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OCCULTATION OF UCAC2 31860955 BY 218 Bianca
2008 December 28


A 9.3 second occultation was recorded by Brian Loader, using Video- OSD technique.

View the local prediction.

Observers:
  1    B Loader,Darfield, NZ
  2(P) Predcition - Occult special

    

Bianca occultation - 2008 December 28

Discussion:

The circle above is plotted at the expected 60 km diameter of Bianca. With only one chord it is not possible to determine whether Brian was north or south of the central line of the event.

Observational Data:

Observation details for MP (218) Bianca
By Star              UCAC2 31860955
On 2008-12-28  at 15:37:10.0
_______________________________

Observer   Brian Loader
Location   Darfield 
Longitude  +172:06:24.4
Latitude   -43:28:52.9
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  15:37:07.20
Reappearance   15:37:16.50
Comments: Watec camera at 8 fold integration, ie just over 3 unique images per 
second 0.5 Drop in magnitude sharp. The rise less certain.   So a slight doubt
remains, but with viewing the video as well as  running it past Limovie,
I feel certain an event occurred.
I was 222 km north of the predicted centre line and 12 km outside the
1-sigma zone.  Probability of an event 8.4%.

    

Return to 2008 occultation results



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