NGC 869 and NGC 884 are commonly called the Double Cluster. Located in the constellation of Perseus, both are young clusters with an age of 12-13 million years old and are only separated by a few hundred light years. Estimated distance to the clusters is 7000 light years.
Oddly enough, Charles Messier didn't include them in his catalog, even though they were know from ancient times.
Double Cluster in Perseus
- Constellation: Perseus
- Right Ascension: 2h 20m
- Declination: 57° 08′
- Distance: 7,460 - 7,640 ly
- Details
- Category: Open Clusters
- Telescope: EDT 80mm Reftactor
- Camera: Atik 314l+