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Contains:  M 94, NGC 4736
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M94, The Cat's Eye Galaxy, 





    
        

            John Hayes
M94, The Cat's Eye Galaxy

M94, The Cat's Eye Galaxy

Technical card

Resolution: 5061x3416

Dates:May 9, 2015

Frames: 52x600" ISO800 18C

Integration: 8.7 hours

Flats: ~42

Bias: ~36

Avg. Moon age: 20.09 days

Avg. Moon phase: 71.19%

Mean SQM: 21.08

Temperature: 10.00

Astrometry.net job: 640168

RA center: 192.695 degrees

DEC center: 41.111 degrees

Pixel scale: 0.347 arcsec/pixel

Orientation: 53.782 degrees

Field radius: 0.294 degrees

Locations: Deep Sky West, Rowe, NM, United States

Description

I started on M94 when I first got my modified 6D and it has been on my "unfinished business list for nearly a year. M94 is pretty bright but it's not very colorful and it sits in a moderately un-colorful local area of the sky. However, if you scan the image up close, there are galaxies everywhere! Overall, I was a bit surprised by the difficulty of getting a good image. I managed to assemble this image from a grand total of about 52 x 600 second subs take over about a week. Once I had the data, I found processing to be a significant challenge. First, I changed the color balance in my camera during this run (that was a bad idea!) Second, the low brightness outer halo combined with super bright core and the low contrast spiral arms made this a tough processing task. As I worked to get the color under control, the blue/purple central area emerged and I was delighted to see that feature in other images I've seen floating around the web. In hindsight, this galaxy is pretty big and it would have been a great subject to shoot with the f/7 focal reducer. I always appreciate any C&C so feel free to tell me how I could make it better.

John

Comments

Author

jhayes_tucson
John Hayes
License: None (All rights reserved)
7024
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M94, The Cat's Eye Galaxy, 





    
        

            John Hayes

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