Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Crescent nebula, NGC 6888
Getting plate-solving status, please wait...
NGC 6888 - Crescent Nebula [Bicolor], 





    
        

            jdifool
NGC 6888 - Crescent Nebula [Bicolor]

NGC 6888 - Crescent Nebula [Bicolor]

Technical card

Resolution: 4601x3470

Dates:June 8, 2019Aug. 25, 2019

Frames:
Baader Planetarium Baader 1,25" H-Alpha 7nm: 180x120" (gain: 139.00) -15C bin 1x1
Baader Planetarium Baader 1,25" O III 8,5nm: 90x180" (gain: 139.00) -15C bin 1x1

Integration: 10.5 hours

Darks: ~100

Flats: ~50

Flat darks: ~50

Avg. Moon age: 14.76 days

Avg. Moon phase: 30.58%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 2883508

RA center: 302.943 degrees

DEC center: 38.632 degrees

Pixel scale: 1.343 arcsec/pixel

Orientation: 91.162 degrees

Field radius: 1.075 degrees

Locations: Terrassensternwarte, Berlin, Germany

Data source: Backyard

Description

The following PixelMath Expressions were used to generate the bicolor channel combination:

R: iif(Ha > .15, Ha, (Ha*0.8)+(OIII*0.2))
G: iif(Ha > 0.5, 1-(1-OIII)*(1-(Ha-0.5)), OIII *(Ha+0.5))
B: iif(OIII > .1, OIII, (Ha*0.3)+(OIII*0.2))

Comments

Author

jdifool
jdifool
License: None (All rights reserved)
850
Like

Sky plot

Sky plot

Histogram

NGC 6888 - Crescent Nebula [Bicolor], 





    
        

            jdifool