Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 2841
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NGC2841 LRGB, andrea tasselli
NGC2841 LRGB
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NGC2841 LRGB

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NGC2841 LRGB, andrea tasselli
NGC2841 LRGB
Powered byPixInsight

NGC2841 LRGB

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Description

I battled for years with this one, starting in 2009 and ending in 2012. I started originally at a longer focal length hoping to achieve a better resolution but this plan ended up in frustration as it seemed I never got enough signal to achieved a decent SNR and the colour frames were a total disaster. In 2012 I finally saw the light and used a faster f/ratio which seems to do the trick, combined with favourable weather for once. It turned out I had better FWHM at shorter focal length than at longer one. Lesson learned the hard way.

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NGC2841 LRGB, andrea tasselli