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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205, The star νAnd, The star 32And
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M31 in Ha, 


M31 in Ha

M31 in Ha

Technical card

Resolution: 2845x1825

Dates:Dec. 5, 2018

Frames:Baader f/2 Highspeed 1.25" H-Alpha Filter: 37x120" ISO800

Integration: 1.2 hours

Darks: ~47

Flats: ~15

Bias: ~30

Avg. Moon age: 27.78 days

Avg. Moon phase: 3.44%

Bortle Dark-Sky Scale: 6.00 job: 2402068

RA center: 10.566 degrees

DEC center: 41.073 degrees

Pixel scale: 7.596 arcsec/pixel

Orientation: 79.308 degrees

Field radius: 3.566 degrees

Data source: Backyard


I wanted to evaluate the value to get Ha signal from M31. I tried to combine this 1 hour of Ha + 1 hour of color and the improvement was not visible.



License: None (All rights reserved)

Sky plot

Sky plot


M31 in Ha,