NGC6826 - The Blinking Planetary

Planetary Nebula in Cygnus

Uploaded 7/14/05

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 There are a few bright planetary nebula that show extended faint shells of material around the normal visible portion with long exposures. This object is the combination of an extremely bright central star, very bright planetary nebula and an exceedingly dim outer shell making conventional processing out of the question. Bright in 9.8th magnitude for the planetary with a 10.4 magnitude central star. The planetaries main inner core is listed at 38 arcseconds, which is small for my half a degree field. But that extended envelope is many times larger. You can see the faint diffuse diffraction spikes from the central star superimposed on the outer shell of the planetary.

This image is heavily stretched and reveals many very faint background galaxies. The brightest are two 16th magnitude objects to the right of the nebula, which you can see in the larger images. Also note the bright patches on the "rim" of the outer shell.


Two versions of this image were made, one showing the conventional representation of the inner core and normal stars. A second highly gamma stretched image was then made, which of course bloats out all the stars as well. But this image also revealed hordes of background galaxies. The two images were combined with layer masking to show the best of both images.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 60:20:20:20 RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 4.5 arcsec (Maxim DL - 10min subframe), Transparency 6/10 Outside Temperature: 60F CCD Temperature: -20 C Processing Tools: Maxim DL, Photoshop, PixInsight, RW Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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