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NGC 7013 in Cygnus



Scope: Celestron 9.25 Edge HD 235 mm at f/7, Location: Tierra Del Sol - SDAA Club Site, CA, 28 August 2019,  Camera: ST8300M (Baader LRGB filters)

Exposure: Exposure: 16 x 13min  (1x1 bin) exposure with UV/IR block filter,  8 x 4.5 min (2x2 bin) each RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Subframe calibration - Pixinsight. Subframe integration (Median combine -  Winsorized Sigma Clipping) - PixInsight.  Non-linear stretching, normalization and gradient removal - PixInsight.  Generation of starless Luminance nebulosity images for later processing - starnet++. Curves, Levels, RGB combine, Luminance layering - PixInsight. Luminance Stars and Starless combine - PixInsight.  Final finishing  - Photoshop.  RGB calibration - eXcalibrator. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This image is a  RGB combine with Luminance layering. The Luminance master was processed with starnet++  for both nebulosity (surface brightness) and stars only image. Images processed at 3352 x 2532 resolution. Final Image size is approximately  2800x2100.

North is up in this image.  This image shows a region of interstellar material and dust illuminated by nearby stars as well as the galaxy, NGC 7013, peeking out from underneath the cloud. The nebulosity in this image has catalog entries in PGCC (Planck Catalogue of Galactic Cold Clumps) as Molecular Clouds. The PGCC objects with areas listed are PGCC G075.46-11.06 and PGCC G075.24-10.99.  The galaxy, NGC 703 is a ring galaxy classified as SA0/a(r). It is about 41.1 million light years by Tully Fisher estimate and 49.9 million light years by redshift estimate. These objects and some of the brighter stars are identified in the annotated image. Horizontal FOV is approximately 38 arc minutes. Full size image scale is 0.81 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: 21h 03m 37s Dec: +3002'27"


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