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(IAAC) OBJECT: Omega Centauri INST: 80mm APO f/6 fl=480mm
Observer: Todd Gross
Your skill: Intermediate
Date and UT of observation: 1/1/98 11:00 GMT
Location & latitude: Cancun, Mexico
Site classification: Urban/Suburban
Limiting magnitude (visual): 5.1 zenith (est) 4.0 (est) in vicinity of object
Seeing (1 to 10 - worst-best): 5 (?)
Moon up (phase?): No
Weather: Clear to pt. cloudy
Instrument: 80mm APO refractor f/6 - f/l 480mm
Magnifications: 16x,32x,69x,138x
Filters used: none
Object: Omega Centauri Globular
Constellation: Centaurus
Object data: GC
Size(s): about 35 arc min.
Position: RA 13:27 DEC -47:29
Magnitude: 3.7
Personal Rating (for this aperture): B
This HUGE globular cluster is almost comically big. It is easily swept
up by just fishing around in approximately the right spot in 8x32
binoculars. Even in poor conditions, with limiting magnitude around 4,
I was able to make it out naked eye with averted vision.
In the 80mm scope, it is roughly the size of the full moon, and a
perfectly symetrical, bright cotton ball, which is partially resolved
at 16x, and esp. 32, 48, and 69x. About 4 foreground stars are
particularly bright near the edges, however, the cluster itself only
breaks up a little, in these conditions and with this aperture, not
breaking into diamond - like points throughout like I can get M13 to
do in perfect conditions near the zenith at home. Nevertheless,
impressive, and best with averted vision.
Thanks!
- Todd
___________________________
Boston Meteorologist Todd Gross
toddg@weatherman.com
http://www.weatherman.com
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