(IAAC) Object: NGC 2392 (eskimo nebula) INST: 16" Newt f/4.59

Observer:  Todd Gross
Your skill:  Intermediate 
Date and UT of observation: 10/24/97 0755 GMT
Location & latitude: 22 miles west of Boston, Ma. 42.3N
Site classification: Suburban
Limiting magnitude (visual): 4 (estimated)4 (est) in vicinity of object
Seeing (1 to 10 - worst-best):  3
Moon up (phase?): Yes, 40%
Weather: Partly cloudy (high veil of cirrus clouds)
Instrument: 16" Newtonian-dob w. 96/99% coatings f/4.59
Magnifications: 70x, 143x, 250\x, 310x
Filters used: UHC
Object: NGC 2392 (Eskimo nebula)
Constellation: Gemini vicinity
Object data:  Planetary Neb.

Seeing was poor, and there was a high veil of clouds. Although
I did not see the double envelope structure,  the planetary nebula
The Eskimo Nebula, was very interesting because of the difference
between the view with the UHC filter, and without.

At low power this tiny fuzzball had a blue-green color, less obvious
as magnification increased. With high magnification the fuzzball
looks like an unresolved, but very bright, tiny, globular cluster, completely
and symettrically round, with a very noticeable brightening in the center.
HOWEVER, with NO UHC filter, it appears as a roughly evenly illuminate
circle of nebulosity, with a perfectly centered, and easy to see central star.

- Todd
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Email: toddg@weatherman.com    Work Phone# (617)725-0777