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vdB 7, 8, 9 and LDN 1355, 1357



Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA,  29 August, 22 September 2022,  Camera: ASI2600MM (Astronomik type 2c LRGB filters)

Exposure: Exposure:  Lum - 72 x 3 min (gain-160 1x1) ,  RGB -24 x 2 min (gain-100 1x1) each RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (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 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, Photometric RGB calibration, and Luminance layering - PixInsight. Final finishing  - Affinity Photo. Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is a  LRGB wide band image  with Luminance layering.  Image processed at 6248x4176 resolution. Final Image size is approximately  4800x3189.

North is to the right in this image.  This image shows the dark nebulae LDN 1355 and LDN 1357 (also commonly known together the "Helping Hand" nebula).  LDN 1355 forms the palm and LDN 1357 forms the forward fingers. Also included in the image is vdB 8, vdB 9, and vdB 7 (from left to right across the image). This image is in a region of space called the "Zone of Avoidance" where Milky Way interstellar medium obscures light from further galaxies. Several of these galaxies can be seen (though somewhat obscurely). These galaxies Have catalog designations form the ZOAG catalog.  These objects and some of the brighter stars are identified in the annotated imageHorizontal FOV is approximately 152 arc minutes. Full size image scale is about 1.9 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: 2h 50m 30s Dec: +68 52' 58"


All images and content remain the property of Jim Thommes - copyright 2003 - 2022

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