S Crucis is a star in the constellation Crux. A Cepheid variable, its apparent magnitude ranges from 6.22 to 6.92 over 4.68997 d. It is a yellow-white supergiant that pulsates between spectral types F6Ib-II and G1Ib-II.
S Crucis is a pulsating variable star of the δ Cephei type, a Classical Cepheid variable. Its mean radius is 37.9 R☉ and that radius varies by up to 4.1 R☉ during its 4.7-day pulsation cycle. Over the same cycle, the effective temperature varies between 5,517 K and 6,482 K. The star is thought to be 116 million years old; it has exhausted its core hydrogen and left the main sequence.
References
Watson, Christopher (4 January 2010). "S Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 March 2014. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10770 ↩
Watson, Christopher (4 January 2010). "S Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 March 2014. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10770 ↩
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