A sub second occultation was recorded by Diana Watson, using visual technique.

View the updated prediction.

Observers:
  1    D Watson,Thornton near Whakatane,NZ
  2(P) Prediction 3 March
    

Discussion:

The circle above is plotted at the expected 12 km diameter of Amneris. With only one chord it is not possible to determine whether Diana was north or south of the central line of the event.
This is the first reported successful occultation observation of Amneris.

Observational Data:

Observation details for MP (871 ) Amneris
By Star              TYC 6269-00867-1
On 2010-04-20  at 16:32:15.0

_______________________________

Observer   Diana Watson
Location   Thornton near Whakatane,NZ
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  16:32:11.00
Reappearance   16:32:12.10
Comments: slight ground mist.  By the time I realised the star had disappeared
 I was a bit slow) my yes for the tape recorder coincided with the return of
the star to full brightness. I feel the disappearance was less than a second.
First time I have done one less than  about five second duration, need video!