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M13 (Hercules Cluster) (Globular Cluster, in Hercules)
Observer: James Moyer (e-mail: dr.@who.net)
Instrument: 12.5-inch equatorial reflector Location: Buckingham, PA, USA
Light pollution: moderate Transparency: excellent Seeing: good
Time: Wed May 21 03:00:00 1997 UT Obs. no.: 139
This observation was made two days before full moon. At 55x M13 appeared very bright and large with many stars resolved, esp. towards the outskirts of the cluster but also continuing towards the center. The resolved stars gave the distinct impression of being superimposed over (in front of) the unresolved globular's central region. At 205x M13 filled the field of a 7mm Nagler eyepiece with many dozens of stars resolved, tiny pinpoints of light scattered across the entire field. The resolved stars were easily seen with direct vision at both magnifications. This is my very first deep sky observation made with a new NGT-12.5 after completing collimation and star testing.
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Questions? Problems? E-mail jbc@west.net
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