S Crucis

<p>S Crucis is a <a href="/facts/Star/PFbd6ICx">star</a> in the <a href="/facts/Constellation/nBQqgW8A">constellation</a> <a href="/facts/Crux/Btht6rAc">Crux</a>. A <a href="/facts/Cepheid_variable/WQXaAFmW">Cepheid variable</a>, its <a href="/facts/Apparent_magnitude/7pCTF1Me">apparent magnitude</a> ranges from 6.22 to 6.92 over 4.68997 <a href="/facts/Day/MTAtWLDj">d</a>. It is a yellow-white supergiant that pulsates between spectral types F6Ib-II and G1Ib-II.
</p><p>S Crucis is a <a href="/facts/Pulsating_variable_star/Ac8mp2gy">pulsating variable star</a> of the <a href="/facts/%25CE%2594_Cephei/5ofxXw9M">δ Cephei</a> type, a Classical Cepheid variable.  Its <a href="/facts/Mean/swcEd4Pg">mean</a> radius is 37.9 <a href="/facts/Solar_radius/5t1Xavju">R☉</a> and that radius varies by up to 4.1 R☉ during its 4.7-day pulsation cycle.  Over the same cycle, the <a href="/facts/Effective_temperature/RY30DaSY">effective temperature</a> varies between 5,517 <a href="/facts/Kelvin/E3trzC4C">K</a> and 6,482 K.  The star is thought to be 116 million years old; it has exhausted its core hydrogen and left the <a href="/facts/Main_sequence/DJ3Wq8kd">main sequence</a>.
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S Crucis open-in-new

S Crucis