Asteria — interactive night sky map
Algol (Beta Persei) is a star in the constellation Perseus with an apparent magnitude of 2.09. It lies about 90 light-years from Earth. It is visible to the naked eye under dark skies.
It is best placed in the evening sky around November. It is visible from the whole northern hemisphere and from southern latitudes down to about 49°S. It is circumpolar (never sets) north of latitude 49°N.