Hemisphere:  Southern  ·  Contains:  M 20  ·  M 21  ·  NGC 6514  ·  NGC 6531  ·  Trifid nebula
Trifid Nebula, Messier 20, 


            Cory Schmitz
Trifid Nebula, Messier 20
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Trifid Nebula, Messier 20

Technical card

Imaging telescopes or lenses: Orion 8" f3.9 Astrograph

Imaging cameras: Canon 60Da

Mounts: CGEM DX

Guiding telescopes or lenses: Vixen Finderscope 9x50

Guiding cameras: Orion StarShoot AutoGuider

Focal reducers: MPCC

Software: PixInsight  ·  PHD Guiding  ·  Binary Rivers Backyard EOS

Basic astrometry details

Astrometry.net job: 340070

RA center: 18h 2' 28"

DEC center: -22° 56' 6"

Pixel scale: 1.100 arcsec/pixel

Orientation: 177.673 degrees

Field radius: 0.939 degrees

Resolution: 5130x3390


This version of messier 20, the Trifid Nebula, was just a quick target to shoot at the end of our last night imaging at the Rooikloof farm in Sutherland, South Africa, back in April 2014. Exceptionally dark and clear skies in the Karoo desert make for lots of data in a short amount of time. I'm way too happy with this image despite the short exposure time. Dark skies matter. Love the desert!

Image details:

7x 300s ISO800, 35minutes total exposure time
Canon 60Da
Orion 8" Astrograph, f/3.9
Celestron CGEM DX mount
Orion SSAG + 50mm guide scope

Data acquired with BackyardEOS
Guiding with PhD
Reduced and post-processed with PixInsight



Cory Schmitz
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


Trifid Nebula, Messier 20, 


            Cory Schmitz