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(IAAC) Obj: M 8, NGC 6530 - Inst: 120 mm KONUS refractor,f/8.33, eq. mount



Observer: Natko Bajic
Your skills: Intermediate (some years)
Date/time of observation: 11. July 2001.
Location of site: Vinisce, near Split, Croatia (Lat
44.5, Elev 10 m)
Site classification: Rural
Sky darkness: 5.5 <Limiting magnitude>
Seeing: <I-V Seeing Scale (I best)>
Moon presence: None - moon not in sky
Instrument: 120 mm KONUS refractor, f/8.33, equatorial
Magnification: 40x, 100x
Filter(s): None
Object(s): M 8, NGC 6530
Category: Diffuse nebula, open cluster
Class:
Constellation: Sgr
Data: mag 5.0, 4.6  size 35.0'x30.0', 15.0'
Position: RA 18h 5m  DEC -24
Description:
Lagoon nebula, magnificent object in Sagittarius, seen
easily with the naked eye. At 40x takes up about 1/3
FOW. At first look, it consists of two parts separated
by a dark dust lane. Brighter one ("central part") is
gradually brighter toward its own center, while
fainter, situated to the east or NE of central nebula
part, is uniform and brighter toward dark streak by
central part. Longer observing and averted vision
gives better view, showing second part much more
extended and fading out very slowly in the darkness
toward NE. It also helps to see another, the faintest
part of M 8, situated southern of the central part,
separated also by a dark stripe. It is large, uniform,
and slowly fades out. 
NGC 6530 is a bright open cluster involved in this
nebula, situated eastern of nebula center. It is
perfectly round and contains about 20-25 stars of
similar brightness. Sketch is available at the URL
mentioned below.
--
Optional related URLs: http://natkobajic.netfirms.com
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