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Contains:  Great Nebula in Andromeda, M 110, M 31, M 32, NGC 205, NGC 221, NGC 224
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The Andromeda Galaxy (M31), 


            Josh Woodward
The Andromeda Galaxy (M31)
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The Andromeda Galaxy (M31)

Technical card

Dates:Oct. 29, 2019Oct. 31, 2019Nov. 2, 2019

ZWO Ha 1.25": 28x300" (gain: 200.00) -15C bin 1x1
ZWO L 1.25": 293x30" (gain: 76.00) -15C bin 1x1
ZWO RGB 1.25" Filters: 180x90" (gain: 76.00) -15C bin 1x1

Integration: 9.3 hours

Darks: ~40

Flats: ~20

Flat darks: ~30

Avg. Moon age: 3.57 days

Avg. Moon phase: 15.98%

Bortle Dark-Sky Scale: 5.00

Mean FWHM: 3.50

Temperature: 4.00

Basic astrometry details job: 3035589

RA center: 0h 42' 37"

DEC center: +41° 15' 39"

Pixel scale: 1.585 arcsec/pixel

Orientation: 269.323 degrees

Field radius: 1.195 degrees

Resolution: 4375x3215

Locations: backyard, Chico, CA, United States

Data source: Backyard


My yearly attempt at M31. I just got a new mount (CEM60) and I think that the kinks have been worked out. We had some pretty good seeing in Northern California over the past week or so which helps. I managed to get my guiding RMS down to about 0.58 which is about twice as good as I was able to get with my previous mount.



Josh Woodward
License: None (All rights reserved)

Sky plot

Sky plot


The Andromeda Galaxy (M31), 


            Josh Woodward