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Started by RolandC, 08/18/2011 12:12PM
Posted 08/18/2011 12:12PM Opening Post
This ultra-faint nebula was discovered by an amateur, Matthais Krohnberger, while poring over data in the Digitized Sky Survey. The nebula is estimated to be 25 mag/arc sec., so it is extremely faint and probably cannot be seen visually in any amateur telescope.

This image was taken here at my observatory with the 305mm F3.8 Honders astrograph, a 4 hour total exposure with 600 sec subs, Baader narrow band OIII filter. Note the open cluster NGC6791 at the bottom of the image.

Attached Image:

RolandC's attachment for post 53929
Posted 08/18/2011 12:13PM | Edited 08/18/2011 12:15PM #1
This is a crop of the nebula itself, upscaled to 2x the original full size and processed in PS3. You can begin to see the structure and the "soccer ball" appearance.

There is a mag 10 star to the left of the planetary which has a small faint spiral galaxy just below it. Somewhat below and slightly to the left of the nebula is a very faint edge-on galaxy. Both of these showed up better in red light in a 20 minute exposure.

This may be the first amateur image of this very faint object.


Attached Image:

RolandC's attachment for post 141629
Posted 08/19/2011 04:18PM #2
Thanks all for your comments.

Keep shooting!