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ASTROMETRIC UPDATE:
OCCULTATION BY (980) ANACOSTIA - 2009 JAN 25

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2009 JAN 22, 17:38 UT

Event Rank : 96

(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.

Anacostia Update Map


On 2009 Jan 25 UT, the 86 km diameter asteroid (980) Anacostia will occult a 10.1 mag star in the constellation Taurus for observers along a path across southern Queensland and central South Australia.

In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 12.3 mag (the magnitude of the asteroid) for at most 9.7 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, 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
    126 55  6   -37  0  0   15 27 32    19   326   -34  125 17  2  128 39 14  123 58 36  130 12 25
    127 50 13   -36  0  0   15 27 18    20   326   -35  126 10 21  129 36 39  124 50 42  131 12 18
    128 50 14   -35  0  0   15 27  2    20   325   -36  127  8  5  130 39 35  125 46 52  132 18 25
    129 55 38   -34  0  0   15 26 46    21   323   -37  128 10 36  131 48 44  126 47 25  133 31 39
    131  7  6   -33  0  0   15 26 30    21   322   -38  129 18 26  133  4 59  127 52 48  134 53 17

    132 25 33   -32  0  0   15 26 12    21   321   -39  130 32 15  134 29 39  129  3 34  136 25  8
    133 52 15   -31  0  0   15 25 52    21   320   -40  131 52 59  136  4 37  130 20 25  138 10  7
    135 29  5   -30  0  0   15 25 32    21   318   -41  133 21 55  137 52 54  131 44 20  140 13 14
    137 18 53   -29  0  0   15 25  9    21   317   -42  135  0 52  139 59 37  133 16 43  142 44 36
    139 26 36   -28  0  0   15 24 44    20   315   -43  136 52 43  142 35 12  134 59 31  146 12 36

    140  0  0   -27 45 56   15 24 38    20   315   -43  -26 36 21  -28 59 50  -25 40 42  -30  5 57
    141  0  0   -27 22 17   15 24 27    20   314   -43  -26 13 41  -28 35  0  -25 18 46  -29 39 54
    142  0  0   -27  0 39   15 24 16    19   313   -43  -25 52 55  -28 12 19  -24 58 38  -29 16 11
    143  0  0   -26 40 59   15 24  6    19   313   -43  -25 34  2  -27 51 45  -24 40 18  -28 54 42
    144  0  0   -26 23 14   15 23 56    18   312   -43  -25 16 57  -27 33 12  -24 23 43  -28 35 22

    145  0  0   -26  7 22   15 23 46    18   311   -43  -25  1 40  -27 16 39  -24  8 52  -28 18  7
    146  0  0   -25 53 20   15 23 37    17   311   -43  -24 48  8  -27  2  2  -23 55 42  -28  2 56
    147  0  0   -25 41  8   15 23 27    17   310   -43  -24 36 21  -26 49 20  -23 44 13  -27 49 45
    148  0  0   -25 30 42   15 23 18    16   309   -43  -24 26 16  -26 38 31  -23 34 23  -27 38 32
    149  0  0   -25 22  4   15 23 10    16   309   -43  -24 17 54  -26 29 34  -23 26 13  -27 29 16

    150  0  0   -25 15 11   15 23  2    15   308   -43  -24 11 13  -26 22 27  -23 19 41  -27 21 55
    151  0  0   -25 10  3   15 22 54    14   308   -43  -24  6 13  -26 17 10  -23 14 47  -27 16 29
    152  0  0   -25  6 40   15 22 46    14   307   -42  -24  2 54  -26 13 43  -23 11 30  -27 12 58
    153  0  0   -25  5  3   15 22 39    13   306   -42  -24  1 16  -26 12  5  -23  9 52  -27 11 21
    154  0  0   -25  5 10   15 22 32    12   306   -41  -24  1 19  -26 12 18  -23  9 52  -27 11 38

    155  0  0   -25  7  3   15 22 26    12   305   -41  -24  3  3  -26 14 20  -23 11 30  -27 13 50
Uncertainty in time = +/- 4 secs

[Prediction of 2009 Jan 23.0]

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