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ASTROMETRIC UPDATE:
OCCULTATION BY (1732) HEIKE - 2013 Dec 20

[Detailed Finder Charts]


Updated:   2013 NOV 22, 16:57 UT

Event Rank : 22

(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.

Heike Update Map


On 2013 Dec 20 UT, the 24 km diameter asteroid (1732) Heike will occult a 9.8 mag star in the constellation Aquarius for observers along a path slightly south of south-western Western Australia at low elevation.

In the case of an occultation, the combined light of the asteroid and the star will drop by 6.7 mag to 16.5 mag (the magnitude of the asteroid) for at most 0.9 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
    133 31 21   -33  0  0   14 20 10     3   258   -33  134 18 34  132 45 27  ... .. ..  ... .. ..
    129 35 11   -34  0  0   14 20  9     6   260   -31  130 16 55  128 54 19  134 57 46  124 58 46
                                                         Latitude   Latitude   Latitude   Latitude
    128  0  0   -34 26 24   14 20  7     7   261   -30  -34 37 39  -34 15 11  -35 48 11  -33  7 10
    127  0  0   -34 43 40   14 20  7     8   261   -30  -34 54 59  -34 32 25  -36  5 45  -33 24 11
    126  0  0   -35  1 26   14 20  6     9   262   -29  -35 12 47  -34 50  9  -36 23 49  -33 41 40

    125  0  0   -35 19 41   14 20  5    10   263   -29  -35 31  4  -35  8 21  -36 42 23  -33 59 38
    124  0  0   -35 38 24   14 20  4    11   263   -28  -35 49 50  -35 27  2  -37  1 25  -34 18  3
    123  0  0   -35 57 35   14 20  3    12   264   -27  -36  9  4  -35 46 10  -37 20 56  -34 36 57
    122  0  0   -36 17 14   14 20  1    13   265   -27  -36 28 45  -36  5 47  -37 40 55  -34 56 18
    121  0  0   -36 37 20   14 20  0    13   265   -26  -36 48 54  -36 25 50  -38  1 21  -35 16  5

    120  0  0   -36 57 53   14 19 59    14   266   -25  -37  9 29  -36 46 20  -38 22 15  -35 36 19
    119  0  0   -37 18 52   14 19 57    15   267   -25  -37 30 31  -37  7 16  -38 43 35  -35 56 59
    118  0  0   -37 40 16   14 19 56    16   267   -24  -37 51 58  -37 28 38  -39  5 21  -36 18  4
    117  0  0   -38  2  6   14 19 54    17   268   -23  -38 13 51  -37 50 24  -39 27 33  -36 39 34
    116  0  0   -38 24 20   14 19 52    17   269   -23  -38 36  8  -38 12 36  -39 50  9  -37  1 28

    115  0  0   -38 46 58   14 19 51    18   269   -22  -38 58 49  -38 35 11  -40 13 10  -37 23 46
    114  0  0   -39 10  0   14 19 49    19   270   -21  -39 21 54  -38 58  9  -40 36 34  -37 46 26
    113  0  0   -39 33 24   14 19 47    20   271   -21  -39 45 21  -39 21 30  -41  0 21  -38  9 30
    112  0  0   -39 57 10   14 19 45    21   272   -20  -40  9 10  -39 45 13  -41 24 31  -38 32 55
    111  0  0   -40 21 17   14 19 43    21   273   -19  -40 33 21  -40  9 18  -41 49  2  -38 56 41

    110  0  0   -40 45 45   14 19 41    22   273   -18  -40 57 52  -40 33 42  -42 13 53  -39 20 47
    109  0  0   -41 10 33   14 19 38    23   274   -18  -41 22 43  -40 58 27  -42 39  5  -39 45 14

Uncertainty in time = +/- 4 secs

Prediction of 2013 Nov 23.0

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