Beta Centauri
Beta Centauri  (β Centauri, β Cen) vel Hadar, interdum et Agena, est stella constellationis Centauri. A Sole circa 392 annos luce mensos distat. 

Stella trinaria est. Stella systematis principalis gigas caeruleus et albus est; anno 1935  stellam alteram aperuit, quae a principali 1,3 secunda anguli distat. Periodis sidericus longior est, nam tempore observationis stellae vix moventur. Stella principalis binaria spectroscopica est; periodum sidericum 352 dies habet.

Notae

Bibliographia 
 Ausseloos, M.; Aerts, C.; Lefever, K. & Davis, J. (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 Т. 455 (1): 259–269 
 Raassen, A. J. J.; Cassinelli, J. P.; Miller, N. A. & Mewe, R. (2006), XMM-Newton observations of β Centauri (B1 III): The temperature structure in the hot plasma and the photosphere-wind connection, Astronomy and Astrophysics Т. 437 (2): 599–609

Nexus externi 

Centaurus (constellatio)
Stellae trinariae