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Contains:  NGC 6357
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NGC 6357 - the lobster, 



    
        

            Andrew Lockwood
NGC 6357 - the lobster
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NGC 6357 - the lobster

Technical card


Dates:Aug. 1, 2019

Frames: 120x300"

Integration: 10.0 hours

Avg. Moon age: 0.44 days

Avg. Moon phase: 0.21%


Basic astrometry details

Astrometry.net job: 2845091

RA center: 17h 24' 39"

DEC center: -34° 10' 40"

Pixel scale: 0.380 arcsec/pixel

Orientation: 0.355 degrees

Field radius: 0.407 degrees


Resolution: 6228x4554

Locations: home, perth, western australia, Australia

Data source: Backyard

Description

Not far from the Cat's Paw is the nebula NGC 6357 in Scorpius, which is variously referred to as the Lobster Nebula or the War and Peace nebula. I have no idea why. In the middle is a cluster of extremely large stars, the cluster is catalogued as Pismis 24, and one of the stars initially thought to be 300 solar masses (a record) turns out to be three 100 solar mass stars, which is still pretty ridiculously big.
These two nebulae are about 5500 light years from earth, and when viewed in widefield images of this regions appear a much darker red than the other HII regions nearby. I suspect there is significant reddening caused by galactic dust partially obscuring them.

Comments

Author

alocky
Andrew Lockwood
License: None (All rights reserved)
950
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NGC 6357 - the lobster, 



    
        

            Andrew Lockwood