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Equuleus, the Foal

Equ

Equulei

Sky Chart and Artist Rendering of Equuleus

Origin:
One of the 48 constellations described by Ptolemy in the Almagest (A.D. 140).

Information:
Equuleus is a late summer constellation located east of Delphinus and west of the head of Pegasus.  The Foal is among the smallest of all constellations, second only to Crux, the Southern Cross.  It is highest in the southern sky, nearly overhead (for northern observers), at 9 pm on October 28.  The constellation is very faint with no star brighter than magnitude 4.  There are no notable deep sky objects visible to amateur-sized telescopes.

Mythology:
Equuleus (also called Celeris) was the brother of the winged horse Pegasus.  Pegasus was born from the blood of the Gorgon Medusa who was decapitated by Perseus during the salvation of Andromeda from the sea monster.  Equuleus, the Foal, was given to Castor (one of the twins in Gemini born to Queen Leda, wife of the King of Sparta and one of Zeus' lovers) by Hermes (Mercury in Roman mythology).