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IC410, NGC 1893 in Auriga



Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 19 and 28 December 2019,  Camera: Atik 383L (Astronomik Gen 2  Ha OIII LRGB Filters)

Exposure:  12 x 8 min (1x1 bin) Luminance filter, 20 x 12 min (1x1 bin) Ha filter, 16 x 12 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 stretching, 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 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  3000x2250.

North is up in this image.  This image field is a composition of the popularly known IC410 open cluster / nebulosity object. It is also known as Sharpless 236 and LBN 807.  Embedded within is  the open cluster NGC 1893, the "interstellar matter" object (ISM) Cederblad 43, the dark nebula LDN 1530, and the well known "tadpoles" (Simies 129 and 130) . This image field is part of the Sharpless 230 / LBN796 structure. Its center is in this image field and encompasses IC405, IC410, and IC417 which are well known objects in themselves. This is an active star forming region with many young stellar objects.  The IC410 star cluster / nebulosity structure is about 6,150 light years distant in the Aur OB2 association.  These objects and some of the brighter stars are seen in the annotated image.  The horizontal FOV is 120'. Image scale of the full size image is 2.4 arcsec/pix. 

Image center is located approximately - Equatorial 2000: RA: 05h 22m 36s Dec: +3329'39" 


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