Celestial hemisphere:  Northern  ·  Constellation: Cancer (Cnc)
Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia), Chris Sullivan
Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia)
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Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia)

Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia), Chris Sullivan
Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia)
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Abell 31 / Sh2-290 / PK 219+31.1 (Asteroid 189 Phthia)

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Description

This would have come out better if I had used the Newtonian, but I had the refractor up and this target was well-positioned, so I did it with the refractor. Even with a decent amount of data, I found it very hard to keep the noise down while preserving structure - and there is a lot of interesting structure in this one.

Also of note is Asteroid 189 Phthia, which can be seen to the center-right of the image. I first thought it was a cosmic ray, but it couldn't find it any of my subs, so I looked more closely and found movement over the 3-hour period I did the RGB field. You can find an animation of it here: https://www.astrobin.com/332490/

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