(IAAC) Obj: NGC 2392 (Eskimo nebula) - Inst: 20" f/4.4 Dobsonian

Your skill:intermediate
Date and UT of observation:1-3 December 1997 00.00-03.00 UT
Location & latitude:near Ayr South West Scotland lat 55 24'56"
Site classification:bright rural
Limiting magnitude (visual):6 (zenith) 
Seeing (1 to 5 - best to worst):2-3
Moon up (phase?):No
Instrument:20" f4.4 Dobsonian
Magnification:X150, X250
Filters used:None, OIII, UHC
Object:NGC 2392 Eskimo nebula
Category: planetary nebula
Object data:mag 9.1   47"
RA/DE: RA7 29.2' Dec 20 55' 
Description: A bright and spectacular planetary nebula. With no filter the
central star is very obvious in the oval nebula with its conspicuous
brightness difference between the inner and outer parts of the nebula, the
eskimo's face in the parka. Through a prism a sharp image of the nebula in
the green OIII line is superimposed on the continuous spectrum of the
central star.
Using the UHC filter the bright disc of the nebula shows a strong contrast
between the inner and the narrower outer section and with the surrounding
dark sky. The brighter inner oval seemed quite uniform, no sign of the
eskimo's face despite looking for it. It has a definite lilac tinge in the
UHC filter. The central star was not visible through the UHC or OIII filter.
With these filters the annular appearance described in the Webb Society's
Deep Sky Observer's Handbook Vol 2 was not observed. The unfiltered
appearance at high power was not recorded.
Regrettably since these were found using digital setting circles there is no
finder information for these objects.
|   nmartin@bonnyton.u-net.com    |
|"There are more things in heaven and earth ... than are dreamt of in your
philosophy"   (Hamlet, Act 1, Sc. 5)  |
Bonnyton House, Ayrshire,Scotland, UK. lat 55 24'56" N long 4 26' 00" W
Altitude 150 m.