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ASTROMETRIC UPDATE:
OCCULTATION BY (140) SIWA - 2004 FEB 02

[Prediction using OCCULT Software]

[Detailed Finder Charts]


UPDATE: 2004 JAN 06, 21:08 UT

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 the time for your location)

Siwa Update Map


On 2004 Feb 02 UT, the 109 km diameter asteroid (140) Siwa will occult a 10.4 mag star in the constellation Libra for observers along a path across S Australia.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 13.7 mag (the magnitude of the asteroid) for at most 5.6 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, astrometry for the asteroid kindly provided by Gordon Garradd, 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  '  "
                                                         Latitude   Latitude   Latitude   Latitude
    110  0  0   -23 26 38   18  1 34    22    95   -47  -24  3 11  -22 50 21  -24 33 19  -22 20 45
    111  0  0   -23 46 12   18  1 37    23    95   -46  -24 22 46  -23  9 51  -24 52 57  -22 40 14
    112  0  0   -24  5 53   18  1 39    24    94   -45  -24 42 30  -23 29 31  -25 12 42  -22 59 51

    113  0  0   -24 25 43   18  1 42    25    94   -44  -25  2 22  -23 49 18  -25 32 36  -23 19 37
    114  0  0   -24 45 40   18  1 45    26    93   -44  -25 22 21  -24  9 13  -25 52 37  -23 39 30
    115  0  0   -25  5 44   18  1 48    27    93   -43  -25 42 27  -24 29 15  -26 12 45  -23 59 31
    116  0  0   -25 25 55   18  1 51    28    92   -42  -26  2 40  -24 49 24  -26 33  0  -24 19 38
    117  0  0   -25 46 12   18  1 54    29    92   -41  -26 22 59  -25  9 39  -26 53 20  -24 39 51

    118  0  0   -26  6 34   18  1 57    30    91   -41  -26 43 23  -25 29 59  -27 13 46  -25  0 10
    119  0  0   -26 27  1   18  2  0    31    90   -40  -27  3 52  -25 50 25  -27 34 16  -25 20 34
    120  0  0   -26 47 33   18  2  3    31    90   -39  -27 24 25  -26 10 55  -27 54 51  -25 41  3
    121  0  0   -27  8  8   18  2  7    32    89   -38  -27 45  2  -26 31 29  -28 15 29  -26  1 36
    122  0  0   -27 28 47   18  2 10    33    88   -38  -28  5 43  -26 52  6  -28 36 11  -26 22 12

    123  0  0   -27 49 29   18  2 14    34    88   -37  -28 26 26  -27 12 47  -28 56 55  -26 42 52
    124  0  0   -28 10 13   18  2 17    35    87   -36  -28 47 11  -27 33 30  -29 17 42  -27  3 34
    125  0  0   -28 30 59   18  2 21    36    86   -35  -29  7 58  -27 54 15  -29 38 30  -27 24 18
    126  0  0   -28 51 46   18  2 25    37    85   -34  -29 28 47  -28 15  1  -29 59 19  -27 45  3
    127  0  0   -29 12 34   18  2 29    38    84   -33  -29 49 35  -28 35 48  -30 20  8  -28  5 49

    128  0  0   -29 33 22   18  2 33    38    84   -33  -30 10 24  -28 56 35  -30 40 58  -28 26 36
    129  0  0   -29 54 10   18  2 37    39    83   -32  -30 31 13  -29 17 22  -31  1 47  -28 47 22
    130  0  0   -30 14 57   18  2 41    40    82   -31  -30 52  0  -29 38  8  -31 22 35  -29  8  8
    131  0  0   -30 35 42   18  2 45    41    81   -30  -31 12 46  -29 58 53  -31 43 21  -29 28 52
    132  0  0   -30 56 25   18  2 49    42    80   -29  -31 33 30  -30 19 36  -32  4  5  -29 49 35

    133  0  0   -31 17  6   18  2 53    42    79   -28  -31 54 11  -30 40 17  -32 24 46  -30 10 16
    134  0  0   -31 37 44   18  2 57    43    78   -27  -32 14 49  -31  0 55  -32 45 25  -30 30 54
    135  0  0   -31 58 19   18  3  2    44    77   -27  -32 35 24  -31 21 29  -33  5 59  -30 51 28
    136  0  0   -32 18 50   18  3  6    45    76   -26  -32 55 54  -31 42  0  -33 26 30  -31 11 59
    137  0  0   -32 39 16   18  3 10    46    75   -25  -33 16 20  -32  2 26  -33 46 55  -31 32 25

    138  0  0   -32 59 37   18  3 15    46    74   -24  -33 36 41  -32 22 48  -34  7 16  -31 52 47
    139  0  0   -33 19 53   18  3 19    47    73   -23  -33 56 56  -32 43  4  -34 27 31  -32 13  4
    140  0  0   -33 40  3   18  3 24    48    71   -22  -34 17  5  -33  3 15  -34 47 39  -32 33 15
    141  0  0   -34  0  6   18  3 28    48    70   -21  -34 37  8  -33 23 19  -35  7 42  -32 53 20
    142  0  0   -34 20  3   18  3 33    49    69   -21  -34 57  4  -33 43 16  -35 27 37  -33 13 18

    143  0  0   -34 39 52   18  3 37    50    68   -20  -35 16 52  -34  3  7  -35 47 24  -33 33  9
    144  0  0   -34 59 34   18  3 42    50    66   -19  -35 36 33  -34 22 50  -36  7  4  -33 52 53
    145  0  0   -35 19  8   18  3 46    51    65   -18  -35 56  6  -34 42 24  -36 26 36  -34 12 28
    146  0  0   -35 38 33   18  3 51    52    64   -17  -36 15 30  -35  1 51  -36 45 59  -34 31 56
    147  0  0   -35 57 49   18  3 56    52    62   -16  -36 34 44  -35 21  8  -37  5 12  -34 51 14

    148  0  0   -36 16 56   18  4  0    53    61   -15  -36 53 50  -35 40 17  -37 24 17  -35 10 24
    149  0  0   -36 35 53   18  4  5    53    59   -15  -37 12 46  -35 59 16  -37 43 11  -35 29 24
    150  0  0   -36 54 41   18  4 10    54    58   -14  -37 31 31  -36 18  5  -38  1 55  -35 48 14
    151  0  0   -37 13 17   18  4 14    54    56   -13  -37 50  6  -36 36 43  -38 20 29  -36  6 54
    152  0  0   -37 31 44   18  4 19    55    54   -12  -38  8 30  -36 55 11  -38 38 51  -36 25 24

    153  0  0   -37 49 59   18  4 24    55    53   -11  -38 26 44  -37 13 28  -38 57  3  -36 43 42
    154  0  0   -38  8  2   18  4 28    56    51   -10  -38 44 45  -37 31 34  -39 15  3  -37  1 50
    155  0  0   -38 25 54   18  4 33    56    49   -10  -39  2 35  -37 49 28  -39 32 51  -37 19 45
    156  0  0   -38 43 34   18  4 38    57    47    -9  -39 20 13  -38  7 10  -39 50 26  -37 37 29
    157  0  0   -39  1  2   18  4 43    57    46    -8  -39 37 38  -38 24 40  -40  7 50  -37 55  1

    158  0  0   -39 18 17   18  4 47    57    44    -7  -39 54 51  -38 41 57  -40 25  1  -38 12 20
    159  0  0   -39 35 19   18  4 52    58    42    -6  -40 11 51  -38 59  2  -40 41 58  -38 29 27
    160  0  0   -39 52  9   18  4 57    58    40    -5  -40 28 37  -39 15 54  -40 58 43  -38 46 21
    161  0  0   -40  8 45   18  5  1    58    38    -5  -40 45 11  -39 32 32  -41 15 14  -39  3  1
    162  0  0   -40 25  7   18  5  6    58    36    -4  -41  1 31  -39 48 57  -41 31 32  -39 19 28

    163  0  0   -40 41 16   18  5 11    59    34    -3  -41 17 37  -40  5  9  -41 47 36  -39 35 42
    164  0  0   -40 57 11   18  5 15    59    32    -2  -41 33 29  -40 21  6  -42  3 26  -39 51 42
    165  0  0   -41 12 51   18  5 20    59    30    -1  -41 49  7  -40 36 50  -42 19  1  -40  7 27
    166  0  0   -41 28 18   18  5 24    59    28     0  -42  4 30  -40 52 19  -42 34 23  -40 22 59
    167  0  0   -41 43 30   18  5 29    59    26     0  -42 19 39  -41  7 34  -42 49 29  -40 38 16

    168  0  0   -41 58 27   18  5 34    59    24     1  -42 34 34  -41 22 34  -43  4 21  -40 53 18
    169  0  0   -42 13 10   18  5 38    59    22     2  -42 49 14  -41 37 19  -43 18 59  -41  8  6
    170  0  0   -42 27 37   18  5 43    60    20     3  -43  3 38  -41 51 50  -43 33 21  -41 22 39
    171  0  0   -42 41 50   18  5 47    60    18     4  -43 17 48  -42  6  6  -43 47 28  -41 36 57
    172  0  0   -42 55 48   18  5 52    60    16     4  -43 31 43  -42 20  6  -44  1 20  -41 51  0

    173  0  0   -43  9 30   18  5 56    60    14     5  -43 45 22  -42 33 51  -44 14 57  -42  4 47
    174  0  0   -43 22 57   18  6  1    59    12     6  -43 58 46  -42 47 21  -44 28 18  -42 18 20
    175  0  0   -43 36  8   18  6  5    59    10     7  -44 11 54  -43  0 36  -44 41 24  -42 31 37
    176  0  0   -43 49  4   18  6 10    59     8     7  -44 24 47  -43 13 34  -44 54 15  -42 44 38
    177  0  0   -44  1 44   18  6 14    59     6     8  -44 37 24  -43 26 18  -45  6 49  -42 57 23

    178  0  0   -44 14  9   18  6 18    59     4     9  -44 49 46  -43 38 45  -45 19  8  -43  9 53
    179  0  0   -44 26 18   18  6 23    59     2    10  -45  1 52  -43 50 57  -45 31 12  -43 22  8
    180  0  0   -44 38 11   18  6 27    59     0    10  -45 13 42  -44  2 53  -45 42 59  -43 34  6

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