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Sharpless 2-119 in Cygnus

 

CLICK ON IMAGE FOR FULL SIZE VIEW (2800 x2100)

Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 31 July and 7 August 2019,  Camera: Atik 383L (Astronomik Gen 2  Ha OIII LRGB Filters)

Exposure: 16 x 8 min  (1x1 bin)  UV/IR block Lum filter, 20 x 10 min (2x2 bin) Ha filter, 16 x 10 min (2x2 bin) OIII  filter, 8 x 4 min (2x2 bin) each RGB filters.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Subframe calibration and registration - PixInsight. Subframe integration (Median combine -  Winsorized Sigma Clipping) - PixInsight.  Non-linear stetching, normalization and gradient removal - PixInsight.  Generation of starless nebulosity images - starnet++.  Starless color mapping and LRGB stars color mapping - PixInsight. Stars and Starless combine - PixInsight. Final finishing  - Photoshop.  RGB calibration - eXcalibrator. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This image is a  modified HOO narrow band mapping with RGB stars.  Images processed at 3354 x 2529 resolution. Final Image size is approximately  2800 x 2100.

North is up in this image.  The whole field in this image is essentially Sharpless 2-119 (AKA LBN 391). It is in a region of emission nebulosity in the constellation of Cygnus. The bright blue star is HD 203064 (aka SAO 50690, 68 Cygni). This star is considered one of the more significant of 6 ionizing stars for the emission region. Within the overall structure of Sh2-119 are seven LBN objects (LBN 383, 389, 390, 393, 400, 401, 402) and  nine LDN objects (LDN 942, 943, 944, 946, 947, 948, 951, 952, 953). Weakly seen in this image data is the small Ha region PN WE 2-245 (formerly classified as a planetary nebula) as well as background galaxies PGC 66592 and PGC 66627. These object and some of the brighter stars are seen in the annotated image. This image replaces an earlier image in the archives here.  The Horizontal FOV is 120'.

Image center is located approximately - Equatorial 2000: RA: 21h 18m 52s Dec: +4349'41"

 

All images and content remain the property of Jim Thommes - copyright 2003 - 2019

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