Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  M 20  ·  NGC 6514  ·  Trifid Nebula
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M20: Trifid Nebula under Brisbane city skies, Igor Chekalin
M20: Trifid Nebula under Brisbane city skies
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M20: Trifid Nebula under Brisbane city skies

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M20: Trifid Nebula under Brisbane city skies, Igor Chekalin
M20: Trifid Nebula under Brisbane city skies
Powered byPixInsight

M20: Trifid Nebula under Brisbane city skies

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Description

Image taken from the balcony in Brisbane City (Australia) during 22 nights July-October 2021.
Bortle 7 sky ("red" light pollution zone).

Canon EOS-Ra on TAL-250K (10" Klevtsov-Cassegrain) with 0.7x recucer/flattner MkII (F/6). EQ6-R mount.

Total exposure time is 65 hrs (effectively 40, see OIII/SII disclaimer)
12 hours - RGB
28 hours - Ha
25 hours OIII and SII. (Actually OIII was only slightly added to green channel and SII wasn't used at all. So OIII and SII was reserved for SHO palette version)

Ha+OIII+RGB composition

Comments

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  • Final
    M20: Trifid Nebula under Brisbane city skies, Igor Chekalin
    Original
  • M20: Trifid Nebula under Brisbane city skies, Igor Chekalin
    B

B

Description: Starless version

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M20: Trifid Nebula under Brisbane city skies, Igor Chekalin