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Two positive occultations were recorded by Dave Gault, using video and GPS timing technique. One site was unattended. Steve Russell at a nearby site recorded a miss.
View the updated prediction.
Observers: 1 D Gault,Hawkesbury Heights,NSW,AU (Unattended) 2 D Gault,Tennyson,NSW,AU 3(M) S Russell,near Rouse Hill, NSW,AU 4(P) Predicted 14 Aug
Discussion:
The ellipse above is plotted at the best fit approximation based on the constraint that the area of the ellipse should be similar to the predicted area of Senta with a 38km diameter circle. There are several possible solutions but the one chosen seems a reasonable approximation that fits Dave's two observations. As is so often the case, having more observations would help constrain the possibilities.
Video on Youtube of Dave's drift observation at site 1.
Observational Data:
Observation details for MP (550) Senta By Star TYC 6212-00414-1 On 2007-09-11 at 10:58:50.0 _______________________________ Observer Dave Gault Location Hawkesbury Heights Longitude +150:38:27.8 Latitude -33:39:52. Altitude 286 m Datum WGS84 Telelscope Newtonian Apperture 25 cm Seeing Steady Clear Timing GPS - time inserted Video with frame analysis Disappearance 10:58:48.71 Reappearance 10:58:49.14 Comments: Station A -unattended video _______________________________ Observer Dave Gault Location Tennyson Longitude +150:44:55.2 Latitude -33:32:31.8 Altitude 90 m Datum WGS84 Telelscope SCT including Cass and Mak Apperture 20 cm Seeing Steady Clear Timing GPS - time inserted Video with frame analysis Disappearance 10:58:47.94 Reappearance 10:58:49.62 Comments: Station B -attended video _______________________________ Observer Stephen Russell Location near Rouse Hill, NSW Longitude +150:53:0.4 Latitude -33:38:24.3 Altitude 59 m Datum Other Telelscope Newtonian Apperture 20 cm Seeing Steady Clear Timing GPS - time inserted Video with frame analysis Missed Comments: Altitude datum = MSL. WGS84 adjustment 20.5m