A 17.7 second occultation was recorded by John Broughton, using video OSD technique.

One clearly observed miss was recorded for this event.

View the updated prediction.

Observers:
    1    J Broughton,Lake Clarendon, QLD, AU
  2(M) S Kerr,Rockhampton,QLD,AU
  3(M) J Bradshaw,Samford,QLD,AU
  4(P) Prediction, 16 April

    

Discussion:

The circle above is plotted at the expected 168 km diameter of Prokne. With only one chord it is not normally possible to determine whether John was east or west of the central line of the event. However with Jonathan Bradshaw's constraining miss we can be sure that John was in fact East of the mid point.

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

Observational Data:

Observation details for MP (194) Prokne
By Star              TYC 0454-00875-1
On 2011-05-13  at 17:30:17.0

_______________________________

Observer   John Broughton
Location   Lake Clarendon, QLD, AU
Longitude  +152:21
Latitude   -27:30
Altitude   105 m
Datum      WGS84
Telescope Newtonian
Aperture   31 cm
Seeing     Slight flickering Clear
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis
Disappearance  17:30:02.29
Reappearance   17:30:20.05
Comments: WAT120N+ x1 -0.05 applied

_______________________________

Observer   S. Kerr
Location   Rockhampton,QLD,AU
Longitude  +150:30
Latitude   -23:16
Altitude   50 m
Datum      Other
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: 40ms exposures
Report prepopulated by IOTA Reporting Add-in for OW ver.1.4
_______________________________

Observer   Jonathan Bradshaw
Location   Samford,QLD,AU
Longitude  +152:50
Latitude   -27:22
Altitude   80 m
Datum      WGS84
Telescope Newtonian
Aperture   36 cm
Seeing     Slight flickering Clear
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: A Shackleton adventure - made it to the path, only to be under deep cloud.
Returned home to make a constraining observation under clear sky
Report prepopulated by IOTA Reporting Add-in for OW ver.1.4