Sh2-297, LBN1037, vdB 94

MOUSEOVER IMAGE FOR STARLESS VIEW

CLICK ON IMAGE FOR FULL SIZE VIEW (7500x5600)

Scope: Celestron 9.25 Edge HD 235 mm at f/7; Location: DAA Observatory, Shelter Valley, CA;  Dates:  8, 9 January, 11, 12 February 2024; Camera: ASI294MM (Baader  Ha, OIII, L, RGB Filters)

Exposure:   Lum 48 x 3 minutes (gain-121 2x2), OIII 92 x 4 minutes (gain-200 2x2), Ha 92 x 4 minutes (gain-180 2x2), RGB - 32 each x 2 minutes  - (gain-121 2x2).

Processing: Data Collection -  N.I.N.A. (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine -  Winsorized sigma clipping,  2X drizzle for  Lum) - PixInsight (WBPP).  NoiseXTerminator (RGB, Lum) - PixInsight.  Non-linear stretching for Lum - PixInsight.    RGB combine and stretching, Photometric RGB calibration (SPCC)  - PixInsight. De-convolution - BlurXTerminator (AI4) - PixInsight. Generation of starless  Lum and RGB image for later processing - StarXTerminator  (PixInsight.)    Lum stars (lower stretch) screened into Lum starless  for star size control - PixInsight.  Luminance  construction layered onto RGB - Pixinsight. Final finishing  - Affinity Photo.  Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is a RGB image with Luminance Layering.  Image processed at 8288x5644 resolution (2x drizzle stacks). Full Field image size is approximately 6448x4391.

North is up in this image. This is a close up image of the emission nebula Sh2-297 (also known as LBN 1039, Ced 90).   Sh2-297 is located at the southern wingtip of the well known Seagull Nebula. Its distance is about 4,000 light years. The reflection nebula vdB 94 is often associated with Sh2-297.  vdB 94 is illuminated by the star HD 53623. The broad vertical emission structure (lower left to upper right) is  part of the larger LBN 1037.

There is dust and interstellar matter in the region (as evidenced by reflection nebulae). This dust comprises some of the structure of the dark nebula LDN 1675A next to Sh2-297 and  dark nebula Dobashi 5079 in the upper right. The open cluster  MWSC 1090 can be seen in the IR spectrum but its optical spectrum light is obscured by dust in this image. There is also a small object designated as a 'likely planetary nebula'  PN G225.5-02.5 just below sh2-297 and stands out in blue surrounded by the red ionized Hydrogen.  The emission and dust structures are better seen in the mouse-over starless image.  

These objects, information, and some of the brighter stars are identified in the annotated image.   The Horizontal Full FOV is approximately 0.603 degrees. Full size image scale is approximately 0.289 arcsec/pix.  This image replaces an earlier image the can be seen in the image archives.

Image Center approximately - Equatorial 2000: RA: 07h 04m 58s Dec: -12°16'21"

All images and content remain the property of Jim Thommes - copyright 2003 - 2024

Current Web Total Hits -