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Contains:  M 16, Eagle nebula, NGC 6611
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Eagle Nebula, 





    
        

            Tom Robbe
Eagle Nebula

Eagle Nebula

Technical card

Resolution: 2104x1398

Dates:Sept. 15, 2017Sept. 16, 2017Sept. 17, 2017

Frames: 112x150" ISO2000

Integration: 4.7 hours

Darks: ~52

Flats: ~21

Bias: ~17

Avg. Moon age: 25.62 days

Avg. Moon phase: 16.93%

Temperature: 13.90

Astrometry.net job: 1741421

RA center: 274.730 degrees

DEC center: -13.842 degrees

Pixel scale: 2.523 arcsec/pixel

Orientation: 339.799 degrees

Field radius: 0.885 degrees

Locations: Home, Sebastopol, CA, United States

Description

I gathered frames for three nights for this image. I haven't been guiding lately, so I tried a little experiment. I first cut a few very bad frames out, which gave me 112. I stacked and processed that. I was a bit disappointed, so I went back through the frames and did my best to chose the best 56. Then I processed those. When I compared the outcome, there is very little, if any, real difference-- 56 frames (2.3 hrs), compared to 112 frames (4.6 hrs). I decided to post the 112 frame image, but it seems to me, a toss up... Of course, if I had 112 frames of the better quality ones, I would most likely have a better image to post.

Comments

Author

trobbet
Tom Robbe
License: None (All rights reserved)
1020
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Eagle Nebula, 





    
        

            Tom Robbe