(IAAC) Obj: Collinder 399 - Inst: 6" f/6 Dobsonian RFT


Observer: Steve Coe
Your skills: Advanced (many years)
Date/time of observation: 
Location of site: White Tank Mts. near Phoenix (Lat +33, Elev 1600 ft)
Site classification: Exurban
Sky darkness: 6 <1-10 Scale (10 best)>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument:  6"  f/6 Dobsonian RFT
Magnification: 25X, 40X, 60X, 100X
Filter(s): none
Object(s): Collinder 399
Category: Open cluster.
Constellation: Vul
Data: mag   size 
Position: RA :  DEC :
This huge cluster just fits in the 38mm Erfle using the RFT 6" scope.
It has always appeared like its namesake--The Coathanger.  A straight
line of stars has a hook of stars "above" it.  It is very bright,
extremely large, not compressed and composed of stars both bright
and faint.  There are several faint pairs involved.  All in all,
I counted 38 stars involved in this naked eye cluster, it appears
as a pretty bright spot in the dark Rift in the Milky Way.  A lovely
site in the 10X50 binocs, 15 stars resolved and the Coathanger
shape is easy to see with two eyes.  It floats in front of the
obviously dark region of the Summer Milky Way.
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