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(IAAC) Obj: M39 - Inst: Newt 4.2" f/4.25



Observer: Lew Gramer
Your skills: Intermediate
Date and UT of Observation: 1996-11-12, 04:30 UT
Location: Medford, MA, USA (42N)
Site classification: urban
Limiting magnitude: 5.4
Seeing: 1 - excellent
Moon up: no
Instrument: Newt Reflector 4.2" f/4.25 (AstroScan)
Magnification: 20x, 65x
Filters used: None
Object: M39
Category: Open Cluster
Constellation: Cyg
Data: mag 4.6  size 32' (catalog) >40' (observed)
RA/DE: 21h32m  +48o26m
Description:
This rich field stands out well from the background
within a narrow area about 2o around the cluster, but
is not much richer than the stars within a wider (5o+)
field. At 65x, 50 associated stars were counted covering
more than 40' incl. outliers, down to mag 11. No stars
were sufficiently bright to show any color, though low
altitude of object (30-40o) may have interfered.
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Karen Simmons & Lew Gramer dedalus@alum.mit.edu http://www.tiac.net/users/lewkaren
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