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(IAAC) Obj: NGC6645 - Inst: 4.5" Homemade Dobson reflector, f/8
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To: IAAC <logs@visualdeepsky.org>
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Subject: (IAAC) Obj: NGC6645 - Inst: 4.5" Homemade Dobson reflector, f/8
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From: Ante Perkovic <albireo@vip.hr>
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Date: Wed, 11 Aug 2004 12:37:26 +0200
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User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.0.1) Gecko/20020920 Netscape/7.0
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.