(IAAC) OBJECTS: M80 M4 INST: 7" fl 950mm LM=4.0

Observer:  Todd Gross
Your skill:  Intermediate - Many years
Date and UT of observation: 4/13/99
Location & latitude: 22 mi. West of Boston, Ma. 42.3N
Site classification: Suburban
Limiting magnitude (visual): cloudy zenith, approx. 4 near object
Moon up (phase?): No
Weather: Pt. cloudy
Instrument: 7"  fl l950mm /4.2 Newt 
Magnifications: 136X
Filters used: 
Object: M80, M4
Constellation: Sco
Object data: Globular clusters
Size(s):  9', 26' 
Position: 16:17/-22:59 M80, 16:24, -26:32 M4
Magnitude: 7.2, 5.9 (m4)
Personal "rating" (at this aperture, and sky condition): B-(m80) B+/A-(m4)
M80 appeared as a small, compact fairly bright globular cluster on the 
verge of resolving at this aperture and sky condition. Very similar to M13
in an 80mm scope.
M4 was beautiful. Highly resolved, especially the easy outer members. However
despite being a large, loose globular, the core was rich, and a bar of
stars were resolved in the core in particular, extending in a N-S direction.
Boston Meteorologist Todd Gross
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