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Re: (IAAC) PK189+7.1 in GEM with 13" from AZ
Lew;
I use the Uranometria in combination with a Telrad and the
large 11X80 finder. I am generally pretty confident that the
object is within one degree of the place where the scope is
pointed by the time I am done star hopping. Going to a higher
power, 150X or 220X will show the disk or not, I don't choose
to go after really tiny PN's, I usually stay above 3 arcseconds
or so. At 150X with the 14mm Meade UWA eyepiece the 13" f/5.6
has a field of about 1/2 a degree so I can move the scope around
one FOV to each of the cardinal points. If that doesn't show
the nebula I put in the UHC and try the same tactic. If still
no luck, I will fiddle with higher power for 10 minutes or so,
that is about all my patience is good for. Between the star
hop, eyepiece swapping and filter screwing I will invest 25 to
30 minutes, but then I just enter "Could Not Find" in the notes
and move on. Because I don't put the itsy-bitsy PNs on my
list, I assume the dozen or so I haven't seen are just too faint
for the 13" or needed a better night.
Clear Skies;
Steve
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