By IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) [CC-BY-3.0], via Wikimedia Commons
"The Arrow"
By IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) [CC-BY-3.0], via Wikimedia Commons
Abbreviation: Sge
Genitive: Sagittae
Constellation family: Hercules
Nearest constellations: Aquila, Delphinus, Hercules,
and Vulpecula
Right ascension: 19.67h
Declination: 17.81°
Visible between latitudes: +90° and -70°
Square degrees: 80
Luminary: Gamma Sagittae
Named stars: Sham
Notable deep sky objects: M71, NGC 6839
Sagitta is located in the Northern Hemisphere and is visible in September.
Sagitta is the third-smallest constellation in the sky. The only constellations that are smaller than Sagitta are Crux and Equuleus.
There is no widely-recognized myth associated with Sagitta. Some sources describe the constellation as representing the arrow that Hercules (also known as Heracles) used to kill the raptor that repeatedly tore out the liver of Prometheus; Prometheus was subjected to this eternal punishment for giving the gift of fire to humanity.
However, other sources describe Sagitta as being an arrow shot by Sagittarius, while there are further references citing Cupid's arrow as a source of the mythology behind the constellation.
M71 (globular cluster):
By NASA, STScI, WikiSky (WikiSky's snapshot tool) [Public domain], via Wikimedia Commons
NGC 6886 (planetary nebula):
By ESA/Hubble & NASA [CC-BY-3.0], via ESA/Hubble