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IC 5068 in Cygnus



Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 16 and 20 June, 2023,  Camera: ASI2600MM (Astronomik type 2c RGB, 6 nm Ha, OIII filters)

Exposure: Exposure: Ha - 85 x 3.5 min (gain-160 1x1), OIII - 80 x 5 min (gain-180 1x1) ,  RGB -36 x 2 min (gain-101 1x1) each RGB exposures.

Processing: Data Collection -  N.I.N.A. Sequencer (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.  Generation of starless nebulosity Ha, OIII, and RGB images for later processing - Star XTerminator. Curves, Levels, RGB combine, Luminance layering - PixInsight. RGB Stars and Narrow Band / Wide Band Starless  combine - PixInsight.  Final finishing  - Affinity Photo.  Photometric RGB calibration - PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and Affinity Photo. This image is a  Bicolor Narrow Band starless image (modified HOO) and starless Wide Band image with RGB stars combined to the starless composition.  Image processed at 6248x4176 resolution. Final Image size is approximately  5825x4149.

North is up in this image.  This image shows the region centered about IC 5068 (also known as LBN 328).  Included are LBN  320, 327, 329, 332, 348/349 and dark nebulae LDN 915. Several dark nebulae from the TGU catalog are in this region - TGU H497 P3, P9, P11, P15, P19, and P20. There are dusty clouds (ISM) throughout this region - they are the darkish brown areas seen in the image.  Some of the bright stars shown in the annotation range from 470 light years to 2,620 light years distant. Distance for IC 5068 and surrounding nebulosity is difficult to pin down, but it is believed to be in the 1,600 light year range.  These objects and some of the brighter stars are identified in the annotated imageThis image replaces an earlier image that can be seen in the Archives here Horizontal FOV is approximately 145 arc minutes. Full size image scale is about 1.5 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: 20h 51m 12s Dec: +4230'15"


All images and content remain the property of Jim Thommes - copyright 2003 - 2023

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