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



Steve Coe wrote:
> ----
>
> 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.
> Class:
> Constellation: Vul
> Data: mag   size
> Position: RA :  DEC :
> Description:
> 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.
> --
> Optional related URLs:
> ** This observing log automatically submitted via the Web from:
>   http://www.tiac.net/users/lewkaren/netastrocatalog/enter-log.html
FYI, it was reported earlier this year that Collinder 399 is not a true
open cluster.
Dave Mitsky
ASH, DVAA

References: