Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  NGC 6357  ·  the War and Peace Nebula
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Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357, 



    
        

            robonrome
Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357
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Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357

Getting plate-solving status, please wait...
Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357, 



    
        

            robonrome
Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357
Powered byPixInsight

Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357

Technical card

Imaging telescopes or lenses: APM LZOS 130/780

Imaging cameras: ZWO ASI294MM Pro

Mounts: iOptron CEM70

Guiding telescopes or lenses: PrimaLuceLab 240mm guide scope

Guiding cameras: zwo asi224 mc

Focal reducers: Riccardi RIRED-M63

Software: Photoshop CC  ·  Aries Production astro pixel processor  ·  StarTools 1.7

Filters: Antlia SII 3.5nm  ·  Antlia 3.5nm Ha  ·  Antlia 3.5nm OIII

Accessory: ZWO EAF Focuser  ·  ZWO EFW 36mm  ·  PrimaLuceLab ECCO ECCO  ·  PRIMALUCE LAB Eagle 3s


Dates:May 4, 2021May 5, 2021May 6, 2021

Frames:
Antlia 3.5nm Ha: 70x300" (5h 50') (gain: 120.00) -5C bin 2x2
Antlia 3.5nm OIII: 50x300" (4h 10') (gain: 120.00) -5C bin 2x2
Antlia SII 3.5nm: 55x300" (4h 35') (gain: 120.00) -5C bin 2x2

Integration: 14h 35'

Darks: ~25

Flats: ~25

Bias: ~50

Avg. Moon age: 23.77 days

Avg. Moon phase: 33.28%

Bortle Dark-Sky Scale: 7.00

Temperature: 15.00


Basic astrometry details

Astrometry.net job: 4482906

RA center: 17h 25' 10"

DEC center: -34° 6' 39"

Pixel scale: 1.618 arcsec/pixel

Orientation: 270.755 degrees

Field radius: 0.779 degrees


Resolution: 2515x2385

Data source: Backyard

Description

I rarely "see" the objects that nebulae are named for... NGC6357 is variously named the Lobster Nebula, War and Peace, or Madokami nebula ... but to me it so obviously resembles a Praying Mantis that it will forever be that to me.

The "Final" here is simply a more croped version of the original which shows more of the nebula.

This SHO process is Ha heavy and taken over 4 nights with lots lost to cloud and resulting unstable guiding, keeping around 14.5hours worth of subs.

Stacked and pre-processed in APP and separately using the S, H and O channels from APP unstretched recombined and processed in Startools. I merged these two approaches in PS, but this image here owes far more to the APP process than what came from Startools which I am still building competence in - easy to get a decent result harder, for me, to get an excellent result.

Increasingly I find I'm getting best results combining in APP and doing gradient correction, star colour calibration and HSL selective colouration in APP then importing as TIF direct to PS and using the atronomy tools plug ins and selective masking for further targeted curves adjustment, colouration, saturation and sharpening.

Comments

Revisions

  • Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357, 



    
        

            robonrome
    Original
  • Final
    Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357, 



    
        

            robonrome
    C

C

Description: cropped

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Praying Mantis Nebula (aka Lobster aka War and Peace ect) NGC6357, 



    
        

            robonrome