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NGC 5371 and Hickson 68



Scope: Celestron 9.25 Edge HD 235 mm at f/7, Location: DAA Observatory, Shelter Valley, CA, 9 April and 3 May 2021  Camera: ASI294MM (Baader  LRGB Filters)

Exposure: Exposure: L - 64 x 4 minutes (gain-121 2x2) ,  RGB - 40(R), 33(G), 20(B)x 3 minutes  - ( all RGB gain-121 2x2).

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Sub-frame calibration - Pixinsight. Sub-frame  registration and integration (Average combine -  Winsorized Sigma Clipping) - PixInsight.  Mure Denoise - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight.   Curves, Levels, Deconvolution, RGB combine, Luminance layering - PixInsight.  Final finishing  - Affinity Photo.  Photometric RGB calibration - PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and Affinity Photo. This image is a  LRGB with luminance layering.  Image processed at 4144x2822 resolution. Final Image size is approximately  4144x2822.

North is up in this image.  Upper left galaxy is NGC 5371, a  weakly barred spiral with ring and spiral arm features. The compact galaxy group Hickson 68 is to the right. The Hickson group contains NGC 5353, 5354, 5350, 5355, and 5358. NGC 5350 is a strongly barred spiral with ring. A small spiral, UGC 8841 is in the lower part of the image. All of these galaxies are in the same distance range 115 to 126 million light years by redshift estimate. There are several quasars in this image with high redshifts (up to 2.585 with lookback time of 11 billion light years).   These objects, information, and some of the brighter stars are identified in the annotated image. Horizontal FOV is approximately 39 arc minutes. Full size image scale is approximately 0.56 arcsec/pix.. This image replaces  an earlier image in the Archives here.

Image center is approximately - Equatorial 2000: RA: 13h 54m 32s Dec: +4021'18"


All images and content remain the property of Jim Thommes - copyright 2003 - 2021

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