Constellation Equuleus, meaning "Little Horse" lies in the Northern Hemisphere's fourth quadrant (NQ4). Equuleus was first popularized by Greek astronomer Ptolemy in the 2nd century.
Because Equuleus rises just before the constellation Pegasus, it's sometimes also known as EQUUS PRIMUS, or "First Horse."
Equuleus’ brightest star is KITALPHA /alpha Equulei/ (m+3.919) Its nearest star, HD 200779, is 48 light years from Earth. Constellation Equuleus contains three stars with known exo-planets: HD 200964 (spectral class K0IV) has two Jupiter-sized planets, while stars WASP-90 (F6) and HAT-P-65 (G2) each have one known transiting planet.
Equuleus, typically associated with Hippe, daughter of Chiron, was seduced by Aeolus. Afraid to tell her father she was with child, she escaped to the mountains and stayed there until she gave birth to Melanippe. When she prayed to the gods that Chiron didn't find her, she was turned into a young foal by the goddess Artemis, who then placed her amongst the stars.