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OCCULTATION OF UCAC2_42902792 BY 925 Alphonsina
2013 January 31

A 4.6 second occultation was recorded by Chris Chad, using video OSD technique.

[xx] clearly observed misses were recorded for this event.

View the updated prediction.

  1    C Chad,Gunnedah, NSW,AU
  2(P) Prediction, 24 January


Alphonsina occultation - 2013 January 31


The circle above is plotted at the expected 80 km diameter of Alphonsina. With only one chord it is not possible to determine whether Chris was north or south of the central line of the event, so the circle has been plotted on the predicted path.

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

Alphonsina occultation - 2013 January 31

Observational Data:

Observation details for MP ( 925 ) Alphonsina
By Star              UCAC2 42902792
On 2013-01-31  at 10:25:20.0


Observer   Chris Chad
Location   Gunnedah, NSW,AU
Longitude  +150:15
Latitude   -30:59
Altitude   315 m
Datum      WGS84
Telescope Newtonian
Aperture   25 cm
Seeing     Slight flickering Clear
Camera Type  Samsung SCB-2000             NTSC/EIA
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  10:25:37.46
Reappearance   10:25:42.07
Comments: I attempted to deploy a second station but ran out of time.


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