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Contains:  B85, M 20, M20, NGC 6514, Sh2-30, Trifid Nebula, Trifid nebula
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M20 - Trifid Nebula (LRGB) from skies Bortle 9 (Reprocessed from scratch)

Technical card

Dates:May 15, 2020May 17, 2020

Optolong 2" UV/IR Cut: 164x120" (gain: 100.00) -25C bin 1x1
SVBONY B_CCD 2" Filter: 50x120" (gain: 100.00) -25C bin 1x1
SVBONY G-CCD 2" Filter: 50x120" (gain: 100.00) -25C bin 1x1
SVBONY R-CCD 2"Filter: 50x120" (gain: 100.00) -25C bin 1x1

Integration: 10.5 hours

Darks: ~50

Flats: ~62

Avg. Moon age: 23.88 days

Avg. Moon phase: 32.35%

Bortle Dark-Sky Scale: 9.00 job: 3529888

RA center: 18h 2' 39"

DEC center: -22° 57' 48"

Pixel scale: 0.722 arcsec/pixel

Orientation: -26.528 degrees

Field radius: 0.574 degrees

Resolution: 4578x3444

Locations: Casa, Córdoba Capital, Córdoba, Argentina

Data source: Backyard


Hi everyone!!!

I reprocessed from scratch the image because I’ve notice that some fine details were lost in some step of the process.

Today I wanted to share with you the First Light of my new Newtonian Telescope, a SW 250 pds (254/1200) F4.7, which turned to be 254/1086 when used with the SW 0.9 Coma corrector, so the setup is a F4.28!!!.
Also, this was an excellent experiment for me, because thanks to Optolong, which gave me a L-Pro filter as a prize of an astrophotography contest, I could test how good can be a LRGB image from skies bortle 9 with employing an anti-pollution filter.
So I stacked the LRGB filters with the L-Pro (wich was screwed on the CC) and the result really amazed me.

I Hope you enjoy it, clear skies!!

Ps1: I leave you here the technical data since here in astrobin I can not describe the stack of filters:
*Gain 100, -25 º C, R-CCD 2" Svbony + L-Pro 2" Optolong, 50x120"
*Gain 100, -25 º C, G-CCD 2" Svbony + L-Pro 2" Optolong, 50x120"
*Gain 100, -25 º C, B-CCD 2" Svbony + L-Pro 2" Optolong, 50x120"
*Gain 100, -25 º C, L 2" Optolong + L-Pro 2" Optolong, 197x120"

PS2: I want to dedicate this image to Diego Gravinese and Juan Filas, two great persons that I have the pleasure to interact with, learn from them, and enjoy with them. Thanks Diego and Juan!!



Ariel Cappelletti
License: None (All rights reserved)

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M20 - Trifid Nebula (LRGB) from skies Bortle 9 (Reprocessed from scratch), 


            Ariel Cappelletti