Two Chords were recorded using video OSD technique.

View the updated prediction.

Observers:
  1    J Bradshaw,Samford Valley, Qld, AU
  2    J Broughton,Reedy Creek, QLD, AU
  3(P) Prediction, TT14   Sep 29

        

Discussion:

The ellipse above is plotted at the best fit axis ratio as determined by Occult. This is sliightly flatter than suggested by light curve data. With two chords we can be confident of the path of PHthia and that it was north of the predicted line.

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

Observational Data:

Observation details for MP ( 189 ) Phthia
By Star              UCAC4 417-147092
On 2012-10-17  at 12:36:00.0

_______________________________

Observer   Jonathan Bradshaw
Location   Samford Valley, Qld, Australia
Longitude  +152:50
Latitude   -27:22
Altitude   80 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   36 cm
Seeing     Steady Clear
Camera Type  G-Star         PAL/CCIR
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  12:36:19.91
Reappearance   12:36:21.83
Comments: Not sure this will tie in with John, but it is a known variable…

_______________________________

Observer   John Broughton
Location   Reedy Creek, QLD, AU
Longitude  +153:23
Latitude   -28:06
Altitude   66 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.19
Timing     GPS - time inserted Video with frame analysis
Disappearance  12:36:47.82
Reappearance   12:36:59.34
Comments: