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Contains:  NGC 5485, NGC 5474, NGC 5473, M 101, NGC 5457
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Messier 101/Pinwheel Galaxy, 


            Wes Chilton
Messier 101/Pinwheel Galaxy

Messier 101/Pinwheel Galaxy

Technical card

Resolution: 6547x4896

Dates:May 20, 2017

Frames:Astrodon Luminance Tru-Balance E-Series Gen: 95x120" -20C bin 1x1

Integration: 3.2 hours

Darks: ~50

Flats: ~30

Bias: ~512

Avg. Moon age: 23.61 days

Avg. Moon phase: 34.68%

Bortle Dark-Sky Scale: 8.00

Mean SQM: 18.10

Mean FWHM: 2.04

Temperature: 26.00 job: 1585431

RA center: 210.806 degrees

DEC center: 54.349 degrees

Pixel scale: 1.046 arcsec/pixel

Orientation: -179.937 degrees

Field radius: 1.188 degrees

Data source: Backyard


I finally have a few clear nights here (first time in several months!) so I decided to see what was still up in my northern sky away from the worst of the light pollution.

This is just one night, and I could not go further than 2-minute exposures, so I took as many as I could which came out to about 98... with only three subs tossed after Subframe Selector.

Now my seeing was still pretty poor, and therefore focus was only so good. But its a start. :)



Wes Chilton
License: None (All rights reserved)

Sky plot

Sky plot


Messier 101/Pinwheel Galaxy, 


            Wes Chilton

In these public groups

Cloudy Nights