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Stella di classe B V

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Regolo è la stella più brillante dell'immagine. La debole macchia chiara al centro è la galassia nana sferoidale UGC 5470.

Una stella di classe B V (o stella azzurra di sequenza principale o stella B V, in passato nana bianco-azzurra) è una stella di sequenza principale (ovvero che nel proprio nucleo fonde l'idrogeno in elio) di classe spettrale B e classe di luminosità V (5 in numeri romani).

Tali stelle hanno una massa compresa tra 2 e 16 masse solari e temperature superficiali comprese tra 10000 e 30000 K.[1]

A questa categoria stellare appartiene un numero cospicuo di astri, tra cui Regolo, Algol A e Spica B.[2]

  1. ^ G. M. H. J. Habets, J. R. W. Heintze, Empirical bolometric corrections for the main-sequence, in Astronomy and Astrophysics Supplement, n. 46, novembre 1981, pp. 193–237.
  2. ^ SIMBAD, entries on Regulus and Algol A, accessed June 19, 2007.

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Stella di classe B V
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