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

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

Acquisition details

Dates:
May 4, 2021 ·  May 5, 2021 ·  May 6, 2021
Frames:
Antlia 3.5nm Narrowband H-alpha: 70×300(5h 50′) (gain: 120.00) -5°C bin 2×2
Antlia 3.5nm Narrowband Oxygen III: 50×300(4h 10′) (gain: 120.00) -5°C bin 2×2
Antlia 3.5nm Narrowband Sulfur II: 55×300(4h 35′) (gain: 120.00) -5°C bin 2×2
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: 17h25m10s.8

DEC center: -34°0639

Pixel scale: 1.618 arcsec/pixel

Orientation: 270.755 degrees

Field radius: 0.779 degrees

Resolution: 2515x2385

File size: 9.0 MB

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

Uploaded: ...

Sky plot

Sky plot

Histogram

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



    
        

            robonrome

In these public groups

Southern Hemisphere Astro