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(IAAC) Obj: NGC 3242, Ghost of Jupiter - Inst: 40" f/5 dob



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Observer: Mark G.Birkmann
Your skills: Intermediate (some years)
Date/time of observation: 1/14/2000, 9:30 UT (3:30 CST)
Location of site: New Haven, Missouri (Lat ~38, Elev ~700 feet)
Site classification: Rural
Sky darkness: 5 <1-10 Scale (10 best)>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 40" f/5 dob
Magnification: 235, 470, 858
Filter(s): none
Object(s): NGC 3242, Ghost of Jupiter
Category: Planetary nebula.
Class: 4 + 3b
Constellation: HYA
Data: mag pn is 8.6(p), central star is 13.3  size 25"
Position: RA 10:24m 46.1s  DEC -18:38' 33"
Description:
My favorite view of this planetary was at 235x.  The inner ring was an intense
blue green superimposed on a blue grey disc.  The inner ring maintained it's 
color at all powers although it became less intense as the power increased.
The outer ring was grey at all higher powers.  The central star was visible at
all powers, although it, like the nebula, became pretty fuzzy at 858x.  The
inner ring was elongated and was much thicker in the long dimension.  The outer
ring showed no detail other than a little brightening near the edges
corresponding to the short dimension of the inner ring.  An attempt to draw this
beautiful nebula can be seen at 
http://www.fortunecity.com/greenfield/twyford/637/drawings.htm
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Optional related URLs: http://www.fortunecity.com/greenfield/twyford/637/drawings.htm
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