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
Hemisphere:  Southern  ·  Contains:  Eagle nebula, M 16, NGC 6611
Getting plate-solving status, please wait...
Eagle Nebula (M16) - a new Synthetic RGB formula, 


            Frank Kane
Eagle Nebula (M16) - a new Synthetic RGB formula
Powered byPixInsight

Eagle Nebula (M16) - a new Synthetic RGB formula

Technical card

Imaging cameras: Atik 383L+

Mounts: Software Bisque Paramount MyT

Software: Software Bisque The Sky X Pro  ·  Adobe Phosotshop CS6  ·  Pleiades Astrophoto PixInsight

Filters: Astronomik 6nm H-alpha OII and SII

Accessory: MoonLite Focuser w/High Res Stepper Motor

Dates:May 17, 2019

Frames: 52x240"

Integration: 3.5 hours

Avg. Moon age: 13.30 days

Avg. Moon phase: 97.59%

Basic astrometry details job: 2703878

RA center: 18h 18' 47"

DEC center: -13° 48' 32"

Pixel scale: 1.114 arcsec/pixel

Orientation: 356.718 degrees

Field radius: 0.641 degrees

Resolution: 2493x3310

Locations: My Driveway, Winter Springs, FL, United States

Data source: Backyard


The Eagle Nebula, imaged with narrowband filters - and my first use of a new synthetic RGB formula I came up with:

R = 0.5*Ha + 0.5*SII
G = 0.55*OIII + 0.094*Ha
B = 0.295*OIII + 0.1*Ha

This was derived based on known ratios between Hydrogen-alpha and Hydrogen-beta emissions, and between the two main emission lines of OIII. I converted each emission wavelength to RGB colors, and combined them mathematically to come up with this formula for use in PixelMath. Basically it's a new physically-based attempt to synthesize RGB images from narrowband filters on emission nebulae.

This image was totally unguided with 4-minute subs, thanks to my Paramount MyT.



Frank Kane
License: None (All rights reserved)


  • Final
    Eagle Nebula (M16) - a new Synthetic RGB formula, 


            Frank Kane


Description: Further refined the PixelMath to correct for how O3 data is captured. No color correction applied; this is purely the result of the RGB mapping used.

Sky plot

Sky plot


Eagle Nebula (M16) - a new Synthetic RGB formula, 


            Frank Kane