S Vulpeculae starA type of long-period variable consisting of a yellow giant or supergiant that behaves like a Cepheid variable most of the time but occasionally goes through phases when it becomes erratic and unpredictable. S Vulpeculae itself has a period of 68.5 days. Related entry• variable starsRelated category• TYPES OF STARAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |