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Contains:  Trifid nebula, M 20, NGC 6514
Getting plate-solving status, please wait...
M20 Trifid Nebula #9, 


            Molly Wakeling

Technical card

Resolution: 5656x4328

Dates:July 12, 2018July 13, 2018

Astronomik Blue 1.25" Type 2c: 9x180" (gain: 139.00) -20C bin 1x1
Astronomik Green 1.25" Type 2c: 8x180" (gain: 139.00) -20C bin 1x1
Astronomik Luminance 1.25" Type 2c: 17x180" (gain: 139.00) -20C bin 1x1
Astronomik Red 1.25" Type 2c: 6x180" (gain: 139.00) -20C bin 1x1

Integration: 2.0 hours

Darks: ~20

Bias: ~20

Avg. Moon age: 14.62 days

Avg. Moon phase: 0.41%

Bortle Dark-Sky Scale: 4.00 job: 2351827

Data source: Backyard


The tracking on my Celestron AVX loaded down with the 8-inch SCT and Borg for a guider is still not good enough for 5-minute subs, but 3-minute subs on my more sensitive ZWO camera do all right!



Molly Wakeling
License: None (All rights reserved)


  • M20 Trifid Nebula #9, 


            Molly Wakeling
  • Final
    M20 Trifid Nebula #9, 


            Molly Wakeling


Processed using PixInsight - follow that little adventure here on my blog. That PhotometricColorCalibration process is amazing! This version only has 12L frames; I used SubframeSelector to cut a few less-good ones.


M20 Trifid Nebula #9, 


            Molly Wakeling