Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  M 17  ·  M17  ·  NGC 6618  ·  Omega nebula  ·  Sh2-45
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The Swan or Omega Nebula, 



    
        

            Geoff
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The Swan or Omega Nebula

Imaging telescopes or lenses: Plane Wave Instruments CDK 12.5"

Imaging cameras: Finger Lakes Instruments Proline 16803

Mounts: AP900GTO

Guiding telescopes or lenses: Plane Wave Instruments CDK 12.5"

Guiding cameras: Starlight Xpress Lodestar guide camera

Software: PixInsight  ·  MaximDL

Filters: Astronomik Ha 12nm  ·  Astronomik Oxygen III 12nm  ·  Astronomik Sulfur II 12nm


Dates:Aug. 3, 2019

Frames: 45x600"

Integration: 7.5 hours

Avg. Moon age: 2.75 days

Avg. Moon phase: 8.34%


Astrometry.net job: 2856004

RA center: 18h 20' 40"

DEC center: -16° 9' 29"

Pixel scale: 1.450 arcsec/pixel

Orientation: 88.115 degrees

Field radius: 0.583 degrees


Resolution: 2048x2048

Locations: Wiruna Dark Sky Site, Ilford, NSW, Australia

Data source: Traveller

Description

Messier 17 is between 5,000 and 6,000 light-years from Earth and is some 15 light-years in diameter. Its total mass is about 800 solar masses and it is one of the brightest and most massive star forming regions in our galaxy.

The open cluster NGC 6618 is embedded in the nebulosity and it is the radiation from these young hot stars that light up the gases of the nebula.

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  • The Swan or Omega Nebula, 



    
        

            Geoff
    Original
  • Final
    The Swan or Omega Nebula, 



    
        

            Geoff
    B

B

Description: Colour version. OIII, SII added to Ha image

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The Swan or Omega Nebula, 



    
        

            Geoff