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Seagull Nebula Sh2-296, LBN 1033



Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 24 February and 3 March 2020,  Camera: Atik 383L (Astronomik Gen 2  Ha, OIII , RGB Filters)

Exposure:  22 x 10 min (1x1 bin) Ha filter, 20 x 10 min (2x2 bin) OIII  filter, 8 x 5 min (1x1 bin) each RGB filters.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Sub-frame calibration and registration - PixInsight. Sub-frame integration (Average combine -  Winsorized Sigma Clipping) - PixInsight.  Non-linear stretching, normalization and gradient removal - PixInsight.  Generation of starless nebulosity images - starnet++.  Starless color mapping (modified HOO mapping) and RGB stars color - PixInsight. Stars and Starless combine - PixInsight. Final finishing  - Photoshop.  RGB calibration - PixInsight. Annotation - PixInsight, Aladin (Simbad), and PhotoShop. This image is a  modified HOO narrow band mapping with RGB stars.  Images processed at 2529x3354 resolution. Final Image size is approximately  2400x3342.

North is up in this image.  This is an image of the emission nebula Sh2-296 (known popularly as the "Seagull" Nebula and also known as LBN 1033). The region within and around Sh2-296 are several notable celestial structures. Emission nebula IC 2177 (also known as LBN 1027, GUM 1, Sh2-292 Ced 89c) is the Seagull's head and embedded within this structure is the reflection nebula vdB 93. Other reflection nebulae are vdB 91, vdB 92, vdB 95, and NGC 2327. Open clusters are NGC 2335 and NGC 2343 (the "Doublemint" cluster).  Lastly, there is the planetary nebula PN K 1-8.  Also there are many dark nebulae in this field  that are not annotated (Dobashi, TGU and LDN).  These objects and some of the brighter stars are seen in the annotated image.  The Vertical FOV is approximately 120'. Image scale of the full size image is 2.15 arcsec/pix. 

Image center is located approximately - Equatorial 2000: RA: 7h 53m 46s Dec: -1043'50" 


All images and content remain the property of Jim Thommes - copyright 2003 - 2020

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