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(IAAC) OBS M4 4.1" f/4.5 (Lew Gramer, latitude 42o)



Observer: Lew Gramer
Your skills: Intermediate
Date and UT of observation: May 17 03:00UT
Location: Sheepsfold, MA, USA (42.4oN, 71.1oW)
Site classification: suburban
Limiting magnitude (visual): 4.2 (S sky washed out!)
Seeing (from 1 to 5): 4
moon up/phase: down
Instrument: 4.1" f/4.5 Edmund AstroScan 2001
Magnification: 16x, 26x
Filters used: none
Object: M4
Category: Globular cluster
Constellation: Sco
Object diameter: ?
RA/DE: 16:22 -26o27
Description: Object difficult to find at first, even
using Antares and surrounding stars for reference.
Once found, it showed clear central concentration,
focused in inner 30% of total diameter, with some
additional thinner concentration out to 70% of the
total diameter. No stars resolved.
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Karen Simmons & Lew Gramer dedalus@alum.mit.edu http://www.tiac.net/users/lewkaren
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