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ASTROMETRIC UPDATE:
OCCULTATION BY (89) JULIA - 2009 Aug 03

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2009 JUN 25, 15:29 UT

Event Rank : 98

(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.

Julia Update Map


On 2009 Aug 03 UT, the 175 km diameter asteroid (89) Julia will occult a 11.7 mag star in the constellation Andromeda for observers along a south-to-north path across Austrlia from south-west South Australia to north-east Northern Territory.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.3 mag to 10.3 mag (the magnitude of the asteroid) for at most 13.4 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 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
    118 10 56   -48  0  0   17 47 51    13    34   -54  119 34 29  116 46 18  120 34  1  115 44 40
    119  7 49   -47  0  0   17 47 54    14    33   -54  120 29  8  117 45 32  121 27  6  116 45 38
    120  2  3   -46  0  0   17 47 56    15    32   -54  121 21 17  118 41 56  122 17 50  117 43 39
    120 53 52   -45  0  0   17 47 59    17    32   -55  122 11 11  119 35 45  123  6 22  118 38 57
    121 43 27   -44  0  0   17 48  2    18    31   -55  122 58 58  120 27 11  123 52 54  119 31 47

    122 30 58   -43  0  0   17 48  5    19    31   -55  123 44 49  121 16 27  124 37 35  120 22 20
    123 16 36   -42  0  0   17 48  8    20    30   -55  124 28 52  122  3 41  125 20 32  121 10 46
    124  0 27   -41  0  0   17 48 12    21    30   -55  125 11 16  122 49  4  126  1 54  121 57 16
    124 42 41   -40  0  0   17 48 15    22    29   -55  125 52  7  123 32 42  126 41 48  122 41 58
    125 23 24   -39  0  0   17 48 19    24    29   -55  126 31 32  124 14 45  127 20 18  123 24 59

    126  2 42   -38  0  0   17 48 23    25    28   -55  127  9 37  124 55 17  127 57 32  124  6 27
    126 40 40   -37  0  0   17 48 27    26    28   -55  127 46 27  125 34 27  128 33 34  124 46 28
    127 17 25   -36  0  0   17 48 31    27    28   -55  128 22  8  126 12 18  129  8 29  125 25  8
    127 53  1   -35  0  0   17 48 36    28    27   -55  128 56 43  126 48 56  129 42 21  126  2 32
    128 27 32   -34  0  0   17 48 40    29    27   -55  129 30 16  127 24 26  130 15 14  126 38 46

    129  1  3   -33  0  0   17 48 45    30    27   -55  130  2 53  127 58 52  130 47 13  127 13 53
    129 33 36   -32  0  0   17 48 50    31    26   -55  130 34 36  128 32 18  131 18 19  127 47 58
    130  5 17   -31  0  0   17 48 55    32    26   -55  131  5 28  129  4 48  131 48 37  128 21  4
    130 36  7   -30  0  0   17 49  0    34    26   -55  131 35 32  129 36 25  132 18  9  128 53 15
    131  6 11   -29  0  0   17 49  5    35    26   -54  132  4 52  130  7 13  132 46 59  129 24 35

    131 35 30   -28  0  0   17 49 10    36    25   -54  132 33 31  130 37 14  133 15  8  129 55  7
    132  4  7   -27  0  0   17 49 16    37    25   -54  133  1 29  131  6 30  133 42 40  130 24 52
    132 32  5   -26  0  0   17 49 21    38    25   -53  133 28 51  131 35  6  134  9 36  130 53 55
    132 59 26   -25  0  0   17 49 27    39    25   -53  133 55 38  132  3  2  134 35 58  131 22 17
    133 26 13   -24  0  0   17 49 33    40    25   -53  134 21 52  132 30 22  135  1 49  131 50  1

    133 52 26   -23  0  0   17 49 39    41    24   -52  134 47 35  132 57  7  135 27 11  132 17  9
    134 18  9   -22  0  0   17 49 45    42    24   -52  135 12 49  133 23 19  135 52  4  132 43 43
    134 43 23   -21  0  0   17 49 51    43    24   -52  135 37 36  133 49  1  136 16 32  133  9 45
    135  8 10   -20  0  0   17 49 57    44    24   -51  136  1 57  134 14 13  136 40 35  133 35 17
    135 32 31   -19  0  0   17 50  4    45    24   -51  136 25 53  134 38 59  137  4 15  134  0 21

    135 56 27   -18  0  0   17 50 10    47    24   -50  136 49 28  135  3 19  137 27 33  134 24 57
    136 20  2   -17  0  0   17 50 17    48    24   -50  137 12 41  135 27 15  137 50 31  134 49  9
    136 43 15   -16  0  0   17 50 24    49    24   -49  137 35 34  135 50 48  138 13 11  135 12 57
    137  6  8   -15  0  0   17 50 31    50    23   -49  137 58  9  136 14  0  138 35 33  135 36 23
    137 28 43   -14  0  0   17 50 38    51    23   -48  138 20 27  136 36 52  138 57 38  135 59 28

    137 51  0   -13  0  0   17 50 45    52    23   -47  138 42 28  136 59 25  139 19 29  136 22 13
    138 13  1   -12  0  0   17 50 52    53    23   -47  139  4 15  137 21 41  139 41  5  136 44 40
    138 34 47   -11  0  0   17 50 59    54    23   -46  139 25 48  137 43 41  140  2 29  137  6 50
    138 56 20   -10  0  0   17 51  7    55    23   -46  139 47  9  138  5 26  140 23 41  137 28 44
    139 17 40   - 9  0  0   17 51 14    56    23   -45  140  8 17  138 26 57  140 44 42  137 50 23

Uncertainty in time = +/- 5 secs

Prediction of 2009 Jun 25.0

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