NGC 6357 Lobster Nebula (Martin Dowd)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: NGC 6357 · the War and Peace Nebula

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NGC 6357 Lobster Nebula

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NGC 6357 Lobster Nebula

This is only my second time capturing NGC 6357 commonly referred to the Lobster Nebula ( aka War and Peace Nebula ) First time was over 2 years ago using a OSC and Dualband which resulted in a poor image due to insufficient data and poor conditions.

This time using a bigger scope, a 2600MM with 3nm filters and significantly more data ……,
Captured over 2 nights ( 11 hours integration)
Waxing Moon 60% to 70%
Seeing conditions average
Bortle 8 City suburban skies
8”f5 Klaus Helmerich Carbon fibre Newtonian Reflector
Skywatcher EQ6-R pro mount
ZWO 2600MM cooled to -10C , Gain 100
ZWO 7x2” EFW
ZWO EAF
Orion 60mm guide scope with helical focuser
ZWO 120MM guide scope
PHD2 Multistar guiding ( total error avg 0.50 to 0.60 arc sec )
Antlia 3nm Filters
Ha 60 x 5min dithered subs
Oiii 39 x 5min dithered subs
Sii 37 x 5min dithered subs
Darks frames from Library
Flats Ha , Oiii and Sii
Flat Darks Ha, Oiii and Sii
Analysed , Calibrated, Stacked and Aligned in ASTAP
Processed in Startools V1.8 via Compose
Colour HST / SHO preset with saturation and colour bias adjustments

Although initial stretch was still quite noisy , the final image turned out much better than my previous attempt

Thanks for looking
Comments welcome
Martin

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