A 9.1 second occultation was recorded by Brian Loader, using Video-OSD technique.

View the updated prediction.

Observers:
  1    B Loader,Darfield, NZ
  2(P) Prediction 28 Jan

    

Discussion:

The ellipse above is plotted at the same area as the expected 75 km diameter of Etheridgea using ellipse parameters from the Geneva Observatory database. With only one chord it is not possible to determine whether Brian was north or south of the central line of the event. However, the longer than expected chord of about 83 km would suggest that the chord might lie close to the central portion of the asteroid.

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

Observational Data:

Observation details for MP (331) Etheridgea
By Star              TYC 6379-01473-1
On 2009-06-02  at 16:10:51.0

_______________________________

Observer   Brian Loader
Location   Darfield, NZ
Longitude  +172:06:24.4
Latitude   -43:28:52.9
Altitude   210 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Steady Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  16:10:28.00
Reappearance   16:10:37.10
Comments: Watec 120N at 4 fold integration.
The faint image remained for 3 groups of frames, ie ca 0.5 seconds.
Visually it was brightest  in the middle set of the 3 when it was
quite definite, although not shown up well by Limovie.