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(IAAC) Obj: M11 (Wild Duck Cluster) - Inst: 4.5" Homemade Dobson reflector, f/8



  Observer: Ante Perkovic
Your skills: Intermediate (some years)
Date/time of observation: August 12th 2003, 1.05h
Location of site: Tugare, near Split, Croatia (Lat 43.4 N, Elev 250m)
Site classification: Rural
Sky darkness: 5.0 <Limiting magnitude>
Seeing:
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): M11 (Wild Duck Cluster)
Category: Open cluster
Class:
Constellation: Sct
Data: mag 5.8  size 14'
Position:
Description:
  25x: Very bright nebulosity with a bright star (actually 3 close 
stars, but I don't resolve them) at SE edge. Cluster has very sharp SE 
edge, while fading slowly in other directions. I estimated diameter to 
be 3' with direct vision and 4' with averted vision (the cluster didn't 
grow on the SE side). Bright close pair of stars can be seen around 5' 
SE of the cluster.
  48x: I see 4 individual stars in 3'15"-diameter cluster. With averted 
vision, cluster grows additional 10%.
  79x: 5 to 10 stars resolved and 3'15"-diameter grainy nebulosity in 
the background.

The cluster was 28 deg above the horizon.

This was the last of 10 objects I observed in Scutum this night. I don't 
think there  is anything interesting left in the Scutum for my 4.5" 
babydob beyond this 10 objects.