(IAAC) Obj: NGC7789 - Inst: 30cm, f:10, SCT, LX200

Observation Poster: Jim Anderson <madmoon@bellsouth.net>
Observer: Jim Anderson
Your skills: Intermediate (some years)
Date/time of observation: 10052000-00:40EST
Location of site: Bigwoods, NC (Lat 35:46, Elev 250')
Site classification: Exurban
Sky darkness: 5/10 <1-10 Scale (10 best)>
Seeing: 5/10 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 30cm, f:10, SCT, LX200
Magnification: 117X
Filter(s): None
Object(s): NGC7789
Category: Open cluster.
Class: II 1 r
Constellation: Cas
Data: mag 6.7v  size 16.0'
Position: RA 23:57.0  DEC +56:43
117X - A rich cluster with 10 brighter stars of 8.49 to 11.18 mag. Estimated,
100-150 stars are resolvable in the 30CM SCT under good skies. (15 mag-
threshold) Per SkyMap Pro; v 6 and ARP,(1962) there are 1000 stars 11-18mag in
this cluster. NGC7789 resimbles a sparse globular cluster with irregular
boundry. It gradually brightens toward the center, but without a real nucleus.
The brighter 75-100 stars stand out well against the fainter stars.
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