NGC 7008 - The Fetus-Nebula.

Collaboration between Astrodon, Paul Mortfield and Stargazer-Observatory

This image is a L-L(O3)-R-R(Ha)-G-G(O3)-B. O3 and H-alpha courtesy Don Goldman and Paul Mortfield . click their names to navigate to their site.

Also available at NASA website.

Stargazer-Observatory: 25-27th June 2008: seeing 7-(8)/10; Transp. 8/10

Scope: 9 " TMB folded Apo f/9 - 5.7h total exp-time

CCD: SXVF H16 - 1.2 hours - luminance; 4 min subs; 1x1 bin 6 darks; 4.5 hours R,G,B 2x2 bin; 10 min subs; 6 darks for 2x2bin

Software: AstroArt4 image acqu. guiding. Maxim DL, CCD Stack for preprocessing

Processing: postprocess. PS CS2, Registax, Pix InSight LE

Astrodon (Don Goldman) and Paul Mortfield: 8-08

Scope: 16" RC f/8.9

CCD: 6 hours O3 and H-alpha (30 min subs 1x1 binned) Don's purpose was to add color to the stars from very short RGB data which was not sufficiently deep for the nebula.

Software: CCD Stack (DDP and Deconvolution), PS CS3.

Masterprocessing by Stargazer-Observatory.

O3 blendend as both, 33% lum and green-channel, Ha blended as 33% red-channel.


Located in the constellation Cygnus, some 1200 lightyears away, this planetary nebula, aka PK93+5.2, H I-192, h 2099, GC 4627 is a most spectacular object for a powerful telescope (say larger than 16" aperture). It appears rather bright in a 20" dobsonian, as its visual magnitude is 10m7. In blue, however, it is only 13m3 bright. It holds 1.4 arc minutes in diamter which is considerably large for a PN.

Discovered by William Herschel in 1787 the distinctive shape of the nebula donates the name, reminding the observer of an embryo. The dark hole which can be seen very well in the image near the center, origins back a long time ago, when a seperate nova blew this part of the nebula up.


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