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Hercules Globular Cluster is a globular cluster in the constellation Hercules. It shines at apparent magnitude 5.8 and spans about 16.5 arcminutes of sky.
Guidance follows standard observing practice, derived from the object's real magnitude and position. A dark, moonless sky always helps.
Facts on this topic will be cited from these primary and reference sources.
Openly-licensed deep-sky catalogue: object types, positions, magnitudes, sizes, morphology, and cross-identifiers.