vdB 7, 8, 9 and LDN 1355, 1357
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CLICK ON IMAGE FOR FULL SIZE VIEW (4800x3189) 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
image. Horizontal 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"
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