(IAAC) OBS M13 12.5" f/4.8 (Lew Gramer, latitude 43o)

Observer: Lew Gramer
Your skills: Intermediate
Date and UT of observation: May 26 04:30UT
Location: Gunstock, NH, USA (43.5oN, 71.3oW)
Site classification: rural
Limiting magnitude (visual): 6.2
Seeing (from 1 to 5): 3
moon up/phase: down
Instrument: 12.5" f/4.8 dob newtonian
Magnification: 55x, 85x
Filters used: none
Object: M13
Category: Globular cluster
Constellation: Hercules
Object diameter: ?
RA/DE: 16:41 +36o30
Description: Magnificent globular! Second only
to Omega Centauri (and 47 Tucanae, although I've
never seen that). Clearly resolved 10 stars, up
to 15 more could have been clear in better seeing.
High concentration, but also wide dispersion even
in low power eyepiece.

Karen Simmons & Lew Gramer dedalus@alum.mit.edu http://www.tiac.net/users/lewkaren