The Double Cluster is the common name for the naked-eye open clusters NGC 884 and NGC 869, which are close together in the constellation Perseus. NGC 884 and NGC 869 are at distances of 7600 and 6800 light-years away, respectively, so they are close to one another in space as well.

Imaging Data

Date: 10-11-2010

Location : Sudbury, Massachusetts

Optics : Williams Optic ZenithStar 66 Semi Apo Refractor F/5.9

Filter(s) : Astronomik CLS-CCD

Mount : Piggyback on Meade LX-200 on ATS Pier and Mitty Wedge

Autoguiding : None

Camera : Canon EOS 1000D Astro-modified

Exposure info : 60 x 60 and 30 x 120 second Exposures @ISO 1600

Total Exposure : 120 minutes