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(IAAC) Obj: M92 - Inst: 8 X 42 Opticron Imagic Binoculars



Observer: Kim Gowney
Your skill: 5 yrs
Date and UT of observation: 09/06/00 23:00
Location & latitude: SW Wales UK 51 deg N
Site classification: Rural
Limiting magnitude (visual): 4.7
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): First quarter
Instrument: 8 X 42 Opticron Imagic Binoculars
Magnification: 8x
Filters used: None
Object: M92
Category: Globular cluster.
Constellation: Hercules
Object data: Mag 6.5 12.1m*; Size 11.2'; Type IV
RA/DE: 171707 +4308.2
Description:
The cluster appeared as a bright fuzzy star, using the Skymap pro6
program I printed out a chart and made comparisons of brightness with
three nearby stars TYC 3098-870-1 mag 6.89, TYC 3085-346-1 mag 7.23,
TYC 3081-980-1 mag 6.75, the estimates were made easy by defocusing
the imgage until the stars diameter was close to that of the clusters,
the cluster was obviously brighter than the 7.23, just brighter than
the 6.89 and only very slightly brighter than the 6.75 which ties in
nicely with the given mag of 6.5 for the cluster.
The limiting mag for the bino's was 8.7.
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