Month: July 2014
Messier 20, Trifid Nebula
Frames : 8 x L x 3min , 4 x R x 5min, 4 x G x 5min, 1 x B x 5 min (duplicated x3), 8 x Ha x 10min, 6 x OIII x 25 min, 3 x SII x 25 min)
Mixed it with SHO script in Pixinsight (default values + more blue) , then integrated L, and finally integrated HA
Messier 20, Trifid Nebula – First Attempt
Frames : 8 x L x 3min , 4 x R x 5min, 4 x G x 5min, 1 x B x 5 min (duplicated x3), 8 x Ha x 10min)
Crescent Nebula
Frames : 7 x Ha x 12 min, 8 x OIII x 15 min
Palette mix : R = 0.9*Ha+0.1*OIII, G =0.1*Ha+0.9*OIII, B = OIII)
Crescent nebula
Frames : 7 x Ha x 12 min, 1 (duplicated 4 times) x OIII x 15 min
Used formula iif(OIII > 0.5, 1-(1-HA)*(1-(OIII -0.5)), HA*(OIII +0.5)) to make synthetic green (from http://lightvortexastronomy.blogspot.com/2013/03/tutorial-nebulae-pixinsight-guide-for.html)
Palette mix : R = Ha, G = synthetic Green, B = OIII)
Messier 57 – Ring Nebula
LRGB 8 x L, R, G, B x 2 min
Frames: 20 x 1 m Ha, SII, OIII
Mix R= 0.50*Ha+0.50*SII – G = 15*Ha+85*OIII – B=OIII
Messier 16, Eagle Nebula in narrowband
Frames :
SII : 5 x 25m 2 x 20m
Ha: 7 x 10m , 4 x 25 m
OIII: 9 x 25m, 3 x 20m
Mix = R= S, G=0.50 H + 0.50S , B =O
Messier 16, Eagle Nebula in narrowband
Frames : 12 x Ha x 15 min , 8 x SII x 20 min, 8 x OIII x 20 min (3 consecutive days of imaging)
Palette (R = 50%Ha + 50% SII, G = 15%Ha + 85%OIII, B = OIII)
Cloudbreaker 