Station Maps for the Occultation by (1023) Thomana at Thursday, 2009 August 20 (~ 00:10 UT)

WEST and EAST

Magnitude of target star 2UCAC 31962847: 12.8 mag

The max duration is expected to be 5.0 sec with a max drop of  1.5 mag.
The event will take place at an altitude of 44 deg and at azimuth 190 deg. The sun will be at an altitude of -31 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.81 path widths.
The probabilities to see a positive event:

Centre line: ~  46 %
Path limits: ~  39 %
1 sigma lines:  ~ 15 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.

Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_08/0820_1023_21779.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090820_21779_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s prediction):
http://astrosurf.com/eaon/Occultations%20August.htm

Good luck with your observation!

Oliver Klös

IOTA-ES