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Contains:  M 101, NGC 5422, NGC 5443, NGC 5457, NGC 5473, NGC 5474, NGC 5485
M101 with ST80, 


            Dan Phillips
M101 with ST80
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M101 with ST80

Technical card

Dates:April 16, 2015

Frames: 161x60"

Integration: 2.7 hours

Avg. Moon age: 26.91 days

Avg. Moon phase: 7.55%

Basic astrometry details job: 607284

RA center: 14h 4' 4"

DEC center: +54° 45' 32"

Pixel scale: 2.199 arcsec/pixel

Orientation: -78.732 degrees

Field radius: 1.683 degrees

Resolution: 4583x3063

Locations: Cowboy Camp, Davis, CA, United States


Another aperture-stacked image:
161x60" @ full aperture (f/5)
35x30" @ f/9 (stopped down with cap), for much better results on bright stars

combined with masks in GIMP

Drove to a blue zone for this one.



Dan Phillips
License: None (All rights reserved)

Sky plot

Sky plot


M101 with ST80, 


            Dan Phillips