Praecipua

in Wikipedia, die vrye ensiklopedie
(Aangestuur vanaf 46 Leonis Minoris)
Praecipua
Praecipua se ligging (in die rooi sirkel).
Sterrebeeld Klein Leeu
Spektraaltipe K0+ III-IV[1]
Waarnemingsdata (Epog J2000)
Regte klimming 10h 53m 18.70487s[2]
Deklinasie +34° 12′ 53.5375″[2]
Skynmagnitude (m) 3,83[3] (3,79-3,84[4])
Absolute magnitude (M) 1,45[5]
Besonderhede
Massa (M☉) 1,69[6]
Radius (R☉) 8,22 ± 0,22[3]
Ligsterkte (L☉) 34 ± 2[3]
Ouderdom (jaar) 6,76 miljard[7]
Temperatuur (K) 4 670[3]
Afstand (ligjaar) 95
Rotasiespoed (km/s) 1,81[8]
Metaalinhoud [Fe/H] -0.2[9]
Eienskappe
Veranderlikheid Vermoedelik
Ander name
BD+34 2172, FK5 412, HD 94264, HIP 53229, HR 4247, SAO 62297
Portaal  Portaalicoon   Sterrekunde

Praecipua (ook bekend as 46 Leonis Minoris of 46 LMi) is die helderste ster in die sterrebeeld Klein Leeu (Leo Minor). Sy sterreklassifikasie is K0+III-IV, wat aandui dit is ’n rooireus of subreus, en dit het ’n skynbare magnitude van 3,83. Dit is sowat 95 ligjare van die Son af. Dit is vermoedelik ’n veranderlike ster met ’n wisseling van omtrent 0,05 magnitudes.[4]

Naam[wysig | wysig bron]

"46 Leonis Minoris" is die ster se Flamsteed-naam. Dit het die tradisionele naam "Praecipua", van die Latyn vir "die hoof(ster van die Klein Leeu)".[10] Die naam was dalk oorspronklik dié van 37 Leonis Minoris wat later verkeerdelik aan 46 Leonis Minoris gegee is.[11] Die Internasionale Astronomiese Unie se sternaamwerkgroep (WGSN)[12] het die naam op 30 Junie 2017 amptelik vir dié ster goedgekeur.[13]

Verwysings[wysig | wysig bron]

  1. ↑ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  2. ↑ 2,0 2,1 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V 
  3. ↑ 3,0 3,1 3,2 3,3 Piau, L. et al. (Februarie 2011), "Surface convection and red-giant radius measurements", Astronomy and Astrophysics 526: A100, doi:10.1051/0004-6361/201014442, Bibcode: 2011A&A...526A.100P 
  4. ↑ 4,0 4,1 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. Oorpronklik gepubliseer in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  5. ↑ Mullan, D. J.; MacDonald, J. (2003). "Onset of Mass Loss in Red Giants: Association with an Evolutionary Event". The Astrophysical Journal. 591 (2): 1203. Bibcode:2003ApJ...591.1203M. doi:10.1086/375446.
  6. ↑ Lyubimkov, L. S.; Poklad, D. B. (2014). "Determining the effective temperatures of G- and K-type giants and supergiants based on observed photometric indices". Kinematics and Physics of Celestial Bodies. 30 (5): 244. arXiv:1412.6950. Bibcode:2014KPCB...30..244L. doi:10.3103/S0884591314050055.
  7. ↑ Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics. 480: 91. arXiv:0712.1370. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788.
  8. ↑ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics. 475 (3): 1003. arXiv:0709.1145. Bibcode:2007A&A...475.1003H. doi:10.1051/0004-6361:20078233.
  9. ↑ Wittenmyer, Robert A.; Gao, Dongyang; Hu, Shao Ming; Villaver, Eva; Endl, Michael; Wright, Duncan (2015). "The Weihai Observatory Search for Close-in Planets Orbiting Giant Stars". Publications of the Astronomical Society of the Pacific. 127 (956): 1021. arXiv:1507.06051. Bibcode:2015PASP..127.1021W. doi:10.1086/683258.
  10. ↑ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Herdruk uitg.). New York, NY: Dover Publications Inc. p. 264. ISBN 0-486-21079-0.
  11. ↑ Leo Minor: The little lion- Ian Ridpath's Star Tales
  12. ↑ "IAU Working Group on Star Names (WGSN)" (in Engels). Geargiveer vanaf die oorspronklike op 13 Mei 2020. Besoek op 22 Mei 2016.
  13. ↑ "Naming Stars" (in Engels). IAU.org. Geargiveer vanaf die oorspronklike op 13 Mei 2020. Besoek op 16 Desember 2017.

Eksterne skakels[wysig | wysig bron]

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