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(IAAC) Obj: IC 4756 - Inst: Vixen 9x63 binoculars

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Observation Poster: Stéphane Meloche <stephanemeloche@videotron.ca>

Observer: Stéphane Meloche
Your skills: Intermediate (some years)
Date/time of observation: 2005/08/04 4h09 UT
Location of site: Coaticook (Qc), Canada (Lat , Elev )
Site classification: Exurban
Sky darkness: 5,6 <Limiting magnitude>
Seeing:  <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: Vixen 9x63 binoculars
Magnification: 
Filter(s): 
Object(s): IC 4756
Category: Open cluster.
Class: 
Constellation: Ser
Data: mag 4.6  size 39'
Position: RA 18:39  DEC 05:27
Description:
In Serpens Cauda, at ~ 4½°W of Alya. Open cluster open of an incredible beauty at binoculars. IC 4756 is very wide, whose diameter is of approximately 3° according to my estimate. The stars are too much numerous to be be counted, but I estimate however the number between 70-80 stars visible at 9x. By studying the object more, 3 sections are distinguished particularly. The first, at south, is widest and most brilliant. The second section is more in north and a last in the east. Oddly, the northern section seems separate of the southern one by a dark line. This so-called dark band is seen with no efforts. The southern section is particularly interesting to observe. The color of the components of IC 4756 varies white to blue.
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