Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  NGC 4449
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NGC4449 (Caldwell 21)....HaLRGB, Bruce Donzanti
NGC4449 (Caldwell 21)....HaLRGB
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NGC4449 (Caldwell 21)....HaLRGB

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Description

UPDATE:  Reprocessed with Ha data added in
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NGC 4449 (
Caldwell 21), is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away.   It is considered a starburst galaxy due to its high rate of star formation and includes several massive and young star clusters, one of them in the galaxy's center.  NGC 4449 is surrounded by a large envelope of neutral hydrogen that extends over an area of 75 arc minutes (14 times larger than the optical diameter of the galaxy). The envelope shows distortions and irregularities likely caused by interactions with nearby galaxies.

I found this very difficult to process and it surely deserves more integration time from my location, including some Ha data, but weather is not allowing me to do more work on it.  Despite wanting to collect more data, I am pleased with this image, especially compared to my first attempt 2 years ago.

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