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ASTROMETRIC UPDATE:
OCCULTATION BY (1023) THOMANA - 2006 FEB 10

[Detailed Finder Charts]


Updated:   2006 FEB 03, 22:51 UT

Event Rank : 69

(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.

Thomana Update Map


On 2006 Feb 10 UT, the 58 km diameter asteroid (1023) Thomana will occult a 11.1 mag star in the constellation Hydra for observers along a path that crosses the southern end of the South Island of New Zealand around Dunedin and Queenstown. The shadow then traverses Australia beginning just south of Eden, runs along the whole length of the NSW/Victorian border, across central South Australia and central Western Australia leaving near Karratha.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 14.5 mag (the magnitude of the asteroid) for at most 4.6 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  '  "
                                                         Latitude   Latitude   Latitude   Latitude
    112  0  0   -18 36  3   14 43 16    63    23   -45  -18 16 13  -18 55 56  -17 42 40  -19 29 55
    113  0  0   -19  5 38   14 43  7    63    21   -46  -18 45 46  -19 25 33  -18 12  8  -19 59 36
    114  0  0   -19 35 23   14 42 58    63    19   -46  -19 15 28  -19 55 21  -18 41 47  -20 29 28
    115  0  0   -20  5 18   14 42 49    62    16   -46  -19 45 21  -20 25 19  -19 11 36  -20 59 29
    116  0  0   -20 35 22   14 42 40    62    14   -46  -20 15 23  -20 55 25  -19 41 34  -21 29 39

    117  0  0   -21  5 34   14 42 31    62    12   -47  -20 45 33  -21 25 39  -20 11 40  -21 59 58
    118  0  0   -21 35 54   14 42 22    62    10   -47  -21 15 51  -21 56  1  -20 41 54  -22 30 23
    119  0  0   -22  6 20   14 42 13    61     8   -47  -21 46 15  -22 26 30  -21 12 15  -23  0 55
    120  0  0   -22 36 52   14 42  4    61     6   -47  -22 16 45  -22 57  4  -21 42 42  -23 31 33
    121  0  0   -23  7 29   14 41 55    60     4   -47  -22 47 20  -23 27 43  -22 13 14  -24  2 15

    122  0  0   -23 38 10   14 41 46    60     2   -47  -23 17 59  -23 58 25  -22 43 50  -24 33  1
    123  0  0   -24  8 55   14 41 38    59   360   -47  -23 48 42  -24 29 11  -23 14 30  -25  3 50
    124  0  0   -24 39 41   14 41 29    59   358   -47  -24 19 27  -25  0  0  -23 45 12  -25 34 41
    125  0  0   -25 10 29   14 41 21    58   356   -47  -24 50 14  -25 30 49  -24 15 56  -26  5 33
    126  0  0   -25 41 18   14 41 12    58   354   -47  -25 21  1  -26  1 39  -24 46 41  -26 36 26

    127  0  0   -26 12  7   14 41  4    57   353   -47  -25 51 48  -26 32 29  -25 17 26  -27  7 18
    128  0  0   -26 42 54   14 40 56    57   351   -47  -26 22 34  -27  3 18  -25 48 11  -27 38  9
    129  0  0   -27 13 40   14 40 47    56   349   -46  -26 53 19  -27 34  5  -26 18 53  -28  8 57
    130  0  0   -27 44 22   14 40 39    55   348   -46  -27 24  1  -28  4 48  -26 49 34  -28 39 43
    131  0  0   -28 15  2   14 40 31    55   346   -46  -27 54 39  -28 35 28  -27 20 10  -29 10 24

    132  0  0   -28 45 36   14 40 23    54   345   -46  -28 25 13  -29  6  4  -27 50 43  -29 41  1
    133  0  0   -29 16  6   14 40 15    53   344   -45  -28 55 42  -29 36 34  -28 21 11  -30 11 32
    134  0  0   -29 46 29   14 40  8    52   342   -45  -29 26  4  -30  6 58  -28 51 33  -30 41 57
    135  0  0   -30 16 45   14 40  0    52   341   -45  -29 56 20  -30 37 14  -29 21 48  -31 12 14
    136  0  0   -30 46 54   14 39 53    51   340   -44  -30 26 29  -31  7 23  -29 51 56  -31 42 24

    137  0  0   -31 16 54   14 39 45    50   338   -44  -30 56 29  -31 37 24  -30 21 55  -32 12 24
    138  0  0   -31 46 45   14 39 38    49   337   -44  -31 26 19  -32  7 14  -30 51 46  -32 42 15
    139  0  0   -32 16 25   14 39 31    49   336   -43  -31 56  0  -32 36 55  -31 21 27  -33 11 56
    140  0  0   -32 45 55   14 39 24    48   335   -43  -32 25 30  -33  6 25  -31 50 57  -33 41 25
    141  0  0   -33 15 13   14 39 17    47   334   -43  -32 54 49  -33 35 42  -32 20 16  -34 10 42

    142  0  0   -33 44 19   14 39 10    46   333   -42  -33 23 55  -34  4 48  -32 49 24  -34 39 47
    143  0  0   -34 13 12   14 39  4    45   332   -42  -33 52 49  -34 33 41  -33 18 18  -35  8 38
    144  0  0   -34 41 52   14 38 57    45   331   -41  -34 21 29  -35  2 19  -33 47  0  -35 37 16
    145  0  0   -35 10 17   14 38 51    44   330   -41  -34 49 55  -35 30 44  -34 15 27  -36  5 39
    146  0  0   -35 38 27   14 38 44    43   329   -40  -35 18  6  -35 58 53  -34 43 40  -36 33 47

    147  0  0   -36  6 22   14 38 38    42   328   -40  -35 46  2  -36 26 47  -35 11 37  -37  1 38
    148  0  0   -36 34  1   14 38 32    41   327   -39  -36 13 42  -36 54 24  -35 39 19  -37 29 14
    149  0  0   -37  1 23   14 38 27    41   326   -39  -36 41  5  -37 21 45  -36  6 45  -37 56 32
    150  0  0   -37 28 28   14 38 21    40   325   -38  -37  8 12  -37 48 48  -36 33 53  -38 23 33
    151  0  0   -37 55 15   14 38 15    39   324   -38  -37 35  0  -38 15 34  -37  0 45  -38 50 16

    152  0  0   -38 21 44   14 38 10    38   323   -37  -38  1 31  -38 42  1  -37 27 18  -39 16 41
    153  0  0   -38 47 54   14 38  4    37   322   -36  -38 27 43  -39  8 10  -37 53 33  -39 42 47
    154  0  0   -39 13 46   14 37 59    37   321   -36  -38 53 36  -39 33 59  -38 19 29  -40  8 33
    155  0  0   -39 39 17   14 37 54    36   321   -35  -39 19 10  -39 59 29  -38 45  6  -40 33 59
    156  0  0   -40  4 29   14 37 49    35   320   -35  -39 44 23  -40 24 39  -39 10 23  -40 59  6

    157  0  0   -40 29 21   14 37 45    34   319   -34  -40  9 17  -40 49 29  -39 35 20  -41 23 51
    158  0  0   -40 53 52   14 37 40    33   318   -33  -40 33 50  -41 13 57  -39 59 57  -41 48 16
    159  0  0   -41 18  2   14 37 35    33   317   -33  -40 58  3  -41 38  5  -40 24 13  -42 12 20
    160  0  0   -41 41 51   14 37 31    32   316   -32  -41 21 54  -42  1 52  -40 48  9  -42 36  3
    161  0  0   -42  5 18   14 37 27    31   316   -32  -41 45 24  -42 25 17  -41 11 43  -42 59 24

    162  0  0   -42 28 24   14 37 23    30   315   -31  -42  8 32  -42 48 20  -41 34 55  -43 22 22
    163  0  0   -42 51  8   14 37 19    29   314   -30  -42 31 19  -43 11  1  -41 57 46  -43 44 59
    164  0  0   -43 13 30   14 37 15    29   313   -30  -42 53 43  -43 33 20  -42 20 14  -44  7 14
    165  0  0   -43 35 29   14 37 11    28   312   -29  -43 15 45  -43 55 17  -42 42 21  -44 29  6
    166  0  0   -43 57  6   14 37  7    27   312   -29  -43 37 25  -44 16 51  -43  4  5  -44 50 35

    167  0  0   -44 18 20   14 37  4    26   311   -28  -43 58 42  -44 38  3  -43 25 27  -45 11 42
    168  0  0   -44 39 12   14 37  1    26   310   -27  -44 19 36  -44 58 51  -43 46 26  -45 32 25
    169  0  0   -44 59 41   14 36 57    25   309   -27  -44 40  8  -45 19 17  -44  7  3  -45 52 46
    170  0  0   -45 19 46   14 36 54    24   309   -26  -45  0 17  -45 39 20  -44 27 16  -46 12 44
    171  0  0   -45 39 29   14 36 51    23   308   -26  -45 20  2  -45 59  0  -44 47  7  -46 32 19

    172  0  0   -45 58 49   14 36 48    23   307   -25  -45 39 25  -46 18 17  -45  6 35  -46 51 30

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