A 5.28 second occultation was recorded by Graeme McKay, using Video OSD technique.

View the updated prediction.

Observers:
  1(M) B Allen,Blenheim, NZ
  2    G McKay,Papakowhai,Porirua,NZ
  3(M) D Herald,Kambah,ACT,AU
  4(P) Prediction   11 June

    

Discussion:

The ellipse above is plotted at 108 x 98 km which gives the same area as the expected 103 km diameter of Vanadis. The ellipse is based on data from http://obswww.unige.ch/~behrend/page1cou.html With only one chord it is not possible to determine whether Graeme was north or south of the central line of the event. However, Bill and Dave's misses suggest that he might lie slightly south of the central portion of the asteroid.

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

Observational Data:

Observation details for MP (240) Vanadis
By Star              UCAC2 25778854
On 2009-06-15  at 10:16:15.0
_______________________________

Observer   Bill Allen
Location   Blenheim, NZ
Longitude  +173:50:21.4
Latitude   -41:29:30.
Altitude   38 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   40 cm
Seeing     Steady Clear
Timing     Tape Recorder + time signal Drift scan

Missed

Comments: Very good observing conditions temp 10.1, no wind.

_______________________________

Observer   G McKay
Location   Papakowhai
Longitude  +174:51:48.3
Latitude   -41:07:7.6
Altitude   55 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Slight flickering Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  10:15:57.65
Reappearance   10:16:02.93
Comments: Star was almost at limit of visibility/detectability in PC164 camera.
Analysed using LiMovie.

_______________________________

Observer   Dave Herald
Location   Kambah
Longitude  +149:03:48.9
Latitude   -35:23:49.3
Altitude   583 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   35 cm
Seeing     Steady Broken cloud
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Predicted time was 10:19:37. Acquired star and started recording just
7 secs earlier. Cloud a problem, but definitely no occultation in the observed period.