Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5451  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471
M101- The Pinwheel galaxy, Scorpuis_LL
M101- The Pinwheel galaxy
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M101- The Pinwheel galaxy

M101- The Pinwheel galaxy, Scorpuis_LL
M101- The Pinwheel galaxy
Powered byPixInsight

M101- The Pinwheel galaxy

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Description

My first submission is the well known Pinwheel galaxy M101, one of my favorite objects. This image takes me a lot of time struggling with the bad weather and finally integrated it using a total exposure data of 22 hours, but its still hard for me to obtain a high SNR image because of  the poor exposure time of 4 hours on L channel  and also the noise of my camera is high. The seeing was not very good during the exposure so it is challenging for my 2400 mm focal length telescope to acquire good quality frames with sharp details. I have put lots of efforts on processing this image to extract more details while preserving the SNR.

Hope you enjoy it 

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M101- The Pinwheel galaxy, Scorpuis_LL