Station Map for the Occultation by (511) Davida at Tuesday, 2011 April 12 (~ 01:13 UT)
Magnitude of target star 2UCAC 25860399: 12.4 mag
UCAC instrumental „pseudo-R“ fit-model magnitude: 12.4 mag (data from UCAC3)
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 12.6 mag (the magnitude of the asteroid).
The max duration is expected to be 41.4 sec with a max drop of 0.9 mag.
The event will take place at an altitude of 18 deg and at azimuth 136 deg. The sun will be at an altitude of -27 deg. (At predicted centre line for longitude E 20 deg)
There is a 1 sigma uncertainty interval of ± 0.24 path widths.
The probabilities to see a positive event:
Centre line: ~ 96 %
Path limits: ~ 50 %
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:
Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
Map and Coordinates at the web page of E.A.O.N. :
Good luck with your observation!