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ASTROMETRIC UPDATE:
OCCULTATION BY (943) BEGONIA - 2010 Feb 05

[Detailed Finder Charts]


Updated:   2009 DEC 27, 14:00 UT

Event Rank : 83

(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.

Begonia Update Map


On 2010 Feb 05 UT, the 69 km diameter asteroid (943) Begonia will occult a 11.2 mag star in the constellation Gemini for observers along a path across Western Australia from Eucla to Eigthty Mile Beach.

In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 13.6 mag (the magnitude of the asteroid) for at most 11.7 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
    131  3 48   -35  0  0   13  8  6    32   353   -29  131 32 28  130 35  4  132  7 58  129 59 23
    130 27 33   -34  0  0   13  8 18    33   354   -30  130 55 58  129 59  6  131 31  7  129 23 46
    129 51 17   -33  0  0   13  8 31    34   354   -30  130 19 26  129 23  5  130 54 16  128 48  4
    129 14 57   -32  0  0   13  8 44    35   355   -31  129 42 52  128 47  0  130 17 24  128 12 16
    128 38 32   -31  0  0   13  8 58    36   355   -31  129  6 13  128 10 48  129 40 29  127 36 20

    128  2  0   -30  0  0   13  9 11    38   356   -31  128 29 28  127 34 28  129  3 29  127  0 16
    127 25 20   -29  0  0   13  9 26    39   357   -32  127 52 37  126 58  0  128 26 22  126 24  1
    126 48 30   -28  0  0   13  9 40    40   357   -32  127 15 37  126 21 21  127 49  9  125 47 36
    126 11 30   -27  0  0   13  9 55    41   358   -32  126 38 26  125 44 30  127 11 46  125 10 57
    125 34 17   -26  0  0   13 10 10    42   358   -33  126  1  5  125  7 27  126 34 13  124 34  4

    124 56 51   -25  0  0   13 10 26    43   359   -33  125 23 30  124 30  9  125 56 29  123 56 56
    124 19 10   -24  0  0   13 10 42    44   360   -33  124 45 42  123 52 35  125 18 31  123 19 32
    123 41 13   -23  0  0   13 10 58    45     1   -33  124  7 38  123 14 44  124 40 18  122 41 49
    123  2 58   -22  0  0   13 11 15    46     1   -34  123 29 17  122 36 35  124  1 50  122  3 47
    122 24 24   -21  0  0   13 11 31    47     2   -34  122 50 38  121 58  6  123 23  5  121 25 24

    121 45 30   -20  0  0   13 11 49    48     3   -34  122 11 39  121 19 16  122 44  0  120 46 39
    121  6 14   -19  0  0   13 12  6    49     4   -34  121 32 20  120 40  4  122  4 36  120  7 31
    120 26 35   -18  0  0   13 12 24    49     5   -34  120 52 38  120  0 27  121 24 50  119 27 58
    119 46 31   -17  0  0   13 12 42    50     6   -34  120 12 32  119 20 26  120 44 42  118 47 59
    119  6  1   -16  0  0   13 13  1    51     7   -34  119 32  1  118 39 57  120  4  9  118  7 32

Uncertainty in time = +/- 8 secs

Prediction of 2009 Dec 27.0

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