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(IAAC) Object: M12 - Instrument: Newt 12.5" f/4.8



Observer: Lew Gramer
Your skills: Intermediate
Date and UT of Observation: 1996-06-16, 04:00 UT
Location: Bath, ME, USA (44N)
Site classification: rural
Limiting magnitude: 7.1
Seeing: 2 - medium poor
Moon up: no
Instrument: Reflector 12.5" f/4.8
Magnification: 55x, 85x, 110x, 170x
Filters used: none
Object: M12
Category: Globular cluster
Constellation: Oph
Data: mag 6.6  size 14.5'
RA/DE: 16h47m  -01o57m
Description: A very pretty object, and a nice chance to
compare and contrast with its near globular neighbor M10.
At 85x and 110x, it exhibits a very tight center, along
with a more diffuse concentration that is visible over 80%
of its surface. There is also a concentration or secondary
core of stars to the SW, visible at 55x. Using 170x, six
stars were resolved in the granular mass of M12.