A 3.5 second occultation was recorded by Chris Chad, using video OSD technique.

View the updated prediction.

Observers:
  1    C Chad,Gunnedah, NSW
  2(P) Prediction, 31 March


        

Discussion:

The circle above is plotted at the expected 79 km diameter of Silesia. With only one chord it is not possible to determine whether Chris was north or south of the central line of the event.

The figure below shows the Limovie/Tangra light curve of the occultation.

Observational Data:

Observation details for MP ( 257 ) Silesia
By Star              TYC 6793-01654-1
On 2013-05-17  at 15:45:59.0

_______________________________

Observer   Chris Chad
Location   Gunnedah, NSW
Longitude  +150:15
Latitude   -30:59
Altitude   315 m
Datum      WGS84
Telescope Newtonian
Aperture   25 cm
Seeing     Strong flickering Clear
Camera Type  Samsung SCB-2000             NTSC/EIA
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  15:46:02.95
Reappearance   15:46:06.42
Comments: Unattended drift through video.  Very clear event.
Single frame delay (0.034s subtracted from times)
Report prepopulated by IOTA Reporting Add-in for OW ver.1.7