Double Cluster in Perseus



Scope: Zenithstar 66 mm APO  at f/4.8, Location: Blair Valley, Anza Borrego Desert, CA   21 October 2011  Camera: Artemis285

Exposure: 14 x 3 min  (1x1 bin) exposure with UV/IR block, 10 x 3 min (1x1 bin) RGB exposures.

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked and dark subtracted in Astroart with Sigma Combine.   IR / UV Blocking  filter  and Color channels were scaled and  color balanced in Astroart.  Channels were co-registered in Astroart.    Luminance channel consisted of the IR/UV blocking filter exposures.  Curves and Levels applied in Photoshop to the Luminance channel to optimize star depth.   Final LRGB combine was done in Photoshop.    Final Image size is approximately 1800 x 1345.

North is up in this image. The catalog references for these clusters are NGC 884 (left) and NGC 869 (right). However, together they are more commonly known as the Double Cluster in Perseus. The clusters are in association with each other at only a few hundred light years apart. These clusters are about 7,000 light years from Earth This image replaces an earlier image that can be seen in the archives here.  Horizontal FOV is 100'

Image center is approximately - Equatorial 2000: RA: 02h 20m 24s Dec: +5709'04" 


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