 518, HIP 68702, GC 18971, CCDM J14038-6022[9]
Portaal  Portaalicoon   Sterrekunde

Beta Centauri (β Centauri, afgekort as Beta Cen of β Cen), met die tradisionele naam Hadar,[10] is ’n driedubbele ster in die suidelike sterrebeeld Sentour (Centaurus). Die stelsel se gesamentlike skynbare magnitude van 0,61 maak dit die tweede helderste ster in Sentour en een van die helderste sterre in die naglug. Volgens metings van die Hipparcos-satelliet[11][12] is dit sowat 390 ligjare van die Son af.[2]

Beta Centauri is goed in die Suidelike Halfrond bekend as die binneste van twee sterre wat wys na die asterisme bekend as die Suiderkruis. ’n Lyn wat van die ander aanwyser, Alpha Centauri, deur Beta Centauri getrek word, lei na binne ’n paar grade van Gamma Crucis, die ster aan die bopunt van die kruis. Deur ’n lyn van dié ster af te trek na Alpha Crucis aan die onderkant van die kruis, kan ’n navigator vasstel waar suid is.[13]

  1. ↑ 1,0 1,1 1,2 1,3 Ausseloos, M.; Aerts, C.; Lefever, K.; Davis, J.; Harmanec, P. (Augustus 2006). "High-precision elements of double-lined spectroscopic binaries from combined interferometry and spectroscopy. Application to the β Cephei star β Centauri". Astronomy and Astrophysics. 455 (1): 259–269. arXiv:astro-ph/0605220. Bibcode:2006A&A...455..259A. doi:10.1051/0004-6361:20064829.
  2. ↑ 2,0 2,1 2,2 van Leeuwen (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.
  3. ↑ 3,0 3,1 3,2 Hoffleit, Dorrit; Jaschek, Carlos (1991). "The Bright star catalogue". New Haven, Conn.: Yale University Observatory, 5th rev.ed. Bibcode:1991bsc..book.....H.
  4. ↑ Davis, J.; Mendez, A.; Seneta, E. B.; Tango, W. J.; Booth, A. J.; O'Byrne, J. W.; Thorvaldson, E. D.; Ausseloos, M.; Aerts, C.; Uytterhoeven, K. (2005). "Orbital parameters, masses and distance to β Centauri determined with the Sydney University Stellar Interferometer and high-resolution spectroscopy". Monthly Notices of the Royal Astronomical Society. 356 (4): 1362. arXiv:astro-ph/0411054. Bibcode:2005MNRAS.356.1362D. doi:10.1111/j.1365-2966.2004.08571.x.
  5. ↑ Tokovinin, A. A. (1999). "VizieR Online Data Catalog: Multiple star catalogue (MSC) (Tokovinin 1997-1999)". VizieR On-line Data Catalog: J/A+AS/124/75. Oorspronklik gepubliseer in: 1997A&AS..124...75T. 412: 40075. Bibcode:1999yCat..41240075T.
  6. ↑ Raassen, A. J. J.; Cassinelli, J. P.; Miller, N. A.; Mewe, R.; Tepedelenlioǧlu, E. (Julie 2006). "XMM-Newton observations of β Centauri (B1 III): The temperature structure in the hot plasma and the photosphere-wind connection". Astronomy and Astrophysics. 437 (2): 599–609. Bibcode:2005A&A...437..599R. doi:10.1051/0004-6361:20052650.
  7. ↑ Ausseloos, M.; Aerts, C.; Uytterhoeven, K.; Schrijvers, C.; Waelkens, C.; Cuypers, J. (2002). "Beta Centauri: An eccentric binary with two beta Cep-type components". Astronomy and Astrophysics. 384: 209. Bibcode:2002A&A...384..209A. doi:10.1051/0004-6361:20020004.
  8. ↑ Allen, R. H. (1963), Star Names: Their Lore and Meaning (Reprint ed.), New York: Dover Publications Inc, p. 154, ISBN 0-486-21079-0, http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Centaurus*.html, besoek op 2010-12-12 
  9. ↑ "V* bet Cen -- Variable Star of beta Cep type". SIMBAD (in Engels). Centre de Données astronomiques de Strasbourg. Geargiveer vanaf die oorspronklike op 13 April 2016. Besoek op 19 Desember 2011.
  10. ↑ "IAU Catalog of Star Names" (in Engels). Geargiveer vanaf die oorspronklike op 29 Mei 2020. Besoek op 28 Julie 2016.
  11. ↑ Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J. (Julie 1997). "The Hipparcos Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
  12. ↑ Perryman, Michael (2010), "The Making of History's Greatest Star Map", The Making of History's Greatest Star Map:, Astronomers’ Universe (Heidelberg: Springer-Verlag), doi:10.1007/978-3-642-11602-5, ISBN 978-3-642-11601-8, Bibcode: 2010mhgs.book.....P 
  13. ↑ Kyselka, Will; Lanterman, Ray E. (1976). North Star to Southern Cross. p. 59. Bibcode:1976nsts.book.....K. ISBN 0-8248-0419-8. {{cite book}}: |journal= ignored (hulp)
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