A 20.32 second occultation was recorded by Paul Tervit, using video OSD technique.

3 clearly observed misses were recorded for this event.

and 7 observers had equipment problems or failed to find the right field.

View the updated prediction.

Observers:
  1(M) B Loader,Darfield,NZ
  2(M) B Allen,Blenheim, NZ
  3    P Tervit, Oaks Observatory, Marton,NZ
  4(M) D Watson,Thornton near Whakatane,NZ
  5(P) Prediction 25 June
Attempted but No Observation:
    J Talbot, Waikanae Beach,NZ
    T Butt, Te Horo, NZ
    G McKay, Wellington, NZ
    O Moore, Foxton, NZ
    G Blow & Vicki Irons, Carter Obs, Wellington, NZ
    R Idaczyk, Wellington, NZ
    G Hudson, Titahi Bay, NZ
(I hope I have not left any one out)
    

Discussion:

The circle above is plotted at the expected 122 km diameter of Doris. With only one chord it is not possible to determine whether Paul was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the very close to maximum expected chord of about 122 km would suggest that the chord might lie close to the central portion of the asteroid.
The failure of many even experienced observers to find the field suggests that we all need more praactice! Thanks for so many having a go.

Observational Data:

Observation details for MP (48) Doris
By Star              TYC 5704-00208-1
On 2010-07-30  at 08:04:37.0

_______________________________

Observer   B. Loader
Location   Darfield,NZ
Longitude  +172:06
Latitude   -43:28
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

Missed

Comments: Watec 120N camera at 4x integration
Report prepopulated by IOTA Reporting Add-in for OW ver.1.5

_______________________________

Observer   Bill Allen
Location   Blenheim, NZ
Longitude  +173:50
Latitude   -41:29
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: Event not seen on drift scan profile
Perfect observing conditions, no wind.
Timer box synchronised with BepperSync to 0.01 seconds

_______________________________

Observer   Paul Tervit
Location   5 Oaks Observatory, Marton,NZ
Longitude  +175:22
Latitude   -40:04
Altitude   141 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Slight flickering Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  08:04:27.29
Reappearance   08:04:47.61
Comments: Target star found with high precision GOTO using sigma sgr as alignment.
Used ALADIN to confirm field of view with the aid of a StellaCam3 to Mag18
for final confirmation of target star.
Mag 11.8 star visible with modified KT&C KPC 350BM on mid gain
The occultation seen well with the monitor and confirmed with Lmovie frame analysis.

_______________________________

Observer   Diana Watson
Location   Thornton near Whakatane,NZ
Longitude  +176:51
Latitude   -37:55
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

Missed

Comments:
_______________________________

Attempted but No Observation:
    J Talbot, Waikanae Beach,NZ
    T Butt, Te Horo, NZ
    G McKay, Wellington, NZ
    O Moore, Foxton, NZ
    G Blow & Vicki Irons, Carter Obs, Wellington, NZ
    R Idaczyk, Wellington, NZ
    G Hudson, Titahi Bay, NZ