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ASTROMETRIC UPDATE:
OCCULTATION BY (1013) TOMBECKA - 2009 Aug 30

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2009 JUL 29, 23:21 UT

Event Rank : 14

(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.

Tombecka Update Map


On 2009 Aug 30 UT, the 32 km diameter asteroid (1013) Tombecka will occult a 12.0 mag star in the constellation Corona Australis for observers along a narrow path across Western Australia.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.7 mag to 15.6 mag (the magnitude of the asteroid) for at most 6.0 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
    114 20 24   -13  0  0   14 40 20    51   224   -64  114 31 48  114  9  3  116 22 38  112 21 19
    114 39 14   -14  0  0   14 40  0    51   225   -64  114 50 43  114 27 48  116 42 22  112 39 19
    114 59  3   -15  0  0   14 39 40    52   227   -65  115 10 36  114 47 31  117  3  9  112 58 14
    115 19 52   -16  0  0   14 39 19    52   228   -65  115 31 31  115  8 14  117 25  1  113 18  5
    115 41 44   -17  0  0   14 38 59    53   229   -65  115 53 29  115 30  0  117 48  1  113 38 54

    116  4 40   -18  0  0   14 38 38    53   230   -65  116 16 32  115 52 49  118 12 11  114  0 42
    116 28 43   -19  0  0   14 38 16    53   231   -65  116 40 43  116 16 46  118 37 34  114 23 33
    116 53 56   -20  0  0   14 37 55    54   232   -64  117  6  3  116 41 51  119  4 12  114 47 28
    117 20 21   -21  0  0   14 37 34    54   234   -64  117 32 37  117  8  8  119 32  9  115 12 29
    117 48  2   -22  0  0   14 37 12    54   235   -64  118  0 26  117 35 40  120  1 28  115 38 40

    118 17  1   -23  0  0   14 36 50    55   236   -64  118 29 35  118  4 30  120 32 14  116  6  3
    118 47 24   -24  0  0   14 36 28    55   237   -64  119  0  8  118 34 42  121  4 30  116 34 42
                                                         Latitude   Latitude   Latitude   Latitude
    119  0  0   -24 24  7   14 36 19    55   238   -64  -23 59 45  -24 48 13  -19 50 44  -28 28 22
    120  0  0   -26 13  2   14 35 38    55   240   -63  -25 50  4  -26 35 48  -21 57  4  -30  4 50
    121  0  0   -27 53 23   14 34 59    55   243   -63  -27 31 35  -28 15  1  -23 51 48  -31 34 28

    122  0  0   -29 26 17   14 34 24    55   245   -62  -29  5 29  -29 46 56  -25 36 54  -32 58  1
    123  0  0   -30 52 39   14 33 50    55   247   -62  -30 32 44  -31 12 27  -27 13 45  -34 16  7
    124  0  0   -32 13 13   14 33 18    55   248   -61  -31 54  4  -32 32 15  -28 43 27  -35 29 20
    125  0  0   -33 28 35   14 32 47    55   250   -61  -33 10  7  -33 46 56  -30  6 52  -36 38  6
    126  0  0   -34 39 15   14 32 19    55   251   -60  -34 21 24  -34 56 59  -31 24 43  -37 42 48

    127  0  0   -35 45 39   14 31 51    54   253   -60  -35 28 22  -36  2 50  -32 37 33  -38 43 46
    128  0  0   -36 48  9   14 31 25    54   254   -59  -36 31 22  -37  4 50  -33 45 52  -39 41 19
    129  0  0   -37 47  4   14 31  0    53   255   -59  -37 30 45  -38  3 18  -34 50  5  -40 35 41
    130  0  0   -38 42 41   14 30 37    53   256   -58  -38 26 48  -38 58 30  -35 50 31  -41 27  7
    131  0  0   -39 35 15   14 30 14    53   256   -58  -39 19 45  -39 50 41  -36 47 31  -42 15 49

    132  0  0   -40 24 58   14 29 52    52   257   -57  -40  9 50  -40 40  3  -37 41 19  -43  1 57
    133  0  0   -41 12  3   14 29 31    52   258   -57  -40 57 15  -41 26 48  -38 32  9  -43 45 42
    134  0  0   -41 56 40   14 29 11    51   258   -56  -41 42 11  -42 11  7  -39 20 15  -44 27 13
    135  0  0   -42 38 58   14 28 52    50   259   -56  -42 24 46  -42 53  8  -40  5 47  -45  6 37
    136  0  0   -43 19  6   14 28 33    50   259   -55  -43  5 10  -43 32 59  -40 48 56  -45 44  2

Uncertainty in time = +/- 29 secs

Prediction of 2009 Jul 29.0

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