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The Whale and Hockey Stick Galaxies

This is almost 4 hours of data in LRGB on a strangely shaped pair of galaxies, usually referred to as the Whale and Hockey Stick Galaxies. The larger Whale Galaxy (NGC4631) also has a dwarf companion galaxy (NGC4627) just to the right of it in this image.

Equipment:
ZWO ASI1600MM-C Camera @ -20C and
Gain:139 Offset:21
Software Bisque MyT Mount
Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8

Software:
Pixinsight Commercial Version 1.8
Lightroom CC
Photoshop CC

Light Frames:
Luminance: 56 x 60 secs (56 mins)
Red: 56 x 60 secs (56 mins)
Green: 54 x 60 secs (54 mins)
Blue: 54 x 60 secs (54 mins)
Total Duration: 3 hrs 40 mins

Dark Frames:
20 x 60 secs (20 mins)

More details from Wikipedia:
NGC 4631 (also known as the Whale Galaxy or Caldwell 32) is a barred spiral galaxy in the constellation Canes Venatici. This galaxy's slightly distorted wedge shape gives it the appearance of a herring or a whale, hence its nickname.[3] Because this nearby galaxy is seen edge-on from Earth, professional astronomers observe this galaxy to better understand the gas and stars located outside the plane of the galaxy.
NGC 4631 has a nearby companion dwarf elliptical galaxy, NGC 4627. NGC 4627 and NGC 4631 together were listed in the Atlas of Peculiar Galaxies as an example of a "double galaxy" or a galaxy pair.[8]
NGC 4631 and NGC 4627 are part of the NGC 4631 Group, a group of galaxies that also includes the interacting galaxies NGC 4656 and NGC 4657.[9][10][11][12]

The Whale and Hockey Stick Galaxies