
The Double Cluster is the name for two open clusters, NGC 884 and NGC 869, and are located close together in the Perseus constellation. Also known as h Persei and χ Persei (h and Chi Persei), the open clusters both lie at an estimated distance of 7,600 light-years from Earth and are roughly 12.8 million years old. The Double Cluster is circumpolar (continuously above the horizon) from most northern latitudes. These deep-sky wonders are in proximity to the constellation Cassiopeia and are approximately the radiant of the Perseid meteor shower, which peaks annually around August 12 or 13.
The Double Cluster - NGC 884 (left) and NGC 869 (r...