(IAAC) M39 4.25" refl. f/7.9

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Observer: Bernhard Rems
Your skills: Intermediate
Date and UT of Observation: 1989-08-07, 21:00 UT
Location: Vienna, Austria (48N)
Site classification: suburban
Limiting magnitude: <5.5
Seeing: 3 - fair
Moon up: no
Instrument: Reflector 4.25" f/7.9
Magnification: 36x, 220x
Filters used: none
Object: M39
Category: Open cluster
Constellation: Cyg
Data: 30'
RA/DE: 21h32m   48o20'
Description: This cluster is a little bit too big for 36x, but very nice.
Some brighter stars visible "in front of" some fainter ones. Found a faint
double within the cluster with 6mm ortho, another one (brighter and wider)
just in the center of M39. Interesting object for suburban conditions -
I think it won't be half as nice from the country (too many background stars
in Cygnus).
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