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LBN10, 11, 15, 18, 19 and LDN134, 169, 183 Region



Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 12, 16, and 20 May 2023,  Camera: ASI2600MM (Astronomik type 2c LRGB filters)

Exposure: Exposure:  Panel 1 - Lum 72 x 3.5 min (gain-101 1x1),  RGB 24 x 2 min (gain-101 1x1). Panel 2 - Lum 72 x 3.5 min (gain-101 1x1) ,  RGB - 26 x 2 min (gain-101 1x1)

Processing: Data Collection -  N.I.N.A. (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine - Winsorized Sigma Clipping) - PixInsight (WBPP).  Mure Denoise - PixInsight. Deconvolution - BlurxTerminator (via PixInsight). Non-linear stretching and gradient removal - PixInsight.  Generation of starless nebulosity Luminance images for later processing - Star XTerminator. Stars only image separately stretched, Luminance starless and mono stars only combine for luminance construction - PixInsight. RGB combine, RGB stretching, SpectroPhotometric RGB calibration (SPCC), and Luminance layering - PixInsight. Mosaic By Coordinates and Gradient Merge Mosaic - PixInsight.  Final finishing  - Affinity Photo. Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is a  LRGB wide band image  with Luminance layering.  Image panels  processed at 6248x4176 resolution. Final Mosaic Image size is approximately  4800x6118.

North is up in this image.  This is a two panel mosaic image. It shows a wide field of the region around LBN 10, 11, 15, 18,  and  19.  These LBN objects are  level 5 and 6 (faint) on the Lynds brightness scale. Also in this image is LDN 134 (also MBM 36), LDN 169, LDN 183 (also MBM 37). There are multiple other dark structures in this field with a significant number from the TGU and PGCC catalogs.  Also, there are a surprising number of background galaxies and quasars (or candidates) in this field along with the interstellar matter. Many of these are small and can only be seen inn the full size image. The furthest quasar visible in this image is SDSS J155315.30-023228.0 -  it has a redshift of 3.470 and a light travel time of 11.87 billion years (lookback). These objects and some of the brighter stars are identified in the annotated image.   Horizontal FOV is approximately 3.14 degrees. Full size image scale is about 1.88 arcsec/pix.

Image center is located approximately - Equatorial 2000: RA: 15h 53m 37s Dec: -0406'40"


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

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