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ASTROMETRIC UPDATE:
OCCULTATION BY (693) ZERBINETTA - 2009 Aug 18

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2009 JUL 16, 01:33 UT

Event Rank : 43

(The event Rank is a measure of the likelihood of observing an event, and is equal to the probability of at least one successful observation by a team of two observers spaced 1/8 path width just inside opposite sides of the predicted path. An event rank of 100 indicates that the prediction is expected to be very accurate).


THE UPDATED PATH

Note: The duration given in the line below is the interval during which the occultation shadow sweeps across the Earth - please see the minute markers on the map to determine the approximate time for your location.

Zerbinetta Update Map


On 2009 Aug 18 UT, the 68 km diameter asteroid (693) Zerbinetta will occult a 12.5 mag star in the constellation Scorpius for observers along a south-to-north path across Australia beginning just west of Adelaide and running north along the Northern Territory - Queensland border.

In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 14.3 mag (the magnitude of the asteroid) for at most 9.0 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC.

Additional details of this and other events are available at Steve Preston's website at http://www.asteroidoccultation.com/

EVENT DETAILS SUMMARY : Data for the target star : Data for the minor planet : The Occultation Path :
                   Centre              Star  Star   Sun      Path Limits           Error Limits
  E. Longitude   Latitude      U.T.    Alt    Az   Alt    Limit 1    Limit 2    Limit 3    Limit 4
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
                                                        Longitude  Longitude  Longitude  Longitude
    138 31 57   - 6  0  0   10 56 46    56   180   -32  138 50 24  138 13 29  139 46  6  137 17 44
    138 29 20   - 7  0  0   10 56 33    57   180   -32  138 47 49  138 10 51  139 43 38  137 14 59
    138 26 40   - 8  0  0   10 56 21    58   180   -32  138 45 12  138  8  8  139 41  9  137 12  8
    138 23 57   - 9  0  0   10 56  8    59   180   -33  138 42 31  138  5 22  139 38 37  137  9 12
    138 21  9   -10  0  0   10 55 56    60   179   -33  138 39 47  138  2 31  139 36  3  137  6 11

    138 18 17   -11  0  0   10 55 43    60   179   -33  138 36 59  137 59 35  139 33 25  137  3  4
    138 15 20   -12  0  0   10 55 30    61   179   -33  138 34  6  137 56 34  139 30 45  136 59 51
    138 12 18   -13  0  0   10 55 17    62   179   -33  138 31  9  137 53 28  139 28  1  136 56 31
    138  9 11   -14  0  0   10 55  3    63   179   -33  138 28  6  137 50 16  139 25 13  136 53  4
    138  5 58   -15  0  0   10 54 50    64   178   -33  138 24 58  137 46 57  139 22 21  136 49 30

    138  2 39   -16  0  0   10 54 37    65   178   -33  138 21 45  137 43 32  139 19 24  136 45 48
    137 59 13   -17  0  0   10 54 23    66   178   -33  138 18 25  137 40  0  139 16 22  136 41 58
    137 55 40   -18  0  0   10 54  9    67   177   -33  138 14 58  137 36 21  139 13 15  136 37 58
    137 51 59   -19  0  0   10 53 56    68   177   -33  138 11 24  137 32 33  139 10  2  136 33 50
    137 48 10   -20  0  0   10 53 42    69   177   -33  138  7 43  137 28 37  139  6 43  136 29 31

    137 44 13   -21  0  0   10 53 28    70   176   -32  138  3 53  137 24 32  139  3 17  136 25  2
    137 40  6   -22  0  0   10 53 14    71   176   -32  137 59 55  137 20 17  138 59 43  136 20 22
    137 35 50   -23  0  0   10 52 59    72   175   -32  137 55 48  137 15 52  138 56  2  136 15 30
    137 31 24   -24  0  0   10 52 45    73   175   -32  137 51 31  137 11 16  138 52 13  136 10 26
    137 26 46   -25  0  0   10 52 31    74   174   -32  137 47  3  137  6 29  138 48 15  136  5  9

    137 21 57   -26  0  0   10 52 17    75   173   -32  137 42 24  137  1 29  138 44  8  135 59 38
    137 16 56   -27  0  0   10 52  2    76   172   -32  137 37 34  136 56 17  138 39 50  135 53 52
    137 11 41   -28  0  0   10 51 48    77   171   -32  137 32 31  136 50 51  138 35 22  135 47 51
    137  6 13   -29  0  0   10 51 33    78   170   -31  137 27 15  136 45 11  138 30 42  135 41 33
    137  0 30   -30  0  0   10 51 18    79   168   -31  137 21 45  136 39 15  138 25 51  135 34 58

    136 54 32   -31  0  0   10 51  4    80   166   -31  137 16  0  136 33  3  138 20 46  135 28  5
    136 48 17   -32  0  0   10 50 49    81   164   -31  137  9 59  136 26 34  138 15 28  135 20 53
    136 41 44   -33  0  0   10 50 34    82   161   -31  137  3 41  136 19 46  138  9 55  135 13 19
    136 34 53   -34  0  0   10 50 19    82   158   -30  136 57  6  136 12 39  138  4  7  135  5 24
    136 27 42   -35  0  0   10 50  4    83   153   -30  136 50 11  136  5 11  137 58  2  134 57  6

    136 20 10   -36  0  0   10 49 49    84   147   -30  136 42 57  135 57 22  137 51 39  134 48 24
    136 12 15   -37  0  0   10 49 35    84   139   -30  136 35 21  135 49  9  137 44 58  134 39 15
    136  3 57   -38  0  0   10 49 20    85   129   -29  136 27 22  135 40 31  137 37 57  134 29 39
    135 55 14   -39  0  0   10 49  5    85   116   -29  136 18 58  135 31 28  137 30 34  134 19 33
    135 46  3   -40  0  0   10 48 50    85   101   -29  136 10  9  135 21 56  137 22 49  134  8 56

Uncertainty in time = +/- 14 secs

Prediction of 2009 Jul 16.0

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