A 3.39 sec occultaion was observed By John Broughton at Reedy Creek, QLD and a miss observed by Dave Gault at Hakesbury Heights, NSW.

View the updated prediction.

Observers:
  1 J. Broughton, Reedy Creek, QLD, Australia
  2 D Gault, Wiruna, NSW, Australia   
  3 Pedicted 

Discussion:

The circle above is plotted at the expected 142km diameter of Helio. With only one chord it is not possible to say which side of John's location the central path was, but it appears that he was very close to the predicted centre line and close to the actual centre line.

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

Observational Data:

Observer's Name                  : John Broughton
TELESCOPE DETAILS:
Aperture (cm)                    : 25.4
Focal length (cm)                : 169
Type (e.g. SCT; Newtonian)       : SCT
Magnification                    : CCD drift-scan at 5 pps, 50'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): Fair
Other Conditions:                  
     (Wind, Clouds, Lights, etc.): Full Moon
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       : 12.5
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 08:21:32.08       n/a       0.01
Disappearance At           : 08:22:14.54       n/a       0.06
Reappearance At            : 08:22:17.93       n/a       0.06
Stopped Observing          : 08:22:52.70       n/a       0.01
Duration                   :        3.39  

ADDITIONAL COMMENTS:  
This was another occultation observed from indoors with an altazimuth
telescope manually prepointed on a reference star; aided by the latest
version of ScanTracker. 
 http://www.users.bigpond.com/reedycrk/driftscantiming.htm

_____________________________________

Observer's Name                  : David Gault
TELESCOPE DETAILS:
Aperture (cm)                    : 25
Focal length (cm)                : 122
Type (e.g. SCT; Newtonian)       : EQ Newtonian
Magnification                    : N/A
Observing site name              : Dave's Skyshed
Longitude (DD MM SS ; East +ve)  : 150 38 27.8
Latitude (DD MM SS ; South -ve)  : -33 39 52.0
Height above Sealevel (metres)   : 286
Geodetic Datum (e.g.WGS84,NZ1949): WGS84 
Height Datum (if known)          : MSL

Sky Transparency (Delete two)    : Good
Star Image Stability (Delete two): Good
Other Conditions                 : Clouds
Time Source (e.g. WWVH, GPS)     : GPS-KIWI
Recording method (e.g. tape)     : Video
Could you see the Asteroid?      : NO
Approx. Limiting Magnitude       : 11.8
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 08:19 
Star and Object Merged     : 
Disappearance At           : No event
Estimated Closest Approach : 
                (if no D/R)
Reappearance At            : 
Star and Object Separated  : 
Stopped Observing          : 08:24

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