The occultation of a star by asteroid Hygiea (10) - 05 September 2014

There is my second positive occultation this year.

The begin of this occultation was during dawn. The sky was quite bright. Due to this fact I had to use infrared filter 742nm for blocking light blue morning light from dawn. Next problem was exposure time. Dawn was adding more and more light and occulted star began to vanish. Even during recording I had to adjust exposure time. It was a really difficult observation.

The map with predicted path:

Light curve from video record.
The begin of occultation was at 03:41:12.704 UTC +/- 0.1s; end at 03:41:29.370 UTC +/- 0.05s. Total duration is 16,67s +/-0,15s.