Three well observed and well positioned for predicted path, negatives were recorded for this event.

View the updated prediction.

Observers:
  1(M) S Quirk,Mudgee,NSW,AU
  2(M) D Gault,Hawkesbury Heights,NSW,AU
  3(M) H Pavlov,Marsfield, NSW,AU
  4(P) Predicted 9 March

    

Discussion:

The circle above is plotted at the expected 169 km diameter of Bertholda. With no chords it is not possible to determine whether the path was north or south of the observers.
It would appear that the path lay outside the 1 sigma zone.

Observational Data:

Observation details for MP (420) Bertholda
By Star              UCA 2U26120238
On 2009-04-16  at 15:35:39.0

_______________________________

Observer   Steve Quirk
Location   Mudgee
Longitude  +149:39:45.6
Latitude   -32:27:21.3
Altitude   508 m
Datum
Telescope Newtonian
Aperture   32 cm
Seeing     Slight flickering Clear
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: no drop seen in LiMovie

_______________________________

Observer   Dave Gault
Location   Hawkesbury Heights
Longitude  +150:38:28.
Latitude   -33:39:52.
Altitude   286 m
Datum      WGS84
Telescope Newtonian
Aperture   25 cm
Seeing     Steady Clear
Timing     GPS - time inserted Visual, PE applied

Missed

Comments:

_______________________________

Observer   Hristo Pavlov
Location   Marsfield
Longitude  +151:06:16.8
Latitude   -33:46:11.5
Altitude   100 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Steady Clear
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: