M57

Messier 57 – Ring Nebula

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M57 - distance 2,300 light years
M57 – distance 2,300 light years

LRGB 8 x L, R, G, B x 2 min

M57 - narrowband
M57 – narrowband

Frames: 20 x 1 m Ha, SII, OIII

Mix R= 0.50*Ha+0.50*SII   – G = 15*Ha+85*OIII – B=OIII

M57