Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  HD85458  ·  M 81  ·  NGC 3031  ·  PGC 2724146  ·  PGC 2726822  ·  PGC 28505  ·  PGC 28529  ·  PGC 28757  ·  PGC 28848
Getting plate-solving status, please wait...
Messier 81 (LRGB), 



    
        

            Linda
Powered byPixInsight
Getting plate-solving status, please wait...
Messier 81 (LRGB), 



    
        

            Linda
Powered byPixInsight

Acquisition details

Dates:
May 8, 2022 ·  May 9, 2022 ·  May 10, 2022 ·  May 11, 2022 ·  May 12, 2022 ·  May 21, 2022 ·  May 22, 2022 ·  May 23, 2022 ·  May 24, 2022 ·  May 25, 2022 ·  May 26, 2022 ·  May 27, 2022 ·  May 28, 2022 ·  May 29, 2022 ·  May 30, 2022 ·  May 31, 2022 ·  June 1, 2022 ·  June 2, 2022 ·  June 3, 2022 ·  June 5, 2022 ·  June 6, 2022 ·  June 7, 2022 ·  June 8, 2022 ·  June 9, 2022 ·  June 10, 2022
Frames:
Astrodon Gen2 I-Series Tru-Balance Blue: 47×600(7h 50′) -25°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Green: 45×600(7h 30′) -25°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Lum: 57×900(14h 15′) -25°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 53×600(8h 50′) -25°C bin 2×2
Integration:
38h 25′
Avg. Moon age:
12.93 days
Avg. Moon phase:
36.58%

RA center: 09h55m27s.740

DEC center: +69°0410.25

Pixel scale: 0.727 arcsec/pixel

Orientation: 89.765 degrees (flipped)

Field radius: 0.507 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 3623x3469

File size: 772.3 KB

Data source: Own remote observatory

Remote source: Sierra Remote Observatories

Description

M81 is an incredibly beautiful target all on its own. When one of my teammates, @gmadkat, suggested we try for some IFN, I was not sure I was going to enjoy the result. I haven't liked many images that include IFN because they either destroy galaxy detail or they look over processed to me. The latter is a purely subjective thing I don't mean to cast aspersions on anyone else's images. It just wasn't what I wanted to produce. So I went into this hoping I could do something that would make me happy and not make me too crazy. I succeeded on one part.

I went through a lot of different iterations trying to bring out the IFN in a pleasing way and, while it was interesting, it was also pretty hard to look at. I suspect the high read noise on this old 16803 sensor is making things a lot harder for this particular case. 

So, after days of trying diferent approach, I ultimately decided to go with a more standard type of processing that didn't push things so hard.


Lum:
dynamic crop
decnvolution
DBE
noiseXterminator
GHS script
starnet2
HDRMT
LHE
clone stamp (remove a starnet artifact)

RGB
dynamic crop
DBE
noiseXterminator
GHS
starnet2
LRGBCombination in lum
Curves (color & contrast)
pixel math in stars

L and RGB stars
LRGBCombination in L stars to RGB stars

One day I'll try the IFN thing again with a different camera and see what happens.

Comments

Revisions

  • Messier 81 (LRGB), 



    
        

            Linda
    Original
  • Messier 81 (LRGB), 



    
        

            Linda
    C

C

Title: Messier 81 with IFN

Description: This is the best version I could produce that include the IFN.

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 81 (LRGB), 



    
        

            Linda