M101 in LRGB (Christian Großmann)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122865 · 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 in LRGB

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M101 in LRGB

An unexpected clear night in a period of rainy days allowed me to capture M101. The temperature was quite high and the humidity of the air stayed constantly above 90%. The dew point stayed very close to the air temperature. I didn't expect a lot but it turned out, that the images (the object was quite high in the sky) were quite good. So I decided to process the image entirely in PixInsight to get into this (for me) new program. It was the first image I entirely processed in PI. Photoshop was only used to crop the image in an aspect ratio of 2:3, which I usually use.

I am quite happy with the result. I really have to adress the optical problems on the bright stars. Maybe, shorter exposure times will work, but I still have problems to integrate images in PI with a low SNR.

There is not much done in terms of image processing. I stacked the subs with the WBPP script, denoised the single color channels with the EZ decon script, did a deconvolution run (standard deconvolution process) and combined the images after stretching the single channels. At last, I did a little bit of curve adjustments and it was done. Compared to my Photoshop work (which I am also not really experienced with), the colors and the background is much better now.

I know, there are a lot of things you can do to the image. But PixInsight is really uncommon for me and for a beginner also quite overwhelming (not to say comlicated). So I am really excited to get a picture like this out of my subs. I am really happy!

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Status	Advanced success
Started	...
Astrometry.net job	4818107
PixInsight job	5L23DQNGLPWK8D289I1MYOTFSW0RXJ10
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m08s.337
RA (top/left)	14h00m49s.602
RA (top/right)	14h01m00s.220
RA (bottom/right)	14h05m23s.926
RA (bottom/left)	14h05m19s.793

Dec (center)	+54°22′07″.80
Dec (top/left)	+54°50′50″.28
Dec (top/right)	+53°52′31″.52
Dec (bottom/right)	+53°53′13″.43
Dec (bottom/left)	+54°51′33″.67

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M101 in LRGB

M101 in LRGB

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M101 in LRGB

M101 in LRGB

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