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(IAAC) Object: M10 - Instrument: 7x50 binos



Observer: Lew Gramer
Your skills: Intermediate
Date and UT of Observation: 1997-2-10/11, 09:07 UT
Location: Medford, MA, USA (42N)
Site classification: urban
Limiting magnitude: 5.2 (zenith) 4.8 (near object)
Seeing: 3 - medium
Moon up: no
Instrument: 50mm binos
Magnification: 7x
Filters used: None
Object: M10
Category: Globular cluster
Constellation: Oph
Data: mag 6.6  size 15'
RA/Dec: 16h57m  -04o06'
Description:
This globular was an easy 1 to 2 field-of-view binocular
sweep SE of its sibling M12 (see tonight's observation of
M12). Surprisingly unlike M12, M10 needed averted vision
consistently to be seen, appearing much fainter than M12.
But also unlike M12, M10 showed an iota of detail, clearly
brightening toward the middle, with a suggestion of a core.