A 7.5 second occultation was recorded by Graeme McKay, using Video OSD technique.

Two clearly observed misses were recorded for this event.

A total of 10 stations had been registered but most were clouded out

View the updated prediction.

Observers:
  1    G McKay,Blenheim, New Zealand
  2(M) B Loader,Darfield,NZ
  3(M) A Yates,Halswell, New Zealand
  4(P) Prediction, 10 Jul


        

Discussion:

The circle above is plotted at the expected 290 km diameter of Juno. With one chord and the contraining misses to the South it is possible to assert that Graeme was South of the central line of the event. And had the weather been kinder another 6 chords may have been observed. The The ISAM 3D model has been overlaid on the measured circle and the size adjusted to about the same area. Evne with the roughly eliptical shape of the ISAM model the southern misses contrain the soloution as shown.

The figure below shows the Occular solution to the light curve of the occultation.

The slope of the D and R both show stellar diameter effects estimated to be about 0.5 mas.

Observational Data:

Observation details for MP ( 3 ) Juno
By Star              HIP HIP80159
On 2012-10-07  at 07:56:34.0

_______________________________

Observer   Graeme McKay
Location   Blenheim, New Zealand
Longitude  +173:57
Latitude   -41:32
Altitude   18 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   28 cm
Seeing     Steady Clear
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.09
Timing     GPS - time inserted Video with frame analysis
Disappearance  07:56:30.61
Reappearance   07:56:38.13
Comments: Clear Sky. Asteroid observed approaching star.
Report prepopulated by IOTA Reporting Add-in for OW ver.1.6

_______________________________

Observer   Alan Yates
Location   Halswell, New Zealand
Longitude  +172:33
Latitude   -43:34
Altitude   18 m
Datum      WGS84
Telescope Dobsonian
Aperture   20 cm
Seeing     Steady Clear
Camera Type
Camera Delay 0
Timing     Stopwatch Visual, PE applied

Missed

Comments:

_______________________________

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     Strong flickering Thin cloud < 2
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.03
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:   Report prepopulated by IOTA Reporting Add-in for OW ver.1.6