A 3.72 second occultation was recorded by Stu Parker, using video OSD technique.

Three other stations were clouded out or had technical problems for this event.

View the updated prediction.

Observers:
  2    S Parker,Oxford, NZ
  3(P) Prediction 20 Sept


    

Discussion:

The circle above is plotted at the expected 52 km diameter of Backlunda. With only one chord it is not possible to determine whether Stu was north or south of the central line of the event.

The figure below shows the Limovie light curve of the occultation. The red line is a sliding average filter (n=5), offset by 50 units to make it easier to see detail.

It was noted that both the D and R were both very slow at around 180 mSec and the possibility of a double star was discussed. However the concensus was that the step in the lighcurve was not clear enough and that the more likely explanation is a low angle of incidence and large star diameter.

Observational Data:

Observation details for MP (856) Backlunda
By Star              TYC 4718-00935-1
On 2009-10-24  at 11:43:00.0
_______________________________

Observer   Stuart Parker
Location   Oxford, NZ
Longitude  172:13:7.8
Latitude   -43:18:36.8
Altitude   221 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Steady Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  11:43:34.75
Reappearance   11:43:38.47
Comments: V.slow D+R Possible double. This event was easily visible and the seeing was good