NGC4631, a LArtL-RHa,GOIII,BOIII picture

Niels V. Christensen
Location of photo
Copenhagen, Denmark
Date/Time of photo
20,21,22 April-2018
Please check this link info.
NGC4631 color picture. Exposures done like this: 20 April-2018, R=38x60sec, G=36x60sec, B=42x60sec. 21 April-2018, Ha=6x300sec, OIII=6x300sec, Lum=52x60sec. 22 April-2018, Ha=10x600sec, OIII=11x300sec.
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