Sh2-73
close-up incl. parts of LBN 105 and 106 - in LRGB
---------------------------------------
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 )."
---------------------------------------
Click on the image above to see it @ 50% of original size and
to auto
resize in your browser.
Imaging Details:
Telescope: Planewave 12.5" CDK w Astrodon MMOAG and ST402ME autoguider
Camera: Apogee U16M (16803 chip) w 7-position filter wheel and Astrodon
Gen II Filters
Mount: Paramount ME from Software Bisque
LRGB:
27/8/11/10 x 10 min per channel
Acquisition in TSX
via CCD-Commander
Bulk of processing PixInsight and some clean-up in
Photoshop
Lucknow, Ontario, Canada
April 2026
Home