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ASTROMETRIC UPDATE:
OCCULTATION BY (100) HEKATE - 2015 Aug 22

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2015 JUL 17, 17:36 UT

Event Rank : 75

(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.

Hekate Update Map


On 2015 Aug 22 UT, the 89 km diameter asteroid (100) Hekate will occult a 10.0 mag star in the constellation Capricornus for observers along a path beginning near Cooktown in Queensland. The path moves south-west through central Australia, passing near Alice Springs. Then in Western Australia passes near Norseman and Albany.

In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 11.3 mag (the magnitude of the asteroid) for at most 11.7 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  '  "
                                                         Latitude   Latitude   Latitude   Latitude
    109  0  0   -40 30  0   17  2 49    60   305   -61  -39 54 12  -41  6  5  -39  1  0  -42  0 47
    110  0  0   -39 51 27   17  2 35    60   303   -62  -39 15 38  -40 27 33  -38 22 25  -41 22 17
    111  0  0   -39 12 28   17  2 20    59   301   -62  -38 36 38  -39 48 36  -37 43 24  -40 43 20
    112  0  0   -38 33  5   17  2  6    59   298   -63  -37 57 15  -39  9 13  -37  4  1  -40  3 58
    113  0  0   -37 53 19   17  1 52    59   296   -63  -37 17 29  -38 29 26  -36 24 14  -39 24 11

    114  0  0   -37 13 10   17  1 37    58   294   -63  -36 37 20  -37 49 17  -35 44  7  -38 44  1
    115  0  0   -36 32 40   17  1 23    58   292   -64  -35 56 51  -37  8 46  -35  3 39  -38  3 28
    116  0  0   -35 51 50   17  1  8    57   290   -64  -35 16  3  -36 27 55  -34 22 53  -37 22 35
    117  0  0   -35 10 42   17  0 54    57   288   -64  -34 34 56  -35 46 45  -33 41 48  -36 41 22
    118  0  0   -34 29 16   17  0 39    56   286   -65  -33 53 33  -35  5 17  -33  0 28  -35 59 51

    119  0  0   -33 47 35   17  0 25    56   285   -65  -33 11 54  -34 23 33  -32 18 52  -35 18  3
    120  0  0   -33  5 39   17  0 10    55   283   -65  -32 30  0  -33 41 34  -31 37  3  -34 35 59
    121  0  0   -32 23 29   16 59 56    55   281   -65  -31 47 54  -32 59 21  -30 55  1  -33 53 41
    122  0  0   -31 41  8   16 59 41    54   279   -65  -31  5 37  -32 16 56  -30 12 49  -33 11 11
    123  0  0   -30 58 37   16 59 26    53   278   -65  -30 23  9  -31 34 21  -29 30 27  -32 28 29

    124  0  0   -30 15 57   16 59 12    53   276   -65  -29 40 33  -30 51 37  -28 47 57  -31 45 38
    125  0  0   -29 33 10   16 58 58    52   275   -65  -28 57 51  -30  8 45  -28  5 21  -31  2 39
    126  0  0   -28 50 17   16 58 43    51   273   -65  -28 15  2  -29 25 47  -27 22 40  -30 19 33
    127  0  0   -28  7 19   16 58 29    50   272   -64  -27 32 10  -28 42 44  -26 39 55  -29 36 22
    128  0  0   -27 24 20   16 58 15    49   271   -64  -26 49 16  -27 59 39  -25 57  8  -28 53  8

    129  0  0   -26 41 19   16 58  1    49   269   -64  -26  6 21  -27 16 32  -25 14 21  -28  9 52
    130  0  0   -25 58 18   16 57 47    48   268   -63  -25 23 26  -26 33 25  -24 31 35  -27 26 36
    131  0  0   -25 15 19   16 57 33    47   267   -63  -24 40 33  -25 50 20  -23 48 52  -26 43 21
    132  0  0   -24 32 24   16 57 19    46   266   -63  -23 57 45  -25  7 19  -23  6 12  -26  0  9
    133  0  0   -23 49 34   16 57  6    45   265   -62  -23 15  1  -24 24 22  -22 23 38  -25 17  2

    134  0  0   -23  6 50   16 56 53    44   264   -61  -22 32 24  -23 41 31  -21 41 12  -24 34  0
    135  0  0   -22 24 15   16 56 40    43   263   -61  -21 49 56  -22 58 48  -20 58 53  -23 51  6
    136  0  0   -21 41 49   16 56 27    42   262   -60  -21  7 37  -22 16 15  -20 16 45  -23  8 21
    137  0  0   -20 59 33   16 56 14    41   261   -60  -20 25 29  -21 33 52  -19 34 48  -22 25 47
    138  0  0   -20 17 31   16 56  2    40   260   -59  -19 43 34  -20 51 41  -18 53  3  -21 43 25

    139  0  0   -19 35 42   16 55 50    39   260   -58  -19  1 53  -20  9 45  -18 11 33  -21  1 16
    140  0  0   -18 54  8   16 55 38    38   259   -57  -18 20 27  -19 28  3  -17 30 19  -20 19 21
    141  0  0   -18 12 51   16 55 26    37   258   -56  -17 39 17  -18 46 38  -16 49 21  -19 37 44
    142  0  0   -17 31 51   16 55 14    36   258   -56  -16 58 26  -18  5 30  -16  8 41  -18 56 23
    143  0  0   -16 51 11   16 55  3    35   257   -55  -16 17 54  -17 24 41  -15 28 21  -18 15 22

    144  0  0   -16 10 51   16 54 52    34   256   -54  -15 37 42  -16 44 13  -14 48 21  -17 34 41
    145  0  0   -15 30 53   16 54 42    33   256   -53  -14 57 52  -16  4  7  -14  8 43  -16 54 21
    146  0  0   -14 51 18   16 54 32    32   255   -52  -14 18 25  -15 24 23  -13 29 29  -16 14 25
    147  0  0   -14 12  7   16 54 22    31   255   -51  -13 39 22  -14 45  3  -12 50 38  -15 34 52
    148  0  0   -13 33 21   16 54 12    30   254   -50  -13  0 45  -14  6  8  -12 12 12  -14 55 44

    149  0  0   -12 55  1   16 54  2    29   254   -49  -12 22 33  -13 27 40  -11 34 13  -14 17  2
    150  0  0   -12 17  8   16 53 53    28   254   -48  -11 44 49  -12 49 38  -10 56 41  -13 38 47
    151  0  0   -11 39 43   16 53 45    27   253   -47  -11  7 33  -12 12  5  -10 19 37  -13  1  1
    152  0  0   -11  2 48   16 53 36    26   253   -46  -10 30 46  -11 35  1  - 9 43  3  -12 23 44
    153  0  0   -10 26 23   16 53 28    25   253   -45  - 9 54 29  -10 58 28  - 9  6 58  -11 46 57

Uncertainty in time = +/- 9 secs

Prediction of 2015 Jul 18.0

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