Hi Paul,
I noticed that fuzzy as well and just assumed it was a galaxy. I
checked the Digitized Sky Survey
and it shows the galaxy pretty clearly.
The ability of these commercial CCDs to pull out these dimmer objects
is really amazing. It is one of the things that I really enjoy about
this hobby.
Thanks
Tom C
Paul Sterngold wrote:
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Hi Tom,
Very nice images. In the combo shot with 5905 at the center, there appears
to be another, bright FFO (galaxy?) close to the bright star that is just
to the left and above center of the frame. Is that a deformed star
(unlikely), some kind of reflection in the optical train (unlikely), or a
legitimate FFO?
Cheers,
Paul Sterngold
--- Julie and Tom Carrico <carrico@...> wrote:
Hi all,
We had some okay nights at our observatory in central Oregon this last
weekend. 3 nights were clear with reasonable seeing, but some high
clouds. Two other nights had us chasing holes in the clouds. Still,
any night under the stars is wonderful.
Continuing to work out all the bugs on the G-11. When it is all tuned
up, it works just great. However, it seems to be very sensitive to
balance in RA. During guiding, the mount is kept heavy to the east.
This means that with the RA clutch loose, the scope will move and you
must pay attention when moving from the sky. If it is not that heavy,
the RA tracking suffers.
I have also found that the tracking rate that works best is 1.3 to 1.5
seconds with a delay between corrections (as set in MaxImCCD) of 0.8
seconds. If the delay is not set or is set too low, the mount seems to
chase corrections all over the place.
With the mount balanced and the guiding rate and delay properly set,
and when used with my 4" Tak (820 mm focal length), the tracking error
is usually +/- 0.2 pixels with an occassional flier of .7 or .8 that
gets corrected immediately. The camera is an ST-7E.
My latest images are:
The bubble nebula has been retouched to remove the blooming, as has
the cocoon. Tough images that will get another look next month.
I have learned that imaging at f/8 just requires lots of exposure. The
galaxy images could have used 2x the time I used here. That's also for
next month.
There will be more images posted later this week.
Thanks
Tom Carrico
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