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A 6.4 second occultation was recorded by Albert Brakel, using visual observation technique.
View the updated prediction.
Observers: 1 A Brakel, Downer, ACT,AU 2 Prediction
Discussion:
The circle above is plotted at the expected 51 km diameter of Colchis. With only one chord it is not possible to determine whether Albert was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the shorter than expected chord of about 45 km would suggest that the chord might lie close to the central portion of the asteroid. The predicted line is about 105 km south of Albert's position, about 2 sigma from prediction showing that it is worth observing even when you are quite a way from predicted path.
Observational Data:
Observation details for MP (1135) Colchis By Star TYC 6362-00397-1 On 2007-09-10 at 13:03:25.0 _______________________________ Observer Albert Brakel Location Downer, ACT (home) Longitude +149:08:18. Latitude -35:14:27. Altitude 575 m Datum WGS84 Telelscope SCT including Cass and Mak Apperture 20 cm Seeing Steady Clear Timing Tape Recorder + time signal Visual, PE applied Disappearance 13:03:17.50 Reappearance 13:03:23.90 Comments: Gamma Cap had to be kept outside the FOV because its glare interfered. Timing using beeper box manually synchronized to dimension4