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(IAAC) Obj: Gyulbudaghian's Nebula (GM 1-29) - Inst: 14.5" f4.5 Dob/Newt



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Observation Poster: Len Philpot <len@philpot.org>
Observer: Len Philpot
Your skills: Intermediate (some years)
Date/time of observation: 12/20/2003
Location of site: Catahoula Lake, LA (Lat 31:28:49, Elev ~60')
Site classification: Rural
Sky darkness: 6.4 <Limiting magnitude>
Seeing: 5 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 14.5" f4.5 Dob/Newt 
Magnification: 111, 185, 248
Filter(s): None
Object(s): Gyulbudaghian's Nebula (GM 1-29)
Category: Reflection nebula.
Class: 
Constellation: Cep
Data: mag   size 
Position: RA 20:46  DEC 68:
Description:
Although this was observed a couple of months back, it's an interesting 
enough object, hence this report.
This is a variable nebula in Cepheus that's slightly fan shaped and 
variable. It's illuminated by the variable star PV Cep, which itself 
varies between 18 and 11th mag. I jumped over to it from LBN 487 
around a 7th magnitude star (SAO 19158). LBN 487 itself was very 
obvious and a nice jumping-off point.
A couple of references to it can be found on Tom Polakis' website 
(http://www.psiaz.com/polakis/deepsky/gyul.html), the SkyHound 
website (http://www.skyhound.com/sh/archive/oct/GM_1-29.html) and the 
Astrim website (http://astrim.free.fr/gyulb.htm). I can't find a 
magnitude listed anywhere, unless I've overlooked it, but it comes 
recommended for a 10" or larger scope. It was just barely visible in 
the 14.5", although the fan shape did show up a bit from time to 
time. From an even darker site, I suspect it would fare much better.
Although it /was/ visible at 111x (15mm Panoptic), the added darkness 
(or should I say, "reduced brightness" :-) of the sky background at 
185x (9mm Nagler) helped more. I tried it also at 248x (6.7mm Meade
Ultra Wide Angle), but it really didn't help and the view and 185 was
still better on that night. Although as I mentioned, it /did/ appear
fan-shaped now and then, it was the exception rather than the rule.
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