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Monday, September 27, 2010

Sh2-142, the "Wizard Nebula"

Sh2-142 alias NGC 7380, in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.

An experimental image of Sh2-142, with suppressed stars.
I use a starless image in one of the processing steps. Sometimes I publish it, since the actual nebula can be better seen by this way.  

Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.

NGC 7380 is a catalog number of  the open star cluster inside Wizard nebula, SH2-142.
Nebula locates in constellation Cepheus, about 7000 light years from my home. 

A closeup

Technical details:

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.

Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 6,5Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 15x1200s, binned 1x1
S-II 1x1200s, binned 4x4
O-III 1x1200s, binned 4x4
I have used color data from an older, 2008,  wide field image of Sh2-142.

Technical details for image used for colors:


skotten76 said...

Very very nice wow!! What software do you use?

J-P Metsavainio said...


There is a list of used software at end of the blog post.