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ASTROMETRIC UPDATE:
OCCULTATION BY (588) ACHILLES - 2016 Mar 09

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2015 OCT 04, 22:52 UT

Event Rank : 63

(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.

Achilles Update Map


On 2016 Mar 09 UT, the 133 km diameter asteroid (588) Achilles will occult a 9.4 mag star in the constellation Scorpius for observers along a fairly broad path across Australia, from Bairsndale across eastern Victoria, central New South Wales, south-western Queensland and into The Northern Territory at decreasing elevation. Hobart, Melbourne, Canberra and Sydney are all within, or very close to, the one sigma limit.

In the case of an occultation, the combined light of the asteroid and the star will drop by 7.5 mag to 16.9 mag (the magnitude of the asteroid) for at most 14.7 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 Limit1           Path Limit2           Error Limit1          Error Limit2
  E. Longitude    Latitude      U.T.    Alt   Az    Alt                                                                                       
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "
                                                         Longitude  Latitude   Longitude  Latitude   Longitude  Latitude   Longitude  Latitude
    133 27 12   -17 30  9   14 21 53     7   122   -65  136 31 43  -18 52 54  ... .. ..   .. .. ..  140 51 31  -20 28 12  ... .. ..   .. .. ..
    136  6 34   -19 55 22   14 22  3    10   121   -64  138 30 12  -20 50 50  133  3 49  -18 33 51  142 18 28  -22  4 27  ... .. ..   .. .. ..
    137 59 44   -21 50 21   14 22 14    13   120   -63  140  4 34  -22 32 57  135 34 57  -20 54 16  143 33 44  -23 33  1  126 49  3  -16 23 44
    139 30 35   -23 30 42   14 22 25    15   119   -61  141 24 16  -24  5 26  137 23 57  -22 47  6  144 40 31  -24 55 59  132  3 20  -20 32  0
    140 47 34   -25  1 57   14 22 36    17   119   -60  142 33 48  -25 31 14  138 51 51  -24 26  6  145 40 46  -26 14 40  134 22 25  -22 45 48

    141 54 49   -26 26 51   14 22 47    18   118   -59  143 35 46  -26 52  6  140  6 27  -25 56 24  146 35 47  -27 29 55  136  4 32  -24 35 22
    142 54 44   -27 47  0   14 22 58    20   117   -58  144 31 45  -28  9  6  141 11 38  -27 20 35  147 26 29  -28 42 22  137 27 15  -26 12 16
    143 48 53   -29  3 26   14 23  9    21   116   -57  145 22 55  -29 22 59  142  9 40  -28 40 10  148 13 31  -29 52 28  138 37 28  -27 41  1
    144 38 17   -30 16 50   14 23 19    22   116   -56  146 10  1  -30 34 18  143  2  3  -29 56  7  148 57 25  -31  0 34  139 38 43  -29  4  0
    145 23 43   -31 27 45   14 23 30    23   115   -54  146 53 39  -31 43 27  143 49 45  -31  9  8  149 38 33  -32  6 57  140 33  5  -30 22 36

    146  5 43   -32 36 33   14 23 41    24   114   -53  147 34 16  -32 50 44  144 33 32  -32 19 43  150 17 16  -33 11 50  141 21 56  -31 37 45
    146 44 44   -33 43 33   14 23 52    25   113   -52  148 12 13  -33 56 25  145 13 54  -33 28 14  150 53 47  -34 15 23  142  6 13  -32 50  5
    147 21  6   -34 48 59   14 24  3    26   113   -51  148 47 48  -35  0 42  145 51 18  -34 34 59  151 28 19  -35 17 47  142 46 37  -34  0  5
    147 55  4   -35 53  3   14 24 14    27   112   -50  149 21 12  -36  3 45  146 26  2  -35 40 13  152  1  3  -36 19  8  143 23 37  -35  8  5
    148 26 52   -36 55 55   14 24 25    28   111   -49  149 52 38  -37  5 42  146 58 21  -36 44  6  152 32  6  -37 19 34  143 57 36  -36 14 23

    148 56 40   -37 57 42   14 24 36    29   110   -48  150 22 14  -38  6 40  147 28 29  -37 46 48  153  1 36  -38 19  9  144 28 53  -37 19 13
    149 24 36   -38 58 33   14 24 46    30   110   -47  150 50  8  -39  6 46  147 56 34  -38 48 27  153 29 40  -39 18  0  144 57 42  -38 22 44
    149 50 48   -39 58 32   14 24 57    30   109   -46  151 16 26  -40  6  6  148 22 46  -39 49 10  153 56 21  -40 16 10  145 24 15  -39 25  7
    150 15 22   -40 57 45   14 25  8    31   108   -45  151 41 13  -41  4 43  148 47 10  -40 49  3  154 21 44  -41 13 44  145 48 39  -40 26 29
    150 38 21   -41 56 17   14 25 19    31   107   -44  152  4 33  -42  2 41  149  9 52  -41 48 10  154 45 53  -42 10 44  146 11  2  -41 26 56

    150 59 50   -42 54 11   14 25 30    32   106   -43  152 26 30  -43  0  5  149 30 56  -42 46 37  155  8 50  -43  7 15  146 31 30  -42 26 34
    151 19 51   -43 51 32   14 25 41    33   106   -42  152 47  6  -43 56 59  149 50 25  -43 44 27  155 30 38  -44  3 19  146 50  8  -43 25 28
    151 38 27   -44 48 22   14 25 52    33   105   -41  153  6 23  -44 53 23  150  8 22  -44 41 44  155 51 18  -44 58 58  147  6 57  -44 23 43
    151 55 39   -45 44 45   14 26  2    34   104   -40  153 24 23  -45 49 23  150 24 49  -45 38 30  156 10 53  -45 54 15  147 22  1  -45 21 21

Uncertainty in time = +/- 16 secs

Prediction of 2016 Feb 16.0

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