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ASTROMETRIC UPDATE:
OCCULTATION BY (304) OLGA - 2008 Aug 23

[Detailed Finder Charts]


Updated:   2008 JUL 25, 04:56 UT

Event Rank : 92

(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.

Olga Update Map


On 2008 Aug 23 UT, the 68 km diameter asteroid (304) Olga will occult a 12.8 mag star in the constellation Cetus for observers along a path across Western Australia beginning near Broome and ending over the Nullarbor.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 12.7 mag (the magnitude of the asteroid) for at most 8.2 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 19 34   -38  0  0   17 23 35    47    30   -51  130 50 37  131 48 26  130 22  9  132 16 37
    130 58 19   -37  0  0   17 23 22    48    31   -52  130 29 41  131 26 51  130  1 31  131 54 44
    130 36 44   -36  0  0   17 23  9    49    33   -53  130  8 24  131  4 59  129 40 31  131 32 35
    130 14 50   -35  0  0   17 22 56    49    34   -54  129 46 46  130 42 48  129 19 10  131 10  8
    129 52 36   -34  0  0   17 22 43    50    35   -54  129 24 47  130 20 19  128 57 26  130 47 23

    129 30  1   -33  0  0   17 22 30    51    36   -55  129  2 26  129 57 29  128 35 19  130 24 20
    129  7  4   -32  0  0   17 22 16    51    38   -56  128 39 43  129 34 19  128 12 49  130  0 57
    128 43 45   -31  0  0   17 22  3    52    39   -57  128 16 36  129 10 48  127 49 54  129 37 14
    128 20  4   -30  0  0   17 21 49    52    40   -58  127 53  6  128 46 56  127 26 35  129 13 10
    127 55 58   -29  0  0   17 21 35    53    42   -59  127 29 11  128 22 40  127  2 50  128 48 44

    127 31 29   -28  0  0   17 21 21    53    43   -59  127  4 51  127 58  1  126 38 39  128 23 56
    127  6 33   -27  0  0   17 21  7    54    45   -60  126 40  4  127 32 57  126 14  0  127 58 43
    126 41 12   -26  0  0   17 20 52    54    47   -61  126 14 50  127  7 28  125 48 53  127 33  7
    126 15 23   -25  0  0   17 20 38    54    48   -62  125 49  7  126 41 32  125 23 17  127  7  4
    125 49  5   -24  0  0   17 20 23    55    50   -63  125 22 56  126 15  9  124 57 11  126 40 35

    125 22 18   -23  0  0   17 20  9    55    52   -64  124 56 13  125 48 17  124 30 33  126 13 38
    124 55  0   -22  0  0   17 19 54    55    53   -64  124 28 59  125 20 55  124  3 23  125 46 12
    124 27 10   -21  0  0   17 19 39    55    55   -65  124  1 12  124 53  1  123 35 39  125 18 15
    123 58 46   -20  0  0   17 19 24    55    57   -66  123 32 51  124 24 35  123  7 20  124 49 47
    123 29 48   -19  0  0   17 19  9    56    59   -67  123  3 54  123 55 35  122 38 23  124 20 46

    123  0 13   -18  0  0   17 18 53    56    61   -68  122 34 19  123 26  0  122  8 49  123 51  9
    122 30  0   -17  0  0   17 18 38    56    62   -68  122  4  5  122 55 47  121 38 35  123 20 57
    121 59  7   -16  0  0   17 18 23    56    64   -69  121 33 11  122 24 56  121  7 39  122 50  6
    121 27 33   -15  0  0   17 18  7    55    66   -70  121  1 34  121 53 23  120 36  0  122 18 36
    120 55 14   -14  0  0   17 17 52    55    68   -70  120 29 13  121 21  8  120  3 35  121 46 24


Uncertainty in time = +/- 4 secs

[Prediction of 2008 Jul 25.0]

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