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A faint star in the extreme south and west of the constellation Perseus, lying southward of bright Algol in that constellation. 17 Persei falls close to the point where Perseus borders its neighbouring constellation of Triangulum, the Triangle.

Though 17 Persei is faint in the skies of Earth, this is due to its considerable distance of nearly 470 light years from the Solar System. It is in fact an intensely luminous orange giant star, more than fifty times the Sun's diameter, and emitting more than 250 times as much light energy. At a distance of ten parsecs (the standard distance used to calculate absolute magnitude) it would shine nearly as brightly as the Dog Star Sirius, and outshine all the other stars in the sky.

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