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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
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%.