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Contains:  NGC 5477, M 101, NGC 5457
Getting plate-solving status, please wait...
M 101 Pinwheel Galaxy, 


            Gary Opitz
M 101 Pinwheel Galaxy

M 101 Pinwheel Galaxy

Technical card

Resolution: 3132x2376

Dates:June 6, 2019June 8, 2019June 22, 2019June 23, 2019June 25, 2019

Astrodon 5nm Ha: 20x360" (gain: 76.00) -15C bin 1x1
ZWO Blue: 55x120" (gain: 76.00) -15C bin 1x1
ZWO Green: 50x120" (gain: 76.00) -15C bin 1x1
ZWO LUM: 225x90" (gain: 76.00) -15C bin 1x1
ZWO Red: 44x120" (gain: 76.00) -15C bin 1x1

Integration: 12.6 hours

Darks: ~40

Flats: ~40

Bias: ~60

Avg. Moon age: 14.21 days

Avg. Moon phase: 47.08%

Bortle Dark-Sky Scale: 5.00 job: 2767613

RA center: 210.809 degrees

DEC center: 54.376 degrees

Pixel scale: 0.798 arcsec/pixel

Orientation: 173.797 degrees

Field radius: 0.436 degrees

Locations: Home Observatory, Rochester, New York, United States

Data source: Backyard


I've imaged M101 several times over the last few years, This year I added hydrogen alpha data to better show the Ha emission areas in the spiral arms. Acquired and processed as HaLRGB.



Gary Opitz
License: None (All rights reserved)

Sky plot

Sky plot


M 101 Pinwheel Galaxy, 


            Gary Opitz