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OCCULTATION OF UCAC4 529 03189 BY 107 Camilla
2013 May 07


A 6.9 second occultation was recorded by Gordon Hudson, using Video OSD technique.

An obseravtion by Brian was initially deemed a possible positive event but when it did not fit with Gordon's data nor the ISAM model we decided to treat it as a miss. 6 other observers were registered in OW but were clouded out or had other problems that prevented observation.

View the TT14 prediction.

Observers:
  1    B Loader,Darfield
  2    G Hudson,Porirua, New Zealand
  3(P) Prediction, Camilla TT14 1 May
  4(P) Prediction for Camilla(S/2001) S/2001 is a Satellite of Camilla - prediction made with Occult4

Others registered but no result:

Chris Chad AU - late starting
John Drummond, NZ Clouded out
Dave Gault AU - late starting
John Talbot - On wrong field
Peter Graham NZ -
Bill Allen NZ -

        

Camilla occultation - 2013 May 07

Discussion:

The ellipse above is plotted at the best fit axis ratio as determined light curve data. It also shows the predcited path of the satellite with a small event at lower right. While this is close to Brian's path the position of his "possible" is a long way from the predcited. After discussions we decided to treat Brian's data as a miss

Camilla occultation - 2013 May 07

This is the "Most probable" solution to the data. The ellipse above is plotted at the best fit axis ratio as determined by matching the ISAM model. With only one chord it is not possible to determine whether Gordon was north or south of the central line of the event. However if we treat Brian's line as a miss then it constrains the psth to the north and close to the prediction The ISAM 3D model has been overlaid and the ellipse adjusted to be a good fit - Note this is the reverse of what we normally do and does not imply an actual shape.

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

Camilla occultation - 2013 May 07

The figure below shows the Brian's light curve of the "possible" occultation.

Camilla occultation - 2013 May 07
It is a pity that more of us did not manage to observe as this had potential to get 5 or 6 chords.

Observational Data:

Observation details for MP ( 107 ) Camilla
By Star              UCAC4 529-031891
On 2013-05-07  at 07:52:39.0

_______________________________

Observer   B. Loader
Location   Darfield
Longitude  +172:06
Latitude   -43:28
Altitude   210 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Strong flickering Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay 0.35
Timing     GPS - time inserted Video with frame analysis
Disappearance  07:52:28.44
Reappearance   07:52:30.32
Comments: A *possible* event only.  Needs confirmation by other observations.
Report prepopulated by IOTA Reporting Add-in for OW ver.1.7

_______________________________

Observer   G Hudson
Location   Porirua, New Zealand
Longitude  +174:50
Latitude   -41:06
Altitude   52 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Steady Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay 0.11
Timing     GPS - time inserted Video with frame analysis
Disappearance  07:52:43.04
Reappearance   07:52:50.01
Comments: Severe problems with time insertion -
Disapears randomly


        

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