Messier 5 Globular Cluster

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M5 Globular Cluster – distance 24,000 light years
M5 Globular Cluster – distance 24,000 light years
M5
M5

NGC 6709

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NGC 6709 - distance 3,504 light years
NGC 6709 – distance 3,504 light years

Frames : L x 12m x 5 m, G x 2 x 10m, R x 6 x 5m, B x 6 x 10 m

NGC6709

Messier 27, Dumbbell Nebula

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M27 - distance 1,300 light years
M27 – distance 1,300 light years

Frames: 4 x 15m x Ha, 4 x 15m x OIII, 4 x 15m x SII
Mix: R = 50%Ha + 50%SII, G = 15%Ha + 85% OIII, B = OIII

Messier 20, Trifid Nebula

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M20, Trifid Nebula
M20, 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

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M20, Trifid Nebula - distance 5,200 light years
M20, Trifid Nebula – distance 5,200 light years

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)

M20

Crescent Nebula

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NGC 6888, Crescent Nebula – distance 5,000 light years
NGC 6888, Crescent Nebula – distance 5,000 light years

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

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NGC 6888, Crescent Nebula - distance 5,000 light years
NGC 6888, Crescent Nebula – distance 5,000 light years

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

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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

Messier 16, Eagle Nebula in narrowband

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M16
M16

 

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