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(IAAC) Obj: NGC 7027 - Inst: 40" f/5 dob
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Observer: Mark G.Birkmann
Your skills: Intermediate (some years)
Date/time of observation: 9-4-2000, 5:45 UT (12:45 CDT)
Location of site: New Haven, Missouri (Lat ~38, Elev ~700 feet)
Site classification: Rural
Sky darkness: 4 <1-10 Scale (10 best)>
Seeing: 4, sometimes 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 40" f/5 dob
Magnification: 408x, 858x
Filter(s): none
Object(s): NGC 7027
Category: Planetary nebula.
Class: 3a
Constellation: Cygnus
Data: mag mag 10.4(p) size 14", central star mag 16.2
Position: RA 21h:07m 1.7s DEC +42:14' 10"
Description:
This little planetary is a fascinating object. The best view was at high
power, 858x using a 6.7mm meade uwa and paracorr. The color was blue
gray and the central star was not seen. The nebula was roughly
rectangular with a dark lane running through the short dimension a little
more than halfway down from the top. The northeast and southeast
corners appeared to be right angles. The northwest corner was a little less
than 90 degrees so that the west side sloped inward slightly from top to
bottom. These two sections were equal in brightness except for a bright
knot of nebulosity in the top section. The knot was about 3/5 of the way
down from the top of the top section on the west side. The nebulosity
around this bright knot was also slightly brighter to the western edge of the
nebula and to the south ending at the dark lane. The dark lane appeared to
widen to the south of the bright knot but this could have been an illusion
due to the difference in brightness on either side of the dark lane on this
side of the nebula. There was a hint of a surrounding envelope of
nebulosity and this was confirmed with the 24.5mm meade swa and 2x
barlow for a power of 408x. At this power the nebula was blue green and
the outer envelpe was seen all the way around the nebula. On the
northwest side of the nebula, however, the outer envelope was very faint
and this dark area widened as the distance from the nebula increased as
though this part of the nebula was shaded from the central star. The 13.7
mag star gsc 3176:242 was seen 43" to the west. A drawing of NGC 7027 can
be seen at http://www.fortunecity.com/greenfield/twyford/637/ngc7027.htm
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Optional related URLs: http://www.fortunecity.com/greenfield/twyford/637/drawings.htm
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