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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.