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NGC 5899 with NGC 5893, 5895, 5896, 5900



Scope: Celestron 9.25 Edge HD 235 mm at f/7, Location: DAA Observatory, Shelter Valley, CA, 24 and 30 April 2022,  Camera: ASI294MM (Baader  LRGB Filters)

Exposure: L - 72 x 4 minutes (gain-121 2x2) ,  RGB - 22 each x 2.5 minutes  - (gain-121 2x2).

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine -  Winsorized Sigma Clipping) - PixInsight (WBPP).  Mure Denoise - PixInsight.  Non-linear stretching, normalization and gradient removal - PixInsight.   Curves, Levels, RGB combine, Luminance layering - PixInsight. Generation of starless Luminance image for later processing - StarXTerminator. Photometric RGB calibration (SPCC) - PixInsight.  De-convolution - BlurXTerminator.  Final finishing  - Affinity Photo.  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  4000x2710.

North is up in this image.  This group of galaxies appear to revolve around a central star - an astronomical impossibility due to differences in mass and distance. Galaxies (counterclockwise from upper left) are NGC 5900, NGC 5899, NGC 5893, and MCG +07-31-041. Next to NGC 5893 toward bottom left are two smaller galaxies NGC 5895 and NGC 5896. Galaxies NGC 5900 / NGC 5899 are a pair at about 122 million light years distant (by redshift estimate) and  NGC 5893 / NGC 5895 are a pair at about 249 million light years distant (by redshift estimate). The bright star in the middle of the image is HD 135530  and is at a distance of 1,026 light years distant (by parallax estimate). There are numerous background galaxies - several notable have PGC catalog ID's. The Galaxy Group (SDSSCGB 11381) is visible in the lower right and is about 1,608 million light years distant (by redshift estimate). The furthest objects are the Quasars - those visible in this image are from  1.29 to 11.93 billion years (Lookback).  These objects, information, background galaxies and some of the brighter stars are identified in the annotated image Horizontal FOV is approximately 39.5 arc minutes. Full size image scale is approximately 0.59 arcsec/pix.

Image Center approximately - Equatorial 2000: RA: 15h 14m 08s Dec: +4209'13"


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