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OCCULTATION OF TYC 7910-02567-1 BY (804) HISPANIA
2007 APRIL 09


An occultation of about 10 seconds was recorded by Diana Watson, Whakatane, New Zealand using visual observations.

View the updated prediction.

Observers:
  1    D Watson, Whakatane, New Zealand
  2    Predicted

Hispania occultation - 2007 April 09

Discussion:

The circle above is plotted at the expected 158 km diameter. With only one chord it is not possible to say which side of the MP Diana observed. The plot has assumed the option that places the center closer to the predicted path.

Observational Data:

TELESCOPE DETAILS:
Aperture (cm)                    : 20
Focal length (cm)                : 200
Type (e.g. SCT; Newtonian)       : Celestron 8
Magnification                    : 160 times
Observing site name              : Whakatane
Longitude (DD MM SS ; East +ve)  : 176 51 50.7
Latitude (DD MM SS ; South -ve)  : -37 55 18.5
Height above Sealevel (metres)   : 2.8 metres
Geodetic Datum (e.g.WGS84,NZ1949): WGS84
Height Datum (if known)          : 

Sky Transparency (Delete two)    : Fair     
Star Image Stability (Delete two): Fair   
Other Conditions:  
     (Wind, Clouds, Lights, etc.): Moonlight, ground mist

Time Source (e.g. WWVH, GPS)     : WWVH
Recording method (e.g. tape)     : tape recorder
Could you see the Asteroid?      : Yes
Approx. Limiting Magnitude       : 13
                                          | Estimated  |
                           Universal Time | Reaction   | Accuracy, Remarks
                              h  m  s     | Time (sec) | 
Started Observing          : 13:05:00.0
Star and Object Merged     : 13:03:00.0   during this minute
Disappearance At           : 13:11:04.2   possibly 1 or 2seconds slow
Reappearance At            : 13:11:14.0   timed as star reached maximum
Star and Object Separated  : 13:22:00.0   by this minute 
Stopped Observing          : 13:19:00.0

Was your reaction time (also known as Personal Equation) subtracted from 
any of the above timings?  : 
If YES, state value        : 
If you could tell, in which direction did the asteroid pass relative to 
the star (Delete three)    : NORTH, SOUTH, EAST, or WEST

If possible, estimate the DISTANCE OF CLOSEST APPROACH in arc seconds: 

ADDITIONAL COMMENTS: 

Challenging occultation! Low magnitude star, bright moon near, the threatening cloud slowly drifting towards the target area kindly evaporated but there was a good ground mist which caused air disturbance. Good that I was able to check out the area the previous evening, under similar conditions, took a while locating it. So it did not take me long next night, then there were two possible target stars, time showed which pair were slowly coming together. I thought that the star would dim not disappear, so timing was slow when I realized I was seeing nothing, one or even two seconds slow. Lots of thoughts and doubts flashed through my mind in those approx. ten seconds waiting to see if the star would reappear, then suddenly the minor planet slipped off the star and I feel that I timed it just as the star reached maximum brightness.

Return to 2007 occultation results



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