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NGC 4631 and 4656 in Canes Venatici



Scope: FSQ-106N 106 mm refractor at f/5, Location: Blair Valley, Anza Borrego Desert, CA  12 April 2013  Camera: Artemis285

Exposure: 14 x 6 min  (1x1 bin) exposure with UV/IR block, 8 x 3 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Artemis Capture (as FITs).  Calibrated, stacked (Sigma Combine), LRGB channel registration, equalization, central gradient removal - Astroart.  Curves, Levels, LRGB combine and finishing  - Photoshop. Final color Calibration with eXcalibrator. This image is a straightforward LRGB combine with Luminance layering.     Final Image size is approximately 1600x1189.

This image was a guided image. North is up in this image. There are 4 galactic objects in this image - two are predominant. In the upper right is NGC 4631 popularly known as the Whale Galaxy with a close neighbor NGC 4627.  In the lower left is NGC 4656 and NGC 4657 - together they form what is popularly known as the Crowbar Galaxy. These objects are in Canes Venatici near the Coma Berenices border.  This image replaces an earlier image that can be seen in the Archives here.  A close up of just NGC 4631 can be seen here. Horizontal FOV is about 55'.  

Image center is approximately - Equatorial 2000: RA: 12h 42m 55s Dec: +3218'35" 


All images and content remain the property of Jim Thommes - copyright 2003 - 2013

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