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Contains:  M 94, NGC 4736, The star σBoo
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M 94 The Cat's Eye Galaxy, 





    
        

            Fritz
M 94 The Cat's Eye Galaxy

M 94 The Cat's Eye Galaxy

Technical card

Imaging telescope or lens:SkyWatcher 254/1200 Newton f/4.7

Imaging camera:Canon 650D(a)

Mount:Celestron CGEM

Guiding telescope or lens:Lacerta MGEN Autoguider

Software:PixInsight 1.8 RipleyAdobe Photoshop

Resolution: 5073x3195

Dates:May 6, 2016May 7, 2016May 8, 2016

Frames:
30x60" ISO400
84x300" ISO800

Integration: 7.5 hours

Darks: ~9

Flats: ~20

Bias: ~50

Avg. Moon age: 10.65 days

Avg. Moon phase: 1.72%

Astrometry.net job: 1076836

RA center: 192.753 degrees

DEC center: 41.099 degrees

Pixel scale: 0.819 arcsec/pixel

Orientation: -100.122 degrees

Field radius: 0.682 degrees

Locations: Mobile Setup, Wien, Austria

Description

I found this very challenging to process:
There is a high dynamic range between the bright inner core and the faint outer ring. The short subs helped a lot and i hope that i could resist the temptation to overstrech the outer ring.

Colouring really gave me a hard time: Av. white and SDSS photometry resulted in a very brown-yellowish appearance, for which i could not find examples on the net. So I went with NOMAD calibration and manual adjustments for this result. I am still not very happy with it.

Comments

Author

Magellen
Fritz
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M 94 The Cat's Eye Galaxy, 





    
        

            Fritz