(IAAC) Obj: NGC 2355 - Inst: 13" f/5.6 Newtonian on Bigfoot German EQ

Observer: Steve Coe
Your skills: Advanced (many years)
Date/time of observation: 12 Feb 99
Location of site: Salome, Arizona USA (Lat +34, Elev 3000 ft)
Site classification: Rural
Sky darkness: 8 <1-10 Scale (10 best)>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument:  13"  f/5.6 Newtonian on Bigfoot German EQ 
Magnification: 100X, 220X
Filter(s): none
Object(s): NGC 2355
Category: Open cluster.
Constellation: GEM
Data: mag 9.7  size 9.0'
Position: RA 07:17  DEC +13:47
NGC 2355 is seen in the 11X80 finder as a tiny fuzzball that
is next to a 7th magnitude star.  At 100X in the 13" f/5.6 
this cluster is pretty bright, pretty small, pretty rich and 
considerably compressed.  I counted 26 stars all on top of 
a fuzzy background that is easy with averted vision.  
Powering up to 150X shows 32 stars in a cluster that fills 
50% of the field of view.  What was a double star at lower
power now shows itself to be a triple with a delicate 13th
magnitude companion, the main pair is a nice yellow and blue.
All the stars within the cluster are resolved.
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