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ASTROMETRIC UPDATE:
OCCULTATION BY (1731) SMUTS - 2006 OCT 20

[Detailed Finder Charts]


Updated:   2006 SEP 20, 17:16 UT

Event Rank : 58

(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.

Smuts Update Map


On 2006 Oct 20 UT, the 54 km diameter asteroid (1731) Smuts will occult a 10.2 mag star in the constellation Orion for observers along a significant uncertainty path beginning near Exmouth in Western Australia, running across central Australia, western and southern New South Wales, passing near Canberra and leaving near Cape Howe on the NSW/Victoria border.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.2 mag to 15.4 mag (the magnitude of the asteroid) for at most 11.8 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, 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
    153 43 52   -41  0  0   16 52 20    30    21   -21  152 59  4  154 28  3  151 20  2  156  1 33
    152 39 50   -40  0  0   16 51 49    31    23   -22  151 54 47  153 24 15  150 15  4  154 58  7
    151 33 46   -39  0  0   16 51 18    31    24   -23  150 48 21  152 18 30  149  7 43  153 52 56
    150 25 27   -38  0  0   16 50 45    32    26   -25  149 39 34  151 10 37  147 57 43  152 45 50
    149 14 40   -37  0  0   16 50 11    32    28   -26  148 28 10  150  0 22  146 44 47  151 36 37

    148  1  7   -36  0  0   16 49 35    32    29   -28  147 13 52  148 47 31  145 28 35  150 25  3
    146 44 29   -35  0  0   16 48 59    33    31   -29  145 56 18  147 31 44  144  8 41  149 10 52
    145 24 22   -34  0  0   16 48 20    33    33   -31  144 35  3  146 12 39  142 44 33  147 53 45
    144  0 17   -33  0  0   16 47 40    33    35   -32  143  9 34  144 49 51  141 15 32  146 33 20
    142 31 37   -32  0  0   16 46 59    33    37   -34  141 39 11  143 22 45  139 40 47  145  9 10

    140 57 37   -31  0  0   16 46 15    33    39   -36  140  3  3  141 50 40  137 59 11  143 40 40
    139 17 16   -30  0  0   16 45 30    33    41   -38  138 20  1  140 12 43  136  9 10  142  7  7
    137 29 13   -29  0  0   16 44 42    32    43   -40  136 28 32  138 27 42  134  8 31  140 27 38
    135 31 33   -28  0  0   16 43 51    31    46   -42  134 26 20  136 34  0  131 53 51  138 40 59
    133 21 27   -27  0  0   16 42 57    31    48   -44  132  9 59  134 29 15  129 19 24  136 45 29

    132  0  0   -26 25 45   16 42 24    30    50   -45  -26 55 53  -25 56  4  -28  2 35  -24 53 21
    131  0  0   -26  2  9   16 42  1    29    51   -46  -26 31 59  -25 32 44  -27 38  2  -24 30 34
    130  0  0   -25 39 53   16 41 38    29    52   -47  -26  9 27  -25 10 43  -27 14 53  -24  9  4
    129  0  0   -25 18 57   16 41 15    28    53   -48  -25 48 17  -24 50  2  -26 53  7  -23 48 52
    128  0  0   -24 59 20   16 40 53    28    53   -49  -25 28 26  -24 30 39  -26 32 44  -23 29 57

    127  0  0   -24 41  2   16 40 32    27    54   -49  -25  9 54  -24 12 33  -26 13 42  -23 12 17
    126  0  0   -24 24  1   16 40 11    26    55   -50  -24 52 41  -23 55 44  -25 56  0  -22 55 52
    125  0  0   -24  8 17   16 39 51    26    56   -51  -24 36 45  -23 40 11  -25 39 38  -22 40 41
    124  0  0   -23 53 48   16 39 32    25    57   -52  -24 22  6  -23 25 52  -25 24 34  -22 26 44
    123  0  0   -23 40 34   16 39 13    24    58   -52  -24  8 42  -23 12 48  -25 10 48  -22 13 59

    122  0  0   -23 28 35   16 38 55    24    58   -53  -23 56 34  -23  0 57  -24 58 18  -22  2 26
    121  0  0   -23 17 49   16 38 37    23    59   -53  -23 45 39  -22 50 19  -24 47  5  -21 52  4
    120  0  0   -23  8 15   16 38 20    22    60   -54  -23 35 58  -22 40 53  -24 37  6  -21 42 53
    119  0  0   -22 59 54   16 38  3    21    60   -55  -23 27 30  -22 32 38  -24 28 22  -21 34 52
    118  0  0   -22 52 43   16 37 47    21    61   -55  -23 20 13  -22 25 34  -24 20 51  -21 28  0

    117  0  0   -22 46 44   16 37 32    20    62   -55  -23 14  8  -22 19 40  -24 14 33  -21 22 17
    116  0  0   -22 41 54   16 37 18    19    62   -56  -23  9 13  -22 14 55  -24  9 27  -21 17 41
    115  0  0   -22 38 13   16 37  4    18    63   -56  -23  5 28  -22 11 18  -24  5 32  -21 14 13
    114  0  0   -22 35 41   16 36 51    17    63   -56  -23  2 53  -22  8 50  -24  2 48  -21 11 52
    113  0  0   -22 34 18   16 36 38    16    64   -57  -23  1 26  -22  7 29  -24  1 15  -21 10 37

    112  0  0   -22 34  1   16 36 26    16    64   -57  -23  1  7  -22  7 15  -24  0 50  -21 10 28

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