(IAAC) Obj: NGC 7635 Bubble Nebula - Inst: 17.5" f/5 truss with Dob Driver

[anonymous at sedna.atmob.org]

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Observation Poster: Mark Viol <mva at eyegasms.com>

Observer: Mark Viol
Your skills: Intermediate (some years)
Date/time of observation: 12:00am EDT, August 6, 2005
Location of site: Mount Forest, Ontario (Lat , Elev )
Site classification: Suburban
Sky darkness: 7 <1-10 Scale (10 best)>
Seeing: 7.5 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 17.5" f/5 truss with Dob Driver
Magnification: 106
Filter(s): UHC
Object(s): NGC 7635 Bubble Nebula
Category: Emission nebula.
Class: 
Constellation: Cas
Data: mag 11  size 15 min
Position: RA 23:20  DEC 61:12
Description:
The brightest part of the "bubble" is seen around 8.7 magnitude TYC 4279 1582.
The fainter part of the shell extends to the west and requires AV4*. 
A tiny patch of nubulosity surrounds a 6.9 magnitude star to the south.
A larger diffuse area to the NE is seen with AV3*.

*Averted Vision Scale (From the Webb Society. Unfortunately I do not have the 
name of the person who created this very useful scale. If you know who he/she is,
please drop me a line)

AV1  Object is seen with averted vision, however, once found, the object could 
occasionally be seen with direct vision.

AV2  Object is seen only with averted vision, however, it is held steady.

AV3  Object is only occasionally seen with averted vision as it “comes & goes” 
with the seeing conditions. In this case the object is seen more than 50% of the time.

AV4  Object is only occasionally seen with averted vision as it “comes & goes” with 
the seeing conditions. In this case the object is seen less than 50% of the time.

AV5  Object is only glimpsed with averted vision after continuously viewing the field 
for a few minutes or more.

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Optional related URLs: http://www.eyegasms.com/Sketching/NGC7635.html
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