Perseus

Perseus, the Hero, is a northern constellation named after the Greek hero who slew Medusa. It contains Algol (Beta Persei), the most famous eclipsing binary star, whose regular brightness variations were noted by ancient astronomers. The constellation is the radiant of the Perseid meteor shower, one of the most popular annual meteor showers, peaking in August.

The Perseus family groups constellations connected by the Greek myth of Perseus, the hero who slew Medusa and rescued Andromeda. This family includes some of the most prominent autumn constellations in the northern sky. The constellations tell a connected story: King Cepheus and Queen Cassiopeia of Ethiopia, their daughter Andromeda chained to a rock, the hero Perseus arriving on Pegasus, and Cetus the sea monster — all placed in the sky as a complete mythological tableau.

Mythology & History

The Perseus myth is one of the most complete stories preserved in the constellations. Cassiopeia's boast that she was more beautiful than the sea nymphs angered Poseidon, who sent Cetus to ravage the coast. The oracle declared Andromeda must be sacrificed, but Perseus — fresh from beheading Medusa — turned the monster to stone with the Gorgon's head. Perseus married Andromeda, and all the characters were later placed among the stars. The variable star Algol (Beta Persei) was associated with Medusa's winking eye, and its regular brightness changes were noted by ancient Egyptian astronomers as early as 1244 BC.

Observation Tips

The Perseus family constellations are best seen in autumn and winter from northern latitudes. Cassiopeia's distinctive W-shape is circumpolar from mid-northern latitudes and serves as a guide to finding the other family members. This region is exceptionally rich: the Andromeda Galaxy (M31) — the most distant object visible to the naked eye — lies in Andromeda, the Double Cluster (NGC 869/884) straddles Perseus, and the annual Perseid meteor shower (peaking in August) appears to radiate from Perseus.

HIP 12638HIP 12643HIP 12645HIP 12648HIP 12652HIP 12659HIP 12662HIP 12663HIP 12676HIP 12678HIP 12680HIP 12684HIP 12686HIP 12690HIP 12704HIP 14297HIP 14300HIP 17800HIP 17807HIP 17811HIP 12753HIP 12861HIP 12866HIP 12873HIP 12886HIP 12984HIP 12990HIP 13062HIP 13104HIP 13123HIP 13155HIP 13160HIP 13206HIP 13226HIP 13252HIP 13259HIP 13262HIP 13264HIP 13266HIP 13275HIP 13282HIP 13284HIP 13287HIP 13300HIP 13311HIP 13319HIP 1332211 Per

Frequently Asked Questions

What is the Perseus constellation?
Perseus (Per) is one of the 88 IAU-recognized constellations in the Northern hemisphere. Perseus, the Hero, is a northern constellation named after the Greek hero who slew Medusa. It contains Algol (Beta Persei), the most famous eclipsing binary star, whose regular brightness variations w
How many stars are cataloged in Perseus?
StarFYI currently catalogs 2,000 stars in the constellation Perseus.
What is the brightest star in Perseus?
The brightest star in Perseus is Mirfak.
How large is the Perseus constellation?
Perseus covers 614.99 square degrees of the sky.
What family does Perseus belong to?
Perseus belongs to the Perseus Family of constellations.