(IAAC) Obj: NGC 281 - Inst: 13" f/5.6 newtonian German Eq.


Observer: Steve Coe
Your skills: Advanced (many years)
Date/time of observation: 24 Jan 98
Location of site: Sentinel, Arizona (Lat 33, Elev 1600)
Site classification: Rural
Sky darkness: 8 <1-10 Scale (10 best)>
Seeing: 6 <1-10 Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 13" f/5.6 newtonian  German Eq.
Magnification: 100, 150, 
Filter(s): UHC
Object(s): NGC 281
Category: Emission nebula
Constellation: CAS
Data: mag 7.4  size 4'
Position: RA 00:5319  DEC +568:3720
In the 13" at 100X with no filter this nebula is pretty faint, large, 
irregularly round and has a pretty low surface brightness.  It is visible
but no obvious.  There are 10 stars involved, including an obvious triple
star on the NW side of the nebula.  Adding the UHC filter makes a big
difference to the contrast, now the nebula is unmistakable.  Not so much
larger, just much higher contrast with the background.  This nebula has
been called by several names, the most popular in Arizona is "The Pacman
Nebula", it appears more like a "Shrimp" on this night.
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