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 111759HIP 111845HIP 115583HIP 115627HIP 115633HIP 115699HIP 115718HIP 115745HIP 115783HIP 112120HIP 112152HIP 112191HIP 112218HIP 112250HIP 112268HIP 115829HIP 115855HIP 115896HIP 115921HIP 115927HIP 115962HIP 115969HIP 115978HIP 115986HIP 116001HIP 116005HIP 116011HIP 112288HIP 112294HIP 112299HIP 112303HIP 112335HIP 112360HIP 112371HIP 116016HIP 116054HIP 116072HIP 116098HIP 116116HIP 112461HIP 112471HIP 116265HIP 116274HIP 116277HIP 116307HIP 116341HIP 116348HIP 116351

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.