NGC 869 (left) and NGC 884 (right) are two open clusters that make up the Double Cluster in the constellation of Perseus.

At a distance of 7,000 light-years, the clusters are separated by only a couple of hundred light-years in space.

The clusters are relatively young at 5.6 and 3.2 million years old respectively.

Both clusters are 30 arcminutes in diameter and shine at magnitude 4.3 and 4.4.

They were cataloged by Hipparcos in 130 B.C. but were almost certainly known long before that since they can be seen by the unaided eye from a dark sky location.

South is up in the above image.

NGC 869, NGC 884 Catalogs: NGC 869, h Persei, Cl 24, Mel 13 NGC 884, Chi Persei, Cl 25, Mel 14 Common Name: Double Cluster Object Type: Open Clusters Magnitude: NGC 869: 5.3v NGC 884: 6.1v Size: 18' each Constellation: Perseus Image Field Centered At: RA: 02h 20m 45s Dec: +57° 11' 26"