IC 5068 in Cygnus
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CLICK ON IMAGE FOR FULL SIZE VIEW (5825x4149) 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
image. This 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: +42°30'15"
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