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(IAAC) Obj: ngc 7048 - Inst: 20" f/5
Observer: Lew Gramer
Your skills: Intermediate
Date and UT of Observation: 1997-06-7/8, 07:00 UT
Location: Rumney, NH, USA (43N)
Site classification: rural
Limiting magnitude: 7.2 (zenith)
Seeing: 3 of 10 - pretty good (but hazy)
Moon up: no
Instrument: 20" f/5 truss dobsonian reflector
Magnification: 70x, 210x, 420x, 640x
Filters used: None, UHC
Object: ngc 7048
Category: Planetary nebula [3b]
Constellation: Cyg
Data: mag 11.3 size 60"x50"
RA/DE: 21h14m +46o17m
Description:
This funny-shaped animal is lost in smaller instruments or
worse skies, amid a magnificent field of Milky Way stars.
At 70x and 210x with no filter, the quirky 7048 was easily
visible as an irregular, filled haze, casually appearing
to touch a nearby (unrelated) star. Jumping to 420x, the
hazepatch actually seemed LESS irregular, as a bland disk
with clear separation from the nearby yellowish star to S.
With averted vision at 420x and especially 640x, the flat
disk suddenly began to show a hint of annularity (which a
later check of CCD images on the net confirmed), appearing
somewhat irregular toward the center. Along the outer edge
was a slight "lobe" of nebulosity to the N. Surprisingly,
using UHC didn't enhance the view, although it did increase
the impression of a ring slightly by darkening the center.
Worth a look if you're sweeping Cygnus' summer planetaries!