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NGC 4214, 4163, 4190 in Canes Venatici



Scope: Explore Scientific MN152 at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 22 April 2020,  Camera: Atik 383L (Astronomik Gen 2 LRGB Filters)

Exposure: Exposure: 15 x 7 min  (1x1 bin) exposure with UV/IR block filter, 16 x 5 min (1x1 bin) each RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Subframe calibration - Pixinsight. Subframe integration (Average combine -  Winsorized Sigma Clipping) - PixInsight.  MureDenoise on each LRGB integration - PixInsight. Non-linear stretching and normalization  - PixInsight.  Curves, Levels, RGB combine, Luminance layering - PixInsight.  Luminance construction was a weighted average of L, R, G, B integrated stacks.  Final finishing  - Photoshop.  RGB color calibration - PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This image is a  RGB combine with Luminance layering.  Images processed at resolution 3354x2529. Final Image size is approximately  3347x2510.

North is up in this image.  This image shows  NGC 4214, NGC 4163, and NGC 4190 galaxies - all of which are classified as irregular galaxies. NGC 4214 and NGC 4163 have duplicate NGC identifications (NGC 4228, and NGC4 167 respectively). Just below and right of NGC 4214 (the large galaxy) is a small dim irregular PGC 39145.  All of these galaxies are in the same distance neighborhood of 8.5 to 14 million light years. Other background galaxies in this image are further distant. Further still are many Quasars in this field, the four brightest (see annotated image) range in redshift from 0.5 to 1.9. These objects and some of the brighter stars are identified in the annotated image. The full size image has an image scale of approximately 1.57 arcsec/pix.   Horizontal FOV is approximately 88 arc minutes. 

Image center is approximately - Equatorial 2000: RA: 12h 13m 42s Dec: +36 25' 46"


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