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Two positive observations were recorded by Jonathan Bradshaw and David Breadsell.
View the updated prediction.
Observers: 1(C) P Anderson, Taylor Range Obs,Qld, AU 2 D Breadsell,Toowoomba, QLD, AU 3 J Bradshaw,Samford, QLD, Au 4(P) Predicted 26 Apr
Discussion:
The elipse above is plotted at close to the same area as the expected 171 km diameter of Winchester. The two chords suggest that the center line was a little south of all three observers. From the plot it looks as if Peter may have seen the event but as times are very uncertain they are not used in the analysis.
The figure below shows the light curve observed by Jonathan as analysed by Limovie software. Despite poor conditions he was able to extract good data.
Observational Data:
Observation details for MP (747) Winchester By Star TYC 0368-01463-1 On 2008-05-27 at 11:45:12.0 _______________________________ Observer Peter Anderson Location Taylor Range Observatory,Qld, AU Longitude +152:56:1.5 Latitude -27:27:47.6 Altitude 176 m Datum WGS84 Telelscope Newtonian Apperture 41 cm Seeing Steady Thin cloud < 2 Timing Radio broadcast - calibrated Visual, PE applied Missed Comments: The target star was located shortly after 11hrs. Conditions were such that I used low magnification (X98) so that brighter stars remained in the field for orientation purposes. When it was briefly clear, the star was easily bright enough to monitor. However during the monitoring period the target star was not visible except for the key period between 11hrs 47min and 11hrs 48min when it flickered in and out of visibility. Perhaps there was an event around 11hrs 47min 45sec because it was not seen for about 15 seconds, but it could just have easily been cloud. Most unsatisfactory! [From the plot it looks as if Peter may have seen the event but as times are very uncertain they are not used in the analysis - jt] _______________________________ Observer Jonathan Bradshaw Location Samford, Queensland, Australia Longitude +152:52:22.7 Latitude -27:21:22.8 Altitude 95 m Datum WGS84 Telelscope Dobsonian Apperture 50 cm Seeing Steady Thick cloud > 2 Timing GPS - time inserted Video with frame analysis Disappearance 11:47:44.50 Reappearance 11:47:53.50 Comments: Shocking conditions and covered by thick high cloud. I cranked the GSTAR-EX camera up to 12x (6 frame) integration, and managed to record the event. I have subtracted 120ms which is my estimate of the camera lag, but the margin of error may be high. _______________________________ Observer David B Breadsell Location Toowoomba Longitude +151:55:37.4 Latitude -27:35:58.4 Altitude 730 m Datum WGS84 Telelscope Dobsonian Apperture 25 cm Seeing Steady Clear Timing Stopwatch Visual, PE applied Disappearance 11:47:49.60 Reappearance 11:48:00.00 Comments: Perfect conditions. Best possible visual observation.