An 8.5 second occultation was recorded by Diana Watson, using visual technique.

View the updated prediction.

Observers:
  1(M) B Allen,Blenheim, NZ
  2    D Watson,Thornton near Whakatane, NZ
  3(P) Predicted  26 Sept

    

Discussion:

The circle above is plotted at the expected 87 km diameter of Cheruskia. With only one chord it is not possible to determine whether Diana was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the longer than expected chord of about 90 km would suggest that the chord might lie close to the central portion of the asteroid.
At first Bill seemed to have a signal buried in noise but after taking Diana's clear positive into consideration, I have reached the conclusion that Bill was north of the path and only had noise in his lightcurve. Past occultion observations have confirmed an oval shape with major axis about 84 km so it is not feasible for both locations to have observed the event.

Observational Data:

Observation details for MP (568) Cheruskia
By Star              UCAC2 39243449
On 2008-10-01  at 11:42:00.0
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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: Datum NZ1949 (topographical map) Very good observing conditions. SBIG STL 1001E camera used at f15 focus.


_______________________________

Observer   Diana Watson
Location   Thornton near Whakatane
Longitude  +176:51:48.4
Latitude   -37:55:30.1
Altitude   3 m
Datum      Other
Telescope SCT including Cass and Mak
Aperture  200 cm
Seeing     Steady Clear
Timing     Tape Recorder + time signal Visual, no PE applied
Disappearance  11:42:20.10
Reappearance   11:42:28.60
Comments: timed when shadow completely covered over the star and when star returned to full brightness.