Home Galaxy Gallery Nebula Gallery Globular Clusters Open Clusters My Equipment Misc Astro Gallery


IC1396, Sh2-131 Region



Scope: Sigma 150 APO DSLR Lens at f/4.5, Location: DAA Observatory, Shelter Valley, CA, 2 and 4 September 2021,  Camera: ASI294MM (Baader Ha, RGB, ZWO OIII filters)

Exposure: Exposure: Ha - 40 x 6 min (gain-200 2x2), OIII - 40 x 8 min (gain-200 2x2) ,  RGB -20 x 3 min (gain-100 2x2) each RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Sub-frame calibration - Pixinsight. Sub-frame  registration and integration (Average combine -  Winsorized Sigma Clipping) - PixInsight.  Mure Denoise - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight.  Generation of starless nebulosity Ha and OIII images for later processing - starnet++. Curves, Levels, RGB combine, Luminance layering for stars - PixInsight. Stars and Starless  combine - PixInsight.  Final finishing  - Affinity Photo.  Photometric RGB calibration - PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and Affinity Photo. This image is a  Bicolor narrow band image (modified HOO) with RGB stars.  Image processed at 4144X2822 resolution. Final Image size is approximately  3800X2572.

North is up in this image.  This image shows the IC 1396 star cluster (also known as Collinder 439 and Trumpler 37), associated emission nebulosity Sh2-131 (LBN 455), and the nearby region. Its wide field coverage includes  parts of Sh2-134 and Sh2-132. Open clusters NGC 7235 and NGC 7261 are in this field as well as vdB 142 and vdB 148. There are numerous dark nebulae in this field from the LDN and Barnard catalogs.  Some Lynds Bright Nebula objects are here as well. These objects and some of the brighter stars are identified in the annotated image. Horizontal FOV is approximately 7.37 degrees. Full size image scale is about 7.0 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: 21h 53m 09s Dec: +5757'45"


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

Current Web Total Hits -

- Unique Visitors