Pegasus

Pegasus, the Winged Horse, is a large northern constellation known for the Great Square of Pegasus asterism, formed by four bright stars that serve as a useful guide for finding other celestial objects. 51 Pegasi, a Sun-like star in this constellation, was the first solar-type star found to host an exoplanet (51 Pegasi b), a discovery that earned the 2019 Nobel Prize in Physics.

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 116382HIP 116386HIP 112645HIP 112683HIP 112802HIP 112871HIP 112952HIP 113005HIP 113029HIP 116499HIP 116523HIP 116529HIP 116552HIP 116555HIP 116627HIP 116678HIP 116688HIP 113035HIP 113099HIP 113115HIP 113124HIP 113205HIP 113207HIP 113298HIP 113302HIP 116723HIP 116780HIP 116795HIP 116798HIP 116869HIP 116923HIP 116965HIP 116972HIP 116978HIP 116985HIP 117023HIP 113311HIP 113312HIP 113317HIP 113319HIP 113321HIP 113323HIP 113333HIP 113334HIP 113335HIP 117098HIP 117126HIP 117150

Frequently Asked Questions

What is the Pegasus constellation?
Pegasus (Peg) is one of the 88 IAU-recognized constellations in the Northern hemisphere. Pegasus, the Winged Horse, is a large northern constellation known for the Great Square of Pegasus asterism, formed by four bright stars that serve as a useful guide for finding other celestial object
How many stars are cataloged in Pegasus?
StarFYI currently catalogs 2,743 stars in the constellation Pegasus.
What is the brightest star in Pegasus?
The brightest star in Pegasus is Enif.
How large is the Pegasus constellation?
Pegasus covers 1120.79 square degrees of the sky.
What family does Pegasus belong to?
Pegasus belongs to the Perseus Family of constellations.