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Contains:  NGC 6357
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NGC 6357 (Lobster Nebula)

Technical card

Resolution: 3954x2953

Dates:June 24, 2017

Frames:
Astronomik Ha 6nm 1.25": 39x900" -20C bin 1x1
Astronomik OIII 6nm 1.25": 22x1200" -20C bin 1x1
Astronomik SII 6nm 1.25": 21x1200" -20C bin 1x1

Integration: 24.1 hours

Avg. Moon age: 0.45 days

Avg. Moon phase: 0.23%

Astrometry.net job: 2140705

RA center: 261.249 degrees

DEC center: -34.144 degrees

Pixel scale: 1.016 arcsec/pixel

Orientation: 181.401 degrees

Field radius: 0.696 degrees

Locations: Wiruna, Ilford, New South Wales, Australia

Data source: Traveller

Description

NGC 6357 is a diffuse nebula spanning about 400 light years, approximately 6,000-8,000 light years from Earth, and can be seen in the constellation Scorpius. It is also known as the ‘Lobster Nebula’ or the ‘War and Peace Nebula’.

The central blue region in this image is home to Pismis 24, a star cluster that includes some of the most massive stars in our galaxy, some hundreds of times more massive than our own sun.

The picture was formed by combing individual images taken with three different filters that allow imaging of ionised Hydrogen (Ha), Oxygen (OIII) and Sulphur (SII). It was processed in PixInsight using the Hubble Space Telescope palette (Red = SII, Green = Ha, Blue = OIII). The final image was re-sampled by 120% for aesthetic reasons.

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Author

dean.carr
Dean Carr
License: None (All rights reserved)
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NGC 6357 (Lobster Nebula), 





    
        

            Dean Carr