Algol

• Bayer: β Persei
• Flamsteed: 26 Persei
• Gorgona; Gorgonea Prima; Demon Star; El Ghoul; Dämonenstern; Teufelsstern
• Bright Star Catalog: HR 936
• Henry Draper Catalog: HD 19356
• SAO Catalog: SAO 38592

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  The position of Beta Persei (Algol; Gorgona; Gorgonea Prima; Demon Star; El Ghoul)
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  Algol AB movie imaged with the CHARA interferometer
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  Algol and its dark companion as seen from Earth.
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  Algol and its dark companion as seen from above orbit.