Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Hourglass nebula  ·  Lagoon nebula  ·  M 20  ·  M 8  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6544  ·  NGC 6546  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid nebula
M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol
M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO)
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M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO)

M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol
M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO)
Powered byPixInsight

M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO)

Equipment

Imaging Telescopes Or Lenses
Skywatcher 80ED black diamond 600/80 (F7,5)
Imaging Cameras
Canon 450D modifié Astrodon
Mounts
Orion Sirius EQ-G (HEQ5) - belt mod
Filters
Astronomik CCD SII 12nm Canon EOS Clip · Astronomik CCD OIII 12nm Canon EOS Clip · Astronomik CCD Ha 12nm Canon EOS Clip
Accessories
Lacerta Flatfieldbox 290mm · Pierro-Astro Masques de BAHTINOV · Pierro-Astro USB autoguider · Televue .8 Reduce/flattener for TV-85
Software
Adobe Phosotshop CS5 · Adobe Lightroom 5.4
Guiding Telescopes Or Lenses
Orion Short Tube 80/400
Guiding Cameras
iNova PL1-M

Acquisition details

Dates:
Aug. 20, 2017 ·  Aug. 21, 2017 ·  Aug. 15, 2018
Frames:
Astronomik CCD Ha 12nm Canon EOS Clip: 24x360" (2h 24') ISO800 bin 1x1
Astronomik CCD OIII 12nm Canon EOS Clip: 18x360" (1h 48') ISO800 bin 1x1
Astronomik CCD SII 12nm Canon EOS Clip: 5x360" (30') ISO800 bin 1x1
Integration:
4h 42'
Darks:
4
Flats:
26
Bias:
100
Avg. Moon age:
20.65 days
Avg. Moon phase:
8.05%
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 3250333

RA center: 18h04m10s.3

DEC center: -23°5551

Pixel scale: 2.254 arcsec/pixel

Orientation: 270.202 degrees

Field radius: 1.504 degrees

Resolution: 4002x2660

Locations: Observatoire personnel, Tournefeuille, Haute-Garonne, France

Data source: Own remote observatory

Description

HaO-SHO

Luminance with Ha & OIII layers, Color with Ha,OIII,SII - filters narrow band 12nm

Ha:2h24, OIII:1h48, SII:30mn exposure time at 800 iso (Tournefeuille, France)

600/80 mm Refractor – 450D EOS filter removed - Ha, OIII, SII filters

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop

Final touch with Lightroom

Comments

Revisions

  • M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol
    Original
  • M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol
    B
  • Final
    M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol
    C

B

Description: New pretreatment with SIRIL software, New SHO treatment technic, New noise reduction with Noiseware plugin

Uploaded: ...

C

Description: Aigrettes main star correction

Uploaded: ...

Sky plot

Sky plot

Histogram

M8 & M20 - The Lagoon and Trifid Nebulae (Ha-SHO), 



    
        

            Olivier Ravayrol