Thank you for your patience while we retrieve your images.

The Pinwheel Galaxy, M101

A first try at a high magnification image of a galaxy. Lots of trouble processing this one, with issues with color balancing, and eventually giving up on separately including a Hydrogen-alpha layer. But this face on galaxy is such an interesting target, with it's many star forming regions, grand spiral design, and obvious signs of a tidal disruption from a close encounter with a passing galaxy in its past, that I am still enjoying this result.

ZWO ASI1600MM-C Camera @ -15C and
gain:139 Offset:21
Software Bisque MyT Mount
Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8

Pixinsight Commercial Version 1.8
Lightroom CC
Photoshop CC

Light Frames:
Luminance: 55 x 90 secs (82.5 mins)
Red: 6 x 150 secs (15 mins)
Green: 6 x 150 secs (15 mins)
Blue: 6 x 150 secs (15 mins)

Dark Frames:
20 x 90 secs (30 mins)
20 x 150 secs (50 mins)

Details about The Pinwheel Galaxy From Wikipedia:
The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs)[3] away from earth in the constellation Ursa Major. First discovered by Pierre Méchain on March 27, 1781, it was communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries.
M101 is a large galaxy comparable in size to the Milky Way. With a diameter of 170,000 light-years it is roughly equal the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.[11]

The Pinwheel Galaxy, M101