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Pegasus I Galaxy Cluster

 

CLICK ON IMAGE FOR FULL SIZE VIEW (2400x1800)

Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location:  Blair Valley, Anza Borrego Desert, CA   18 September 2015  Camera: Atik 383L (Astronomik LRGB)

Exposure: Exposure: 16 x 9 min  (1x1 bin) exposure with UV/IR block,  8 x 4.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Calibrated, stacked (Kappa Sigma Combine) Deep Sky Stacker, LRGB channel registration, equalization, and central gradient removal - Astroart.  Curves, Levels, RGB combine Images Plus. Luminance layering and finishing  - Photoshop. This image is a  LRGB combine with Luminance layering.   Final Image size is approximately 2400x1800.

North is up in this image.  The Pegasus I Galaxy Cluster spans about 6.3 degrees of sky and is about four times wider than the field in this image. This field shows the central region where the galaxies are more densely clustered. The two large elliptical galaxies in the center of the image are NGC 7626 (left) and NGC 7619 (right), the center of the cluster lies between these two galaxies. The galaxy cluster has a broad variety of galactic morphological types. There are the ellipticals  - two of which noted above; Spirals (like NGC 7631 and NGC 7608); and a low surface brightness galaxy (UGC 12522 ). These objects and some of the brighter stars are identified in  the annotated image.  Cluster members are identified in the annotated image conservatively, but it is likely that all of the galaxies at close to the distance of the cluster center are members. The Pegasus I Galaxy cluster is centered approximately  is approximately 160 million light years distant from Earth; NGC 7619 is  approximately 170 million light years and NGC 7626 is approximately 160 million light years.  Horizontal FOV is 85'

Image center is approximately - Equatorial 2000: RA: 23h 19m 55s Dec: +0812'28"

 

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