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!