A 5.54 second occultation was recorded by John Broughton, using CCD Drift technique.

View the updated prediction.

Observers:
  1(M) C Wyatt,Armidale, NSW, AU
  2    J Broughton,Reedy Creek, QLD, AU
  3(P) Prediction 22 Aug

    

Discussion:

The circle above is plotted at the expected 121 km diameter of Diana. With only one chord it is not possible to determine whether John was north or south of the central line of the event. However, the duration is very close to the maximum expected. This would suggest that the chord might lie close to the central portion of the asteroid.

The figures below show the drift-scan image of the occultation together with the lightcurve as analysed by John's Scanalyser software.

Observational Data:

Observation details for MP (78) Diana
By Star              TYC 7361-00333-1
On 2008-09-25  at 10:42:00.0
_______________________________

Observer   Christopher G Wyatt
Location   Armidale, NSW
Longitude  +151:37:16.3
Latitude   -30:26:53.4
Altitude   1090 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   36 cm
Seeing     Slight flickering Clear
Timing     Tape Recorder + time signal Visual, no PE applied

Missed

Comments: Star was visible, miss from 62kms right.

_______________________________

Observer   J Broughton
Location   428 Reedy Creek,Reedy Creek, QLD 4227, Australia
Longitude  +153:23:52.8
Latitude   -28:06:30.3
Altitude   66 m
Datum      WGS84
Telescope SCT
Aperture   25 cm
Seeing     Slight flickering Clear
Timing     Tape Recorder + time signal + shutter Drift scan
Disappearance  10:42:04.29
Reappearance   10:42:09.83
Comments:
______________________________________