More Planetary Nebulae
- Last night was supposed to be cloudy. As I stepped outside it was
beautifully clear so the 25" got set up in the driveway. Even with
that damn moon casting a shadow of the telescope on the driveway I
still thought it would be fun to try seeing a few small planetary
nebulae. Though I did use a 25", all of these should be visible in an
8" scope under a dark sky. These are interesting because they are
quite bright, yet in more esoteric catalogs that Messier or NGC.
IC 4997 Sge
A bright and gloriously green nearly stellar PN at 200x. I knew it
was a PN even unfiltered because of its tell-tale color. The OIII
fitler confirmed, as it outshown everything else in the field of
view. It blinks beautifully with 9.9 mag star GSC1631:1973, only 1.1'
to the SW.
IC 1747 Cas
A small, slightly oblong shaped PN, fairly faint. Responds well to
OIII filter. There are a number of stars in the field, mostly
brighter than IC 1747. With the OIII fitler, the nebula nearly
outshines them all.
Hu 1-1 Cas
I can't belive this is the first time I have ever observed this
before, as it's quite bright. It's not stellar with averted vision,
but nearly so. Quite blue in color. Responds well to OIII filter.
Vyssotsky 11 Cas
A small PN, but extended enough and bright enough for me to recognize
it as a PN immediately, even without a filter on a bright moonlit
night. By staring directly at it it disappears completely. MegaStar
shows an associated 12.9 mag star superimposed over the PN, but I
only see its faint 14.1 mag central star.
Well, there you have it. Hope you see them on the next clear night.
If you do, or have already done so please let me know.