16" RCOS @ f/11.3
Apogee U9 imager
SBIG 402 guider
Astrodon Series I LRGB


a= 30 min x 38, 1x1
OIII=30 min x 14, 1x1

R=  15 min x
16, 1x1
G=  15min x 1
0, 1x1
B=  15 min x 1
6, 1x1

Data acquired at

Processed with CCD
Inspector, Sigma
Combine, Neat Image,
PixInsight, and Adobe
    The Helix Nebula, NGC 7293
        Click on image to enlarge
HERE to see OIII version
HERE to see Bicolor version
The Helix Nebula is in
Aquarius, about 7000
lightyears distant,
spanning an area of 2.5
lightyears. It is one of the
largest planetary nebula
visible from earth. The
helical shape is in a
plane perpendicular to
the image, and therefore,
difficult to "see". This
image includes 36.5
hours of data, and was
processed to emphasize
the Ha emission. Two
other versions are also
available with the links to
the left. Finally, a short
video of the 3 images is
fun to watch and can be