A Four well spread chords were recorded by John Broughton, using video OSD technique.

One chord using a Canon D50 DSLR camera taking picture at approximately 1.3 second intevals was made by Stephen Mudge.
and another by Stephen Broderick using a video camera at Toowoomba. And Five clearly observed misses were recorded. And a further 3 obsrvers had cloud or techincal problems.

View the updated prediction.

Observers:
   1(M) D Watson,Thornton near Whakatane, NZ
  2(M) P Anderson,THE GAP,Brisbane,QLD,AU
  3(M) T.Napier-Munn,Brisbane, QLD,AU
  4    S Mudge,Willowbank,QLD,AU
  5    J Broughton,Reedy Creek, QLD, AU
  6    J Broughton,Clothiers Creek, NSW, AU
  7    S Broderick,Toowoomba, QLD,AU
  8    J Broughton,Brunswick Heads, NSW, AU
  9    J Broughton,Bangalow, NSW, AU
 10(M) J Talbot,Waikanae Beach, NZ
 11(M) M Forbes,Lower Hutt
 12(P) Prediction, 04 July
        

Discussion:

The ellipse above is plotted at the best fit axis ratio of just the GPS timed chords. With 5 chords we can be confident of the path of Emanuela and that it was about 17 km north of the predicted line.

Sadly there is no Damit/ISAM/Miriade 3D model to help refine the analysis. Light curve data had suggested a maximum axis ratio of only 1.05:1 but if we constrain the ellispe by chord 3 then we have measured ratio about 1.52:1

Observational Data:

Observation details for MP ( 576 ) Emanuela
By Star              HIP HIP94645
On 2013-07-26  at 08:51:03.0

_______________________________

Observer   John Talbot
Location   Waikanae Beach, NZ
Longitude  +175:01
Latitude   -40:51
Altitude   5 m
Datum      WGS84
Telescope Newtonian
Aperture   25 cm
Seeing     Slight flickering Clear
Camera Type  KPC-350BH      PAL/CCIR
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis

Missed

Comments: Clear, windy, On target, Definite miss. A two frame dip caused by
wind shake but star reamins visible.
Report prepopulated by IOTA Reporting Add-in for OW ver.1.7

_______________________________

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
Camera Type
Camera Delay
Timing     Tape Recorder + time signal Visual, no PE applied

Missed

Comments: some ground mist

_______________________________

Observer   John Broughton
Location   Reedy Creek, QLD, AU
Longitude  +153:23
Latitude   -28:06
Altitude   65 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture    7 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay 0.05
Timing     GPS - time inserted Video with frame analysis
Disappearance  08:54:36.26
Reappearance   08:54:46.50
Comments: Telescope prepointed several days in advance to provide time for
setting up mobile stations in the early evening.

_______________________________

Observer   John Broughton
Location   Clothiers Creek, NSW, AU
Longitude  +153:31
Latitude   -28:20
Altitude   15 m
Datum      WGS84
Telescope Refractor
Aperture    3 cm
Seeing     Slight flickering Clear
Camera Type  Other integrating            PAL/CCIR
Camera Delay 0.07
Timing     GPS - other linking Video with frame analysis
Disappearance  08:54:34.83
Reappearance   08:54:44.35
Comments: Camera: LN-300-11673 This miniature recording station has a base
sitting on a heavy paving stone set into the ground and prepointed 19 days
in advance.    That enabled it to be placed back in position during daylight,
giving enough time in the dark to set up two stations further south.

_______________________________

Observer   John Broughton
Location   Brunswick Heads, NSW, AU
Longitude  +153:32
Latitude   -28:32
Altitude   16 m
Datum      WGS84
Telescope Newtonian
Aperture   10 cm
Seeing     Slight flickering Clear
Camera Type  Other integrating            PAL/CCIR
Camera Delay 0.05
Timing     GPS - other linking Video with frame analysis
Disappearance  08:54:34.31
Reappearance   08:54:42.03
Comments: Camera: LN-300-11673

_______________________________

Observer   John Broughton
Location   Bangalow, NSW, AU
Longitude  +153:29
Latitude   -28:42
Altitude   16 m
Datum      WGS84
Telescope Refractor
Aperture    3 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N+       PAL/CCIR
Camera Delay 0.07
Timing     GPS - other linking Video with frame analysis
Disappearance  08:54:37.33
Reappearance   08:54:38.29
Comments:

_______________________________

Observer   Stephen Mudge
Location   Willowbank,QLD,AU
Longitude  +152:40
Latitude   -27:41
Altitude   45 m
Datum      WGS84
Telescope Refractor
Aperture    5 cm
Seeing     Steady Clear
Camera Type  Visual         Other
Camera Delay 0
Timing     other Only duration timed
Disappearance  08:54:25.16
Reappearance   00:00:34.85
Comments: Canon 50D and 70-200mm telephoto lens,
capturing a series of 1 sec exposures at f/4 and 3200 iso
A write up by Stephen Mudge of his observation can
be found at Ice In Space

John Broughton writes:
After verifying the cadence and photometry of Stephen Mudge's images, the
duration is now revised up to 9.87 +/- 0.18; a figure Stephen and I both
agree on. The uncertainty is higher than the adjacent Reedy Creek chord
because the reappearance is taken to have occurred in the middle of a 0.36s
dead period when the camera was blind.

John Talbot Notes:
As Stephen was only able to accurately measure the elapsed time the absolute times
of the D and R have been adjusted to align with John Broughton's nearly chord.
This chord has been assigned a lower weight than the John's observations on
account of the higher uncertainty and dependency on them for absolute timing.

_______________________________

Observer   Peter Anderson
Location   THE GAP,Brisbane,QLD,AU
Longitude  +152:55
Latitude   -27:27
Altitude   170 m
Datum      WGS84
Telescope Newtonian
Aperture   41 cm
Seeing     Steady Clear
Camera Type  Visual
Camera Delay 0
Timing     Tape Recorder + time signal Visual, PE applied

Missed

Comments: The area cleared of light cloud by the time monitoring began.
Images were relatively steady.  DEFINITELY NO EVENTS - A MISS

_______________________________

Observer   Murray Forbes
Location   Lower Hutt
Longitude  +174:58
Latitude   -41:09
Altitude   25 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Steady Clear
Camera Type  KPC-350BH      PAL/CCIR
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:   Report prepopulated by IOTA Reporting Add-in for OW ver.1.7
_______________________________

Observer   Stephen Broderick
Location   Toowoomba, QLD,AU
Longitude  +151:55
Latitude   -27:33
Altitude   620 m
Datum      WGS84
Telescope
Aperture    0 cm
Seeing      Clear
Camera Type
Camera Delay 0
Timing     other Video with frame analysis
Disappearance  08:54:41.00  
Reappearance   08:54:51.00  
Comments:
{times adjusted  +6.5 sec to align with GPS timed chords jt)

I videoed the occultation last night in Toowoomba.
    The star HIP94645 disappeared at 6:54:41 and
    reappeared at 6:54:51. (10 seconds).
    I can send the video if you need it. Thanks for the opportunity you
    presented me with after reading your article in Sky and Telescope. It
    was my first asteroid occultation so I was pretty happy with the
    results and process in general.
    Regards,
    Stephen Broderick, St Ursula´s College
_______________________________

Observer   Tim Napier-Munn
Location   Bellbowrie,Brisbane, QLD,AU
Longitude  +152:53
Latitude   -27:33
Altitude   53 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   36 cm
Seeing     Slight flickering Clear
Camera Type  Visual
Camera Delay 0
Timing     Stopwatch Visual, no PE applied

Missed