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NGC 4151, NGC 4145 and others

 

CLICK ON IMAGE FOR FULL SIZE VIEW (6193x4126)

Scope: FSQ-106N at f/8- w/ Q-Telex, Location: DAA Observatory, Shelter Valley, CA,   20 April 2023  Camera: ASI2600MM (Astronomik type 2c LRGB, filters)

Exposure: Luminance - 72 x 3 minutes (gain-121 2x2) ,  RGB - 24 each x 2 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  Clipping Rejection) - 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 6248x4176 resolution. Final Image size is approximately 6193x4126.

North is to the left in this image. The two large galaxies  are NGC 4145 (SAB(rs)d, Dist - 58 million light years) and NGC 4151 ((R')SAB(rs)ab, Dist - 57 million light years).. Also in this image are NGC 4156 at a more distant 320 million light years; IC 3014 and IC 3022 at 300 and 299 million light years respectively. There are many background galaxies seen on the full size image. There are multiple Quasars in this image (as seen on the annotated image) - the furthest of which, SDSS J121137.97+391717.3,  has a redshift of  3.304 (light travel time or Lookback of 11.77 billion years). These objects, information,  and some of the brighter stars are identified in the annotated image  Horizontal FOV is approximately 103 arc minutes. Full size image scale is approximately 0.99 arcsec/pix..  

Image center is approximately - Equatorial 2000: RA: 12h 10m 17s Dec: +3926'42" 

 

 

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