(IAAC) Obj: NGC6645 - Inst: 4.5" Homemade Dobson reflector, f/8

[run's]

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----- Original Message ----- 
From: Ante Perkovic <albireo at vip.hr>
To: IAAC <logs at visualdeepsky.org>
Sent: Wednesday, August 11, 2004 7:37 AM
Subject: (IAAC) Obj: NGC6645 - Inst: 4.5" Homemade Dobson reflector, f/8


>   Observer: Ante Perkovic
> Your skills: Intermediate (some years)
> Date/time of observation: July 22nd 2004., 1:15h
> Location of site: Kasjuni beach, Split, Croatia (Lat. 43.5 N, Elev. 0m)
> Site classification: Suburban
> Sky darkness: 5.0 <Limiting magnitude>
> Seeing: 5 <1-10 Seeing Scale (10 best)>
> Moon presence: None - moon not in sky
> Instrument: 4.5" Homemade Dobson reflector, f/8 ("babydob")
> Magnification: 25x, 48x, 79x
> Filter(s): None
> Object(s): NGC6645
> Category: Open cluster
> Class:
> Constellation: Sgr
> Data: mag 8.5  size 10'
> Position:
> Description:
>   25x: NGC6645 is 3 deg E of M18 and 2 deg N od M25, but I decided to 
> starhopp from M17. It took me entire 10 minutes to cross those 1.5 FOVs 
> (3 deg)! This is very dense area, just E of M24 and it's real pain to 
> navigate. Once I reach it, I easily recognized it as a 13'-long faint 
> nebulosity that looked more like a galaxy than like a open cluster! I 
> never saw an open cluster that was so galaxy-like. Just 30' to the E is 
> 30' long chain of 5 stars of mags 7 and 8.
>   48x: Averted vision helped me to see a few faint stars.
>   79x: 6 very faint stars with direct vision and nebulosity.
> 
> Open cluster NGC6647 is just 30' to the S.
> 
> 
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