Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  Pinwheel galaxy
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M101 Pinwheel Galaxy - LRGBHaHb, Paul O’Brien
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M101 Pinwheel Galaxy - LRGBHaHb

Getting plate-solving status, please wait...
M101 Pinwheel Galaxy - LRGBHaHb, Paul O’Brien
Powered byPixInsight

M101 Pinwheel Galaxy - LRGBHaHb

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Acquisition details

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Description

I added 1.5 hours of Ha and used PI's NBRGBCombination to add a touch of Hb (.20) to the blue channel given the O and B stars in this galaxy.  14 hours of integration with 9.5 hours of RGB and 3 hours of Lum with the 1.5 hours of Ha.  120 sec subs @-20C for RGB, 300 sec for Ha, (which I didn't break out in the acquisition details).  Gain56/Offset40 in Bortle 4 skies near Seattle.  I was somewhat surprised at how much Ha is in this galaxy.

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  • M101 Pinwheel Galaxy - LRGBHaHb, Paul O’Brien
    Original
  • Final
    M101 Pinwheel Galaxy - LRGBHaHb, Paul O’Brien
    D

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M101 Pinwheel Galaxy - LRGBHaHb, Paul O’Brien