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OCCULTATION OF UCAC2 20252141 BY 426 Hippo
2014 September 27

A 10.3 second occultation was recorded by Ashley Pennell, using Video OSD technique.

No clearly observed misses were recorded for this event. There were 3 other observers registered but they were all clouded out.

View the updated prediction.

  1    A ,Pennell, Dunedin NZ               
  2(P) Prediction,27 August                 


Hippo occultation__ 2014 September  27


The ellipse above is plotted at the maximum axis ratio as determined by lightcurve inversion data. With only one chord it is not possible to determine whether Ashley was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the longer than expected chord of about 160km would suggest that the chord might lie close to the central portion of the asteroid. With no positive chords we cannot say where the actual path was, so the circle has been plotted on the predicted path.

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

Hippo occultation__ 2014 September  27 As Ashley used a very long integration period the time resolution is rather long and hence the long error bars in the Plot above. This makes the Ellipse size quite uncertain as well. It might have been better to use one step faster integration to improve the time resolution at the expense of fainter stars.

Observational Data:

Observation details for MP ( 426 ) Hippo
By Star              UCAC2 20252141
On 2014-09-27  at 11:40:36.0


Observer   Ash Pennell 
Location   Dunedin NZ
Longitude  +170:29
Latitude   -45:52
Altitude   136 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   35 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay -0.67
Timing     GPS - time inserted Video with frame analysis
Disappearance  11:40:31.30
Reappearance   11:40:41.60

Return to 2014 occultation results

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