Celestial hemisphere:  Southern  ·  Constellation: Carina (Car)  ·  Contains:  NGC 3199
Getting plate-solving status, please wait...
NGC 3199: A WR Nebula, 



    
        

            Alex Woronow
NGC 3199: A WR Nebula
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NGC 3199: A WR Nebula

Getting plate-solving status, please wait...
NGC 3199: A WR Nebula, 



    
        

            Alex Woronow
NGC 3199: A WR Nebula
Powered byPixInsight

NGC 3199: A WR Nebula

Acquisition details

RA center: 10h17m34s.1

DEC center: -57°5558

Pixel scale: 0.961 arcsec/pixel

Orientation: 0.073 degrees

Field radius: 0.472 degrees

Resolution: 2500x2500

File size: 32.4 MB

Data source: Amateur hosting facility

Remote source: DeepSkyWest

Description

NGC 3199: A WR Nebula

OTA: PlaneWave 17” f/6.8
Camera.FLI ML16803
Observatory: Deep Sky West, Chile

EXPOSURES:   
R: --    8 x 600 seconds
G: -- 11 x 600
B: -- 10 x 600
H: -- 14 x 1800  
S: -- 18 x 1800
O: -- 16 x 1800
Total exposure    28.7 hours

The published image is about 1/3 scale
Image Width: 40 arc-minutes
Processed by Alex Woronow (2022) using PixInsight, Topaz, 3DLut

The spherical nebula has been thrown off by the Wolf-Rayett star WR-18. It is colliding with a pre-existing cloud, probably at least in part an earlier, similar event. The cloud receives stimulation from the unusually hot and luminous WR-18.

Often imagers manage to capture only the bright arc of clouds and consequently call this the “Banana Nebula.” This image shows the fuller extent of the nebula, and the “banana” portion (at the right) is where the cloud is interacting most strongly with the pre-existing cloud, and perhaps it is piling up there. Toward the lower left, arcs of the cloud bulge farther away from the center point, where they likely have not encountered too much resistance.

This image uses isolated emission-line components from the SHO captures, discarding the continuum emissions. The luminance channel was assembled from the SHO lines plus a small contribution from the RGB. The resulting image, based on a true-color approximation from the SHO lines, was calibrated photometrically. The nebula was processed with the stars removed (via StarNet2), and the stars were copied back in toward the end of the processing. Copying the stars in does not cause the sometimes massive star color shift that arithmetically adding the back does.

Hope you enjoy this strange creature and all its details…
Alex Woronow

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NGC 3199: A WR Nebula, 



    
        

            Alex Woronow