A 4.04 second occultation was recorded by Jonathan Bradshaw, using video OSD technique.

View the updated prediction.

Observers:
  1    J Bradshaw,Samford, Qld,AU
  2(M) J Broughton,Reedy Creek, QLD, AU
  3(M) J Broughton,Pottsville,NSW,AU
  4(M) D Lowe,Applethorpe,QLD,AU
  5(P) Prediction, 16 Sept


    

Discussion:

The circle above is plotted at 52km diameter which is significantly bigger than the expected 40 km diameter of David Bender. With only one chord it is not possible to determine whether Jonathan was north or south of the central line of the event. However, the much longer than expected chord of about 52 km would suggest that the chord might lie close to the central portion of the asteroid.

The figure below shows the Limovie / Occularc light curve of the occultation.

Observational Data:

Observation details for MP (2725) David Bender
By Star              TYC 5845-00513-1
On 2009-09-30  at 11:40:25.0

_______________________________

Observer   Jonathan Bradshaw
Location   Samford, Qld,AU
Longitude  +152:52:22.7
Latitude   -27:21:22.8
Altitude   95 m
Datum      WGS84
Telescope Dobsonian
Aperture   50 cm
Seeing     Steady Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  11:40:34.17
Reappearance   11:40:38.21
Comments: At last, the drought is over… (and with a very unlikely event too)
I have subtracted 20ms which is my estimate of the camera lag.
http://www.youtube.com/watch?v=oYyzuCMDlL4

_______________________________

Observer   Dennis Lowe
Location   Applethorpe,QLD,AU
Longitude  +151:57:25.3
Latitude   -28:36:51.4
Altitude   880 m
Datum      WGS84
Telescope Refractor
Aperture   10 cm
Seeing     Slight flickering
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Observation station was further north by 3Km
than reported in Occult Watcher.
_______________________________

Observer   J Broughton
Location   Reedy Creek, QLD,Reedy Creek, QLD 4227, Australia
Longitude  +153:23:52.9
Latitude   -28:06:30.4
Altitude   66 m
Datum      WGS84
Telescope Newtonian
Aperture   51 cm
Seeing     Slight flickering Clear
Timing     Sound recorder + time signal Drift scan

Missed

Comments: Unattended drift scan.

_______________________________

Observer   J Broughton
Location   Pottsville, NSW,Reedy Creek, QLD 4227, Australia
Longitude  +153:34:5.2
Latitude   -28:23:20.8
Altitude   4 m
Datum      WGS84
Telescope SCT
Aperture   25 cm
Seeing     Slight flickering Clear
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Watec 120N at 25fps.