Sh2-203
in Perseus - HaRGB
Sh2-203 is an HII region in Perseus. It is VERY dim.
Scope:Planewave 12.5" CDK
Camera: Apogee U16M (16803 ccd) w Gen II Astrodon filters
Exposures: 11/8/8 x 10 min RGB, 58 x 20min H-Alpha
Paramount ME guided w an Astrodon MMOAG and SBIG ST402ME
Image acquisition with TSX and CCD-Commander
Calibration and processing all in PixInsight: GradientCorrection, SPCC,
BlurX, NoiseX, then Seti Astro's Statistical Stretch followed with some
Curves, HT.
H-Alpha: Gradient Correction, BlurX, NoiseX, StarX then Seti Astro's
Statistical Stretch then curves on the starless version.
Starless Ha combined with the RGB via HaRGB_Combine in PixInsight.
Save-as-TIFF
Photoshop cleanup, crop and Save-for-Web
Click on the image to see them fill the screen
Oct 2025
Lucknow, Ontario
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