(IAAC) Obj: M18 (NGC 6613) - Inst: 12.5" f/6.5 Cave equatorial Newtonian

Observer: Dave Mitsky
Your skills: Intermediate (some years)
Date/time of observation: 6/18/98 06:10 UT
Location of site: Naylor Observatory http://www.msd.org/obs.htm (Lat 40.1d N, 76.9d W, Elev 570')
Site classification: Exurban
Sky darkness: ~5.0 <Limiting magnitude>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 12.5" f/6.5 Cave equatorial Newtonian
Magnification: 121x
Filter(s): None
Object(s): M18 (NGC 6613)
Category: Open cluster.
Class: II 3 p
Constellation: Sagittarius
Data: mag 6.9  size 9.0'
Position: RA 18:19.9  DEC -17:08
M18 is a sparsely populated open cluster about a degree south of M17.
It consists of about 20 stars of varying brightness that span about 10
light years.  This 32 million year old cluster is some 4900 light
years away.
At the eyepiece M18 appeared as a large but scattered stellar group.
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