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A 16.15 second occultation was recorded by Stephen Russell, using video technique.
View the updated prediction.
Observers: 1 S Russell,Colinton, NSW, AU 2(M) D Herald,Kambah, ACT, AU 3(M) H Pavlov,Marsfield, NSW, AU 4(P) Prediction 3 Sept
Discussion:
The circle above is plotted at the expected 407 km diameter of Hygiea. With the nearby negative observations by Dave Herald and Hristo Pavlov we can be confident that Stephen was north of the central line of the event and that the updated prediction was very close to the actual path of the asteroid.
The figures below show the Limovie graphs of the occultation as observed by Stephen and Dave
The expected magnitude drop of 0.21 means the signal to noise ratio is low but signal is clear.
Observational Data:
Observation details for MP (10) Hygiea By Star TYC 0596-00777-1 On 2007-10-02 at 13:19:46.0 _______________________________ Observer Stephen Russell Location Colinton, NSW, AU Longitude +149:09:6.6 Latitude -35:51:58.9 Altitude 721 m Datum WGS84 Telelscope Newtonian Apperture 20 cm Seeing Slight flickering Clear Timing GPS - time inserted Video with frame analysis Disappearance 13:19:39.40 Reappearance 13:19:55.55 Comments: Altitude datum = MSL. WGS84 adjustment 11.2m _______________________________ Observer Dave Herald Location Kambah, ACT, AU Longitude +149:03:49. Latitude -35:23:49.3 Altitude 540 m Datum WGS84 Telelscope SCT including Cass and Mak Apperture 35 cm Seeing Steady Clear Timing GPS - other linking Video with frame analysis Missed Comments: _______________________________ Observer Hristo Pavlov Location Marsfield, NSW, AU Longitude +151:06:10.9 Latitude -33:46:13.9 Altitude 108 m Datum WGS84 Telelscope SCT including Cass and Mak Apperture 20 cm Seeing Steady Clear Timing GPS - time inserted Video with frame analysis Missed Comments: