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OCCULTATION OF UCAC2 9128919 BY 31 Euphrosyne
312009 June 26


An 11.1 second occultation was recorded by Brian Loader, using Video OSD technique.

View the updated prediction.

Observers:
  1    B Loader,Darfield, NZ
  2(P) Prediction

    

Euphrosyne occultation - 312009 June 26

Discussion:

The circle above is plotted at the expected 255 km diameter of Euphrosyne. With only one chord it is not possible to determine whether Brian was north or south of the central line of the event.
The light curve below has an interesting spike during the event. Careful review sugests that this is most likely a noise spike that is consistent with the unocculted trace from both the target and reference stars.

The figures below shows the Limovie light curve of the occultation.

Euphrosyne occultation - 312009 June 26

Euphrosyne occultation - 312009 June 26

Observational Data:

Observation details for MP (31) Euphrosyne
By Star              UCAC2 9128919
On 2009-06-26  at 07:08:13.0

_______________________________

Observer   B. Loader
Location   Darfield
Longitude  +172:06:24.
Latitude   -43:28:53.
Altitude   210 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Slight flickering Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  07:08:11.40
Reappearance   07:08:22.50
Comments: A possible mid reappearance lasting 0.7 seconds from
07:08:17.4 to 07:08:18.1
Watec 120N camera used at 8x integration.



    

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