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ASTROMETRIC UPDATE:
OCCULTATION BY (469) ARGENTINA - 2009 APR 03

[Detailed Finder Charts]


Updated:   2009 MAR 18, 17:43 UT

Event Rank : 63

(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.

Argentina Update Map


On 2009 Apr 03 UT, the 126 km diameter asteroid (469) Argentina will occult a 12.6 mag star in the constellation Scorpius for observers along a wide, somewhat uncertain path across central Western Australia.

In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 13.9 mag (the magnitude of the asteroid) for at most 12.7 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, 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 Limit1           Path Limit2           Error Limit1          Error Limit2
  E. Longitude    Latitude      U.T.    Alt   Az    Alt                                                                                       
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "
                                                         Longitude  Latitude   Longitude  Latitude   Longitude  Latitude   Longitude  Latitude
    112 56 23   -17  2 33   15 33 55    11   126   -72  114 52 44  -17 52 42  110 36 39  -15 53 52  118  3 45  -19  2  9  ... .. ..   .. .. ..
    115 23 53   -19 39 56   15 34  6    14   125   -72  117  1 11  -20 14 32  113 36 26  -18 57  8  119 50 29  -21  5 44  109 12 38  -16 49 54
    117 17 51   -21 50 51   15 34 18    17   124   -71  118 45 23  -22 17  6  115 44  6  -21 19 27  121 21 55  -22 57  1  112 15 42  -19 56 57
    118 53  6   -23 46 50   15 34 30    19   123   -70  120 14 39  -24  7 42  117 27  7  -23 22 14  122 42 47  -24 39 45  114 23 20  -22 20 27
    120 16  1   -25 32 54   15 34 42    21   122   -69  121 33 34  -25 49 56  118 55  2  -25 12 57  123 55 50  -26 16  5  116  5 33  -24 23 48

    121 30  3   -27 11 48   15 34 54    23   121   -68  122 44 46  -27 25 55  120 12 30  -26 55 16  125  2 50  -27 47 25  117 32 18  -26 14 52
    122 37 17   -28 45 12   15 35  5    25   120   -66  123 49 58  -28 56 59  121 22 12  -28 31 19  126  4 56  -29 14 43  118 48 26  -27 57 25
    123 39  8   -30 14 12   15 35 17    26   120   -65  124 50 19  -30 24  6  122 25 50  -30  2 28  127  3  3  -30 38 40  119 56 39  -29 33 40
    124 36 35   -31 39 38   15 35 29    28   119   -64  125 46 41  -31 47 56  123 24 34  -31 29 41  127 57 47  -31 59 48  120 58 43  -31  5  0
    125 30 21   -33  2  3   15 35 41    29   118   -63  126 39 41  -33  8 59  124 19 16  -32 53 37  128 49 40  -33 18 31  121 55 48  -32 32 21

    126 20 59   -34 21 56   15 35 53    30   117   -61  127 29 48  -34 27 40  125 10 32  -34 14 48  129 39  4  -34 35  9  122 48 45  -33 56 27
    127  8 54   -35 39 38   15 36  4    31   116   -60  128 17 26  -35 44 19  125 58 51  -35 33 37  130 26 18  -35 49 57  123 38 12  -35 17 48
    127 54 28   -36 55 25   15 36 16    33   115   -59  129  2 51  -36 59 10  126 44 37  -36 50 25  131 11 39  -37  3  8  124 24 37  -36 36 48
Uncertainty in time = +/- 16 secs

Prediction of 2009 Mar 19.0

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