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OCCULTATION OF UCAC2 28554539 BY 361 Bononia
2011 August 01


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

    

Bononia occultation - 2011 August 01

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.

Bononia occultation - 2011 August 01

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.


    

Return to 2011 occultation results



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