(IAAC) Obj: M13 - Inst: 3.5" (9cm) ecuatorial refractor

[anonymous at sedna.atmob.org]

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Observation Poster: Tudorica Alexandru <tudorica_a at yahoo.com>

Observer: Tudorica Alexandru
Your skills: Intermediate (some years)
Date/time of observation: 15.06.2004 (21:45 - 21:57) UT
Location of site: Ghirdoveni, Romania (Lat +45, Elev 260 m )
Site classification: Rural
Sky darkness: +6.8 <Limiting magnitude>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 3.5" (9cm) ecuatorial refractor
Magnification: 38x, 76x, 110x
Filter(s): none
Object(s): M13
Category: Globular cluster.
Class: 
Constellation: Her
Data: mag 5.8  size 20'
Position: RA 16:41  DEC +36:28
Description:
Well resolved globular cluster more condensed than M5, brighter and 
smaller, at 40x it is partly resolved, two stars of 7th mag are seen close 
to it, and the galaxy NGC 6207. It looks symmetrical at this power. At 
76x the unresolved cluster looks like it is seen through a blanket of 
stars, creating a 3D effect. At 110x M13 becomes very impressive, some 
arms are developing in all the directions, but mostly in to the west 
side of it. These arms make M13 to look like a sfecla (or a crab, or a 
pineapple). Between M13 and M5, M13 it is more impressive at low power,
but at high power M5 rules. 

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