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ASTROMETRIC UPDATE:
OCCULTATION BY (624) HEKTOR - 2010 OCT 08

[Detailed Finder Charts]


Updated:   2010 OCT 03, 19:08 UT

Event Rank : 87

(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.

Hektor Update Map


On 2010 Oct 08 UT, the 181 km diameter asteroid (624) Hektor will occult a 11.5 mag star in the constellation Auriga for observers along a wide, significant uncertainty path across Queensland, western New South Wales and very low in the north over western Victoria.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.7 mag to 15.2 mag (the magnitude of the asteroid) for at most 19.4 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
    141  4 36   -38  0  0   16 57  0     3    26   -33  142 13 21  139 55 23  143 31 10  138 35 50
    141 41 15   -37  0  0   16 57  1     4    26   -34  142 48 50  140 33 12  144  5 23  139 15  2
    142 16 43   -36  0  0   16 57  2     5    26   -34  143 23 14  141  9 47  144 38 34  139 52 56
    142 51  6   -35  0  0   16 57  3     6    25   -34  143 56 35  141 45 13  145 10 48  140 29 35
    143 24 28   -34  0  0   16 57  4     7    25   -35  144 28 59  142 19 34  145 42  8  141  5  6

    143 56 52   -33  0  0   16 57  6     8    25   -35  145  0 29  142 52 54  146 12 36  141 39 32
    144 28 22   -32  0  0   16 57  8     9    24   -35  145 31  7  143 25 17  146 42 17  142 12 57
    144 59  1   -31  0  0   16 57 10    10    24   -35  146  0 57  143 56 47  147 11 12  142 45 25
    145 28 52   -30  0  0   16 57 12    11    24   -35  146 30  2  144 27 25  147 39 26  143 16 58
    145 57 58   -29  0  0   16 57 15    12    24   -36  146 58 24  144 57 16  148  6 59  143 47 41

    146 26 21   -28  0  0   16 57 18    14    23   -36  147 26  6  145 26 21  148 33 54  144 17 37
    146 54  5   -27  0  0   16 57 21    15    23   -36  147 53 10  145 54 45  149  0 15  144 46 47
    147 21 10   -26  0  0   16 57 24    16    23   -36  148 19 38  146 22 28  149 26  1  145 15 14
    147 47 39   -25  0  0   16 57 28    17    23   -36  148 45 32  146 49 33  149 51 17  145 43  1
    148 13 35   -24  0  0   16 57 32    18    23   -36  149 10 55  147 16  2  150 16  2  146 10 10

    148 38 58   -23  0  0   16 57 36    19    22   -36  149 35 47  147 41 58  150 40 20  146 36 43
    149  3 52   -22  0  0   16 57 40    20    22   -36  150  0 11  148  7 22  151  4 11  147  2 41
    149 28 17   -21  0  0   16 57 44    21    22   -37  150 24  8  148 32 15  151 27 37  147 28  8
    149 52 16   -20  0  0   16 57 49    22    22   -37  150 47 41  148 56 40  151 50 40  147 53  4
    150 15 49   -19  0  0   16 57 54    23    22   -37  151 10 49  149 20 38  152 13 21  148 17 32

    150 38 58   -18  0  0   16 57 59    24    22   -37  151 33 35  149 44 11  152 35 41  148 41 32
Uncertainty in time = +/- 12 secs

Prediction of 2010 Oct  4.0

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