**Station Map for the Occultation by (250) Bettina at Saturday, 2009 October 31 (~ 22:13 UT)**

Magnitude of target star 2UCAC 44644296: 12.5 mag

UCAC instrumental „pseudo-R“ fit-model magnitude: 12.6 mag (data from UCAC3)

The max duration is expected to be 11.2 sec with a max drop of 0.7 mag.

The event will take place at an altitude of 45 deg and at azimuth 83 deg. The sun will be at an altitude of -54 deg. (At predicted centre line for longitude E 20 deg 42 min)

There is a 1 sigma uncertainty interval of ± 0.59 path widths.

The probabilities to see a positive event:

Centre line: ~ 60 %

Path limits: ~ 45 %

1 sigma lines: ~ 16 %

2 sigma lines: ~ 2 %

(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_10/1031_250_22667.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):

http://www.poyntsource.com/New/Google/20091031_22667_Sites.txt

Map and Coordinates at the web page of E.A.O.N. :

http://astrosurf.com/eaon/Occultations%20October.htm

Good luck with your observation!

Oliver Klös

IOTA-ES