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OCCULTATION OF TYC 6740-00601-1 BY (7037) DAVIDLEAN
2007 FEBRUARY 09


Misses were recorded by John Broughton, Reedy Creek, QLD, and Peter Anderson,The Gap, QLD, Australia.

View the updated prediction.

Observers:
  1    John Broughton, Reedy Creek, QLD, Australia
  2    Peter Anderson,The Gap, QLD,  Australia

Davidlean occultation - 2007 February 09

Discussion:

The circle above is plotted at the expected 19km diameter of Davidlean. With no chords it is not possible to determine whether the observers were north or south of the central line of the event.

Observational Data:

J 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): Good
Other Conditions:                  
     (Wind, Clouds, Lights, etc.): 8 degrees from the 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       : 13
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 14:14:50.0        n/a       0.2
Disappearance At           : none
Reappearance At            : none
Stopped Observing          : 14:16:10.5        n/a       0.2

ADDITIONAL COMMENTS: The CCD drift-scan showed no events.  

--------------------------------------------------------------------------------

P Anderson
TELESCOPE DETAILS:
Aperture (cm)                    : 41
Focal length (cm)                : 245
Type (e.g. SCT; Newtonian)       : Newtonian
Magnification                    : X 198
Observing site name              : Taylor Range Observatory
Longitude (East +ve)             :  152 56 01.4580 
Latitude (South -ve)             : -27  27 47.5562

 
Height above Sea level (metres)  : 176.3

Sky Transparency (Delete two)    :   Good  
Star Image Stability (Delete two):   Good
Other Conditions:  
     (Wind, Clouds, Lights, etc.): Reasonably transparent,no cloud and no wind.

Time Source (e.g. WWVH, VNG)     : WWVH
Recording method (e.g. tape)     : Stopwatches and tape recorder
Could you see the Asteroid?      : No
Approx. Limiting Magnitude       : 14.0 to 14.5 but would've been better without moonlight
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 14 12 30
Star and Object Merged     :  
Disappearance At           : Definitely No events - Asteroid never seen
Estimated Closest Approach : 
                (if no D/R)
Reappearance At            : 
Star and Object Separated  : 
Stopped Observing          : 14 18 30


ADDITIONAL COMMENTS: 
Identification positive - Just nothing happened...Absolutely nothing...

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