Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5451  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461
M101, 1074j
M101
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M101

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Description

M101 at f/10. LRHaGB. Ha and R were blended. L 10x300s 2x2 binned, H-a 7x1500s 2x2 binned, RGB 6x300s 3x3 binned. 21m light years away.

I had lots of trouble with this image as 1/2 of my L subs had to be tossed as they were taken on different nights and didn't line up well enough to salvage. In fact, the L and the HaRGB subs didn't line up that well either and I had to crop the image quite a bit. If I reshoot, I'll do it at f/5, but there are lots of nice wider field M101's around so I don't know if I'll bother.

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  • Final
    M101, 1074j
    Original
  • M101, 1074j
    B

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M101, 1074j