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Hercules

Constellation of the northern sky

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GenitiveHerculis
AbbreviationHer
Right Ascension15h47 to 18h56
Declination+3.9° to +51.3°
Area (sq deg)1,225
Brightest StarRas Algethi and Rutilicus (variable stars with almost identical maximum magnitudes)
Optimum VisibilityJune
Map of Hercules

A large constellation of the northern sky, particularly noted for the Globular Cluster M13.

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