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IC 1848 / Sh2-199 in Cassiopeia



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: 12 x 8 min  (1x1 bin)  UV/IR block Lum filter, 24 x 10 min (1x1 bin) Ha filter, 18 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 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 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  3000x2250.

North is up in this image.  This image field is essentially IC1848  as a cluster plus nebulosity object (AKA Sharpless 2-199). This objects common name is the "Soul Nebula" - it is a part of the larger "Heart and Soul" complex. (The nearby "Heart Nebula" is IC 1805.)  It is a  star forming region of emission nebulosity in the constellation of Cassiopeia. The star cluster portion of IC1848 is smaller in terms of its angular area and is also known as star cluster Collinder 32. Other open star cluster s in this image are SAI 23 and Collinder 34. Collinder 33 is also in this image but rather than a true structural open cluster, it is a "cluster of stars"".  Emission nebulae LBN 670, 673, and LBN 669 (AKA Sharpless 2-198). There are regions of dark nebulae as well.  These object 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: 02h 54m 31s Dec: +6021'54"


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

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