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Two observations occultation was recorded for this event.
View the updated prediction.
Observers: 1 P Anderson,THE GAP,Brisbane,QLD,AU 2 J Bradshaw,Samford Valley,QLD,AU 3(P) Prediction, Jun 09
Discussion:
The circle above is plotted at the expected 141 km diameter of Bononia. With two of chords we can be confident of the path of Bononia and that it was north of the predicted line.
The figure below shows the Limovie/Tangra light curve of the occultation.
Observational Data:
Observation details for MP (361) Bononia By Star UCA 2U28554539 On 2011-08-01 at 11:51:40.0 _______________________________ Observer Peter Anderson Location THE GAP,Brisbane,QLD,AU Longitude +152:55 Latitude -27:27 Altitude 170 m Datum WGS84 Telescope Newtonian Aperture 41 cm Seeing Slight flickering Clear Camera Type Camera Delay Timing Tape Recorder + time signal Visual, PE applied Disappearance 11:51:40.10 Reappearance 11:51:44.40 Comments: Low altitude and star faint but just constantly held. Because faint, some delay with D, but R was quickly picked up. Tape recording backup reveals 'gone' around 40.8 so stopwatch trigger must have followed. 'Back' on tape is around 44.7 so coincident with stopwatch. Overall quite satisfactory for a faint star at low altitude. Conditions clear and still [an adjustment of -0.9 ecs has been made to above figures to align with Jonathans video data- jt] _______________________________ Observer Jonathan Bradshaw Location Samford Valley,QLD,AU Longitude +152:50 Latitude -27:22 Altitude 80 m Datum WGS84 Telescope Newtonian Aperture 36 cm Seeing Steady Clear Camera Type G-Star PAL/CCIR Camera Delay 0.26 Timing GPS - time inserted Video with frame analysis Disappearance 11:51:39.47 Reappearance 11:51:43.25 Comments: Amazed I could even see this one, plucked from 9 degrees off the horizon. No sign of duplicity.