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ASTROMETRIC UPDATE:
OCCULTATION BY (4460) BIHORO - 2008 OCT 10

[Detailed Finder Charts]


Updated:   2008 SEP 11, 16:16 UT

Event Rank : 15

(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.

Bihoro Update Map


On 2008 Oct 10 UT, the 40 km diameter asteroid (4460) Bihoro will occult a 10.4 mag star in the constellation Auriga for observers along a large uncertainty path across eastern Northern Territory and north-western Queensland, low in the north.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 16.1 mag (the magnitude of the asteroid) for at most 3.2 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: .

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
    133 49 41   -27  0  0   17 53 35     3    21   -34  134  3 14  133 36  9  136  8 37  ... .. ..
    134 16 39   -26  0  0   17 53 36     4    21   -35  134 30  5  134  3 14  136 34 30  ... .. ..
    134 43 32   -25  0  0   17 53 37     5    21   -35  134 56 52  134 30 12  137  0 21  ... .. ..
    135 10 20   -24  0  0   17 53 38     6    21   -35  135 23 34  134 57  6  137 26 12  132 55  4
    135 37  5   -23  0  0   17 53 39     8    20   -35  135 50 14  135 23 56  137 52  3  133 22 44

    136  3 47   -22  0  0   17 53 40     9    20   -35  136 16 51  135 50 44  138 17 56  133 50 19
    136 30 29   -21  0  0   17 53 42    10    20   -35  136 43 28  136 17 30  138 43 52  134 17 48
    136 57 11   -20  0  0   17 53 44    11    20   -35  137 10  6  136 44 16  139  9 51  134 45 15
    137 23 54   -19  0  0   17 53 46    12    20   -35  137 36 45  137 11  3  139 35 55  135 12 39
    137 50 39   -18  0  0   17 53 48    13    20   -35  138  3 27  137 37 52  140  2  5  135 40  2

    138 17 28   -17  0  0   17 53 50    14    19   -35  138 30 12  138  4 44  140 28 21  136  7 24
    138 44 21   -16  0  0   17 53 53    15    19   -35  138 57  2  138 31 39  140 54 45  136 34 48
    139 11 19   -15  0  0   17 53 55    16    19   -35  139 23 58  138 58 40  141 21 18  137  2 15
    139 38 24   -14  0  0   17 53 58    17    19   -35  139 51  0  139 25 48  141 48  0  137 29 44
    140  5 36   -13  0  0   17 54  2    18    19   -35  140 18 11  139 53  2  142 14 53  137 57 18

    140 32 57   -12  0  0   17 54  5    19    19   -35  140 45 31  140 20 25  142 41 59  138 24 57
    141  0 28   -11  0  0   17 54  8    21    18   -34  141 13  0  140 47 57  143  9 17  138 52 43
    141 28 10   -10  0  0   17 54 12    22    18   -34  141 40 41  141 15 40  143 36 49  139 20 37
Uncertainty in time = +/- 17 secs

[Prediction of 2008 Sep 11.0]

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