| http://www.w3.org/ns/prov#value | - ?? Cas is a member of an unusual group of variable stars known as Slowly Pulsating B (SPB) stars.[10] It shows a pulsation frequency of 0.64 per day (or once every 1.56 days) and displays a weak magnetic field with a strength of roughly 3.35 ?? 10???2 T, which varies with a period of 5.37 days.[11] This likely matches the rotation rate of the star, which, when combined with the low projected rot
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