Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  NGC 6357  ·  NGC6357  ·  Sh2-11  ·  the War and Peace Nebula
Getting plate-solving status, please wait...
NGC 6357 RGBSHO, 



    
        

            Tom Peter AKA Astrovetteman
Powered byPixInsight

NGC 6357 RGBSHO

Imaging telescopes or lenses: Takahashi TOA-150 Takahashi TOA 150

Imaging cameras: FLI ML16200

Mounts: Astro-Physics 1600 with Absolute Encoders A-P 1600GTO-AE

Guiding telescopes or lenses: Takahashi TOA-150 Takahashi TOA 150

Software: PinInsight 1.8  ·  Adobe Photoshop CS5 Photoshop CS5

Filters: Chroma technology SII 50mm Unmounted  ·  Chroma technology OIII 3nm 50mm Unmounted  ·  Chroma technology Ha 3nm 50mm Unmounted  ·  Chroma technology Red 50mm Unmounted  ·  Chroma technology Green 50mm Unmounted  ·  Chroma technology Blue 50mm Unmounted


Dates:March 1, 2021

Frames:
Chroma technology Blue 50mm Unmounted: 19x600" -25C bin 1x1
Chroma technology Green 50mm Unmounted: 24x600" -25C bin 1x1
Chroma technology Ha 3nm 50mm Unmounted: 15x1800" -25C bin 1x1
Chroma technology OIII 3nm 50mm Unmounted: 14x1800" -25C bin 1x1
Chroma technology Red 50mm Unmounted: 24x600" -25C bin 1x1
Chroma technology SII 50mm Unmounted: 14x1800" -25C bin 1x1

Integration: 32.7 hours

Darks: ~25

Flats: ~25

Flat darks: ~25

Bias: ~50

Avg. Moon age: 17.13 days

Avg. Moon phase: 93.78%

Bortle Dark-Sky Scale: 1.00


Astrometry.net job: 4267167

RA center: 17h 24' 42"

DEC center: -34° 12' 4"

Pixel scale: 1.129 arcsec/pixel

Orientation: 5.545 degrees

Field radius: 0.889 degrees


Resolution: 4436x3536

Locations: Deep Sky West-Chile, El Sauce, Chile

Data source: Amateur hosting facility

Remote source: DeepSkyWest

Description

NGC 6357, also know as the Lobster Nebula, lies at a distance of 6,500 Light-years from Earth in the constellation Scorpius. There are numerous massive stars lying within this extremely large emission nebula, notably the cluster Pismis 24 located within the large blueish hole near the center, has some of the most massive stars known in our galaxy, many of them being over 100 times the mass of our Sun. The central region of the nebula has numerous pillars of dusty molecular gas which probably hide massive protostars. The intricate shapes of the gases within the nebula are carved out by the stellar winds and huge amounts of radiation from the young and massive stars that we can see and from those embedded in the gas clouds.
This image was a REAL pain to process! I finally decided on the traditional Hubble Palette and then using ColorMask and curves to try to get the colors to be pleasing (trying to get the Blue to show up in the central regions was a REAL challenge) and then processing a separate RGB image to allow me to substitute RGB stars for NB stars. I'm still not completely satisfied, so I'll keep trying to make this better.
Anyway, hope ya like it!
Tom

Comments

Sky plot

Sky plot

Histogram

NGC 6357 RGBSHO, 



    
        

            Tom Peter AKA Astrovetteman