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NGC 4216 and NGC 4168 Region



Scope: FSQ-106N at f/5, Location:  DAA Observatory, Shelter Valley CA,   1 April 2017  Camera: Atik 383 (Astronomik Gen II  LRGB filters)

Exposure: Exposure: 16 x 12 min, (1x1 bin) exposure with UV/IR block,  8 x 4 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Calibrated, stacked (Kappa Sigma Combine) - Deep Sky Stacker, LRGB channel registration and equalization, rough color calibration, gradient removal - Astroart.  Curves, Levels, RGB combine - ImagesPlus, Luminance layering and finishing  - Photoshop. This image is an LRGB combine with Luminance layering. Final color calibration - eXcalibrator. The Luminance construction was the Luminance exposures. Color saturation in LAB color.    Native image size - 3354x2529.  Final Image size is approximately 2800x2100.

North is up in this image. This field straddles the border between the constellations of Virgo and Coma Berenices  The dominant galaxies are the galaxy trio of NGC 4216, 4202, 4222 on the left and NGC 4168 on the right. In addition to these larger galaxies, there are numerous galaxies both in foreground and background. Most of these galaxies are high probability Virgo Cluster members. Those are in the redshift distance near 100 to 120 million light years (examples are NGC 4168 and NGC 4189). Those galaxies less than 60 million light years are low probability members (examples are the trio NGC 4216, 4202, 4222). Those greater than 200 million light years are unlikely to be members (examples are IC 3062, IC 3029, and IC 3046).  These galaxies and some of the bright stars are identified in the annotated image.   Horizontal FOV is 120'

Image center is approximately - Equatorial 2000: RA: 12h 14m 12s Dec: +1318'33" 


All images and content remain the property of Jim Thommes - copyright 2003 - 2017 copyright 2003 - 2012

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