Two chords were recorded by Dave Gault and Hristo Pavlov, using Video OSD technique.

View the updated prediction.

Observers:
  1    D Gault,Linden Observatory,NSW,AU
  2    H Pavlov,St Clair, NSW, Australia
  3(P) Prediction, May 02

    

Discussion:

The circle above is plotted at the best fit to the two chords with about 93km diameter compared to the expected 103 km diameter of Leukothea. With two chords we can be fairly confident of the path of Leukothea and that it was south of the predicted line.

The figure below shows Dave's Tangra light curve of the occultation.

At first it was thought the steps in the D and R may indicate duplicity of the star but as there was no similar step in Hristo's data (below) it has been put down to integration in the camera.

Observational Data:

Observation details for MP (35) Leukothea
By Star              TYC 7332-00231-1
On 2011-06-19  at 08:33:15.0

_______________________________

Observer   Dave Gault
Location   Linden Observatory,NSW,AU
Longitude  +150:29
Latitude   -33:42
Altitude   582 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Steady Clear
Camera Type
Camera Delay
Timing     GPS - time inserted Video with frame analysis
Disappearance  08:33:12.50
Reappearance   08:33:27.74
Comments: With possible step events -
See Light Curve- not supported by Hristo

_______________________________

Observer   Hristo Pavlov
Location   St Clair, NSW, Australia
Longitude  +150:46
Latitude   -33:48
Altitude   68 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   35 cm
Seeing     Slight flickering Clear
Camera Type  WAT902H        PAL/CCIR
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  08:33:09.43
Reappearance   08:33:24.39
Comments: http://www.hristopavlov.net/Observations/Positives/2011-06-19%20Leukothea/Event.html
Report prepopulated by IOTA Reporting Add-in for OW ver.1.5