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


Ha= 30 min x 38, 1x1
OIII=30 min x 14, 1x1
R=  15 min x 16, 1x1
G=  15min x 10, 1x1
B=  15 min x 16, 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 Ha version
HERE to see OIII 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 by using only
the Ha (red channel) and
OIII (blue channel) data to
synthesize the green
channel. 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 found