Sh2-73 wide-field incl. parts of LBN 105 and 106 - in LRGB
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From Wikipedia:
"Sh2-73 is a reflection nebula visible in the constellation of
Hercules. Originally mistaken for an H II region, it was later
discovered to be illuminated by the Milky Way as a whole, and is
therefore part of what is called an "IFN" (Integrated Flux Nebulae) .
It can be observed in the southwestern part of the constellation,
bordering the Serpent Head and Corona Borealis . It appears as a very
faint filament, barely perceptible in sensitive astronomical
photographs and completely invisible to casual amateur observation. The
most suitable period for observing it in the evening sky is from March
to September, and it is visible from both hemispheres, despite being
located north of the celestial equator. Sh2-73 is one of the closest
clouds to the Solar System, at only about 200pc (∼652 ly )."
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Imaging Details:
Telescope: Astro-Physics AP110GTX w 0.8x TCC
Camera: ZWO ASI 6200 MC Pro
Mount: Astro-Physics Mach2 UNguided
33x5min
Acquisition with TSX
Bulk of processing PixInsight (used SetiAstro's Statistical Stretch on the RGB component) and some clean-up in
Photoshop
Lucknow, Ontario, Canada
May 2026
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