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(IAAC) Obj: NGC 7635 (Bubble Nebula) - Inst: 20" f/5 dob newt



Observer: Lew Gramer
Your skills: Intermediate
Date and UT of Observation: 1997-07-31/08-01, 06:40 UT
Location: Savoy, MA, USA (42N, elev 700m)
Site classification: rural
Limiting magnitude: 7.2 (zenith)
Seeing: 7 of 10 - pretty good, intermittent haze
Moon up: no
Instrument: 20" f/5 Tectron truss-tube dob Newtonian reflector
Magnification: 170x, 290x, 360x
Filters used: None, UHC
Object: ngc7635 (Bubble Nebula)
Category: Emission nebula (with planetary features)
Constellation: Cas
Data: mag 8.5 (star 6.9)  size 15'x8'
RA/DE: 23h21m  +61o11m
Description:
This famous but faint enigma was easily found 30' or so SW of M52,
just NE of mag. 7 star HD 220057. The brightest region surrounds a
pretty double of mags 10 and 11, wth a third star mag 14 involved
to the NW. Diffusely visible to direct vision, with some mottling
apparent, especially to W and SW. To averted vision, a distinct
long arc of nebulosity stretches N, curving gracefully around to
the E, toward a mag. 11 star 15' away. Three distinct hazes were
also visible to the S and SW of the main nebulosity, all needing
averted vision (and usually field motion), and all showing little
detail other than an irregular outline. Yet another "hook" of neb-
ulosity was faintly visible to averted vision, arcing S and then
SW of the main nebula. Quite a sight, when viewed with patience!