Planetary Nebula in Cygnus

Uploaded 9/10/2001

This surprisingly beautiful planetary nebula in Cygnus near the Cepheus border is 13.3 magnitude and 85 arcseconds across. Note however something is very unusual about this object. Look closely at the yellow star to the right of the 13.2 mag central star, and you will see a dark halow around it with a bright rim. No, its not a deconvolution artifact, but real. Originally, years ago, this was thought to surely be an example of a second planetary nebula, superimposed on the larger one. But recent research indicates this is incorrect, and the explanation is a nova blew a dark hole in the planetary, and left a bright rim around it.

I particularly like the pastel pink core, surrounded by a mostly bipolar pair of rims, sea green in color.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 50:10:10:18 (RGB Binned 2x2)
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing 8/10, Transparency 8/10
Outside Temperature:  20 C
CCD Temperature:  -20 C
Processing:  Maxim DL, Photoshop, PW Pro.




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