[Prev][Next][Index][Thread][Search][Objects]

(IAAC) Obj: M17 (Omega nebula) - Inst: 4.5" Homemade Dobson reflector, f/8



  Observer: Ante Perkovic
Your skills: Intermediate (some years)
Date/time of observation: July 22nd 2004., 0:45h
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): M17 (Omega nebula)
Category: Emission nebula
Class:
Constellation: Sgr
Data: mag 6.0  size 11'
Position:
Description:
  25x: Very bright nebula, 8'x2' in size, extended SE-NW, with 
additional bright area S of NW end that extends to the nearby 9.5-mag 
star. It looks very much like "Nike" logo. After few minutes, I noticed 
very faint diffuse halo, that makes nebula around 50% larger. Just 5' to 
the N is something like open cluster, as large as bright part of the 
nebula. This grouping contains around 10 moderately bright stars, all of 
the same brightness.
  48x: Nebula stays as large as before, but looks little wider at the NW 
end.
  79x: Nothing new