A 13.30 second occultation was recorded by John Broughton, using the CCD drift scan technique.

View the updated prediction.

Observers:
1 John Broughton, Reedy Creek, QLD, AU
2 Dave Gault, Hawksbury Heights, NSW,AU
3 Prediction 13 Jun

Discussion:

The circle above is plotted at the expected 210 km diameter of Metis. With only one chord it is not possible to determine whether John was north or south of the central line of the event. However, assuming the updated prediction was approximately correct with a 1 sigma error estimate of about 26 km the scenario above would seems the most probable.

The figures below show the drift-scan image of the occultation together and the data as analysed by John's Scanalyser software.

Observational Data:

Observer's Name                  : John Broughton
TELESCOPE DETAILS:
Aperture (cm)                    : 51
Focal length (cm)                : 138
Type (e.g. SCT; Newtonian)       : F/2.7 Astrograph 
Magnification                    : CCD drift-scan at 4.2 pps, 60'FOV 
Observing site name              : Reedy Creek, Gold Coast
Longitude (East +ve)             : +153 23' 49"
Latitude (South -ve)             : -28 06' 36"
Height above Sealevel (metres)   : 66
Geodetic Datum (e.g.WDD84,NZ1949): AGD66
Sky Transparency (Delete two)    : Good
Star Image Stability (Delete two): Good
Other Conditions:                  
     (Wind, Clouds, Lights, etc.):
Time Source (e.g. WWV, VNG)      : WWVH.
Recording method (e.g. tape)     : Tape.  
Could you see the Asteroid?      : Only combined light monitored.
Approx. Limiting Magnitude       : 15
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 11:14:44.74       n/a       0.01
Disappearance At           : 11:16:09.79       n/a       0.08
Reappearance At            : 11:16:23.09       n/a       0.08
Stopped Observing          : 11:17:24.00       n/a       0.01
Duration                   :       13.30     

ADDITIONAL COMMENTS:  
Rigorously timed CCD drift-scan measured in Scanalyzer.
The 0.7-magnitude drop produced a below-par timing accuracy result of 0.08.

_______________________________

Observer   Dave Gault
Location   Hawkesbury Heights
Longitude  +150:38:27.8
Latitude   -33:39:52.
Altitude   286 m
Datum      WGS84
Telelscope Newtonian
Apperture   25 cm
Seeing      
Timing     GPS - time inserted Video with frame analysis

Missed

Comments:  

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