Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  NGC 4627  ·  NGC 4631  ·  NGC 4656  ·  NGC 4657  ·  Whale Galaxy
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NGC 4631, NGC 4656/57 - Whale and Crowbar Galaxies, Doug Gray
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NGC 4631, NGC 4656/57 - Whale and Crowbar Galaxies

Getting plate-solving status, please wait...
NGC 4631, NGC 4656/57 - Whale and Crowbar Galaxies, Doug Gray
Powered byPixInsight

NGC 4631, NGC 4656/57 - Whale and Crowbar Galaxies

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Description

I was meaning to post this one on Earth Day, but ran out of time. I had gathered some Ha data too, but clouds and the moon got in the way.

Few notes on post processing. 2x Drizzle, which seems to be a requirement when going after galaxies with this focal length. Also, I experimented with the weighted FWHM stacking method in Siril which seems to help when you have too many sub frames to look at individually.

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NGC 4631, NGC 4656/57 - Whale and Crowbar Galaxies, Doug Gray