Station Map for the Occultation by (1080) Orchis at Tuesday, 2011 April 19 (~ 19:26 UT)

 UPDATE (S.Preston), 2011 April 16:

Path shift of ~ 10 km to the North (perpendicular to the path)

V-Magnitude of target star TYC 1855-01011-1: 9.8 mag
Johnson B-V Colour Index: + 0.5
UCAC instrumental „pseudo-R“ fit-model magnitude: 9.7 mag (data from UCAC3)

The max duration is expected to be 0.6 sec with a max drop of 6.8 mag.
The event will take place at an altitude of 28 deg and at azimuth 278 deg. The sun will be at an altitude of -14 deg. (At predicted centre line for longitude E20 deg)

There is a 1 sigma uncertainty interval of  ± 1.69 path widths.
The probabilities to see a positive event:

Centre line: ~  23 %
Path limits: ~  22 %
1 sigma lines:  ~ 10 %
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:

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

Good luck with your observation!

Oliver Klös


(1080) Orchis, 2011 April 19; Station Map

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