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Contains:  NGC 5477, NGC 5473, M 101, NGC 5457
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The Pinwheel Galaxy (M101), 


            Jeffrey Horne
The Pinwheel Galaxy (M101)

The Pinwheel Galaxy (M101)

Technical card

Resolution: 4669x3324

Dates:May 24, 2019

Frames:Optolong L-Pro 2": 176x180" ISO1600

Integration: 8.8 hours

Darks: ~156

Flats: ~256

Bias: ~256

Avg. Moon age: 20.19 days

Avg. Moon phase: 70.22%

Bortle Dark-Sky Scale: 8.00

Temperature: 23.30 job: 2724787

RA center: 210.766 degrees

DEC center: 54.370 degrees

Pixel scale: 1.070 arcsec/pixel

Orientation: 269.901 degrees

Field radius: 0.852 degrees

Locations: Backyard - Bortle 8, Nashville, TN, United States

Data source: Backyard


A difficult target from Bortle 8 skies with an 8SE, but I'm really proud of this one.



Jeffrey Horne
License: Attribution Creative Commons

Sky plot

Sky plot


The Pinwheel Galaxy (M101), 


            Jeffrey Horne