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ASTROMETRIC UPDATE:
OCCULTATION BY (516) AMHERSTIA - 2016 Jun 23

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2016 APR 26, 14:13 UT

Event Rank : 67

(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.

Amherstia Update Map


On 2016 Jun 23 UT, the 66 km diameter asteroid (516) Amherstia will occult a 12.4 mag star in the constellation Norma for observers along a path across western South Australia and north-eastern Western Australia to near Derby.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.24 mag to 10.90 mag (the magnitude of the asteroid) for at most 11.0 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, astrometry for the asteroid kindly provided by the IAU Minor Planet Center.

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       Alt
  E. Longitude   Latitude      U.T.    Alt    Az   Alt    Limit 1    Limit 2    Limit 3    Limit 4   Crn
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
                                                        Longitude  Longitude  Longitude  Longitude
    123 35 10   -14  0  0   13 27 50    60   178   -56  123 54 42  123 15 40  124 24  3  122 46 28  -0.16

    123 55 17   -15  0  0   13 27 34    61   179   -56  124 14 55  123 35 40  124 44 25  123  6 18  -0.16
    124 15 44   -16  0  0   13 27 17    62   179   -57  124 35 29  123 56  1  125  5 10  123 26 29  -0.16
    124 36 34   -17  0  0   13 27  0    63   179   -57  124 56 26  124 16 43  125 26 18  123 47  0  -0.16
    124 57 46   -18  0  0   13 26 42    64   180   -58  125 17 46  124 37 47  125 47 50  124  7 53  -0.15
    125 19 22   -19  0  0   13 26 25    65   180   -58  125 39 31  124 59 15  126  9 47  124 29  8  -0.15

    125 41 23   -20  0  0   13 26  8    66   181   -59  126  1 41  125 21  7  126 32 11  124 50 47  -0.15
    126  3 50   -21  0  0   13 25 50    67   182   -59  126 24 17  125 43 25  126 55  1  125 12 50  -0.15
    126 26 44   -22  0  0   13 25 32    68   182   -60  126 47 21  126  6  9  127 18 20  125 35 19  -0.15
    126 50  6   -23  0  0   13 25 14    69   183   -60  127 10 54  126 29 20  127 42  9  125 58 15  -0.15
    127 13 58   -24  0  0   13 24 56    70   184   -61  127 34 57  126 53  1  128  6 29  126 21 39  -0.15

    127 38 21   -25  0  0   13 24 37    71   185   -61  127 59 31  127 17 12  128 31 22  126 45 33  -0.15
    128  3 16   -26  0  0   13 24 19    72   186   -61  128 24 39  127 41 55  128 56 49  127  9 57  -0.15
    128 28 45   -27  0  0   13 24  0    73   187   -62  128 50 22  128  7 11  129 22 52  127 34 54  -0.14
    128 54 51   -28  0  0   13 23 42    74   188   -62  129 16 41  128 33  2  129 49 32  128  0 25  -0.14
    129 21 34   -29  0  0   13 23 23    75   190   -62  129 43 39  128 59 31  130 16 52  128 26 31  -0.14

    129 48 56   -30  0  0   13 23  4    76   191   -62  130 11 17  129 26 38  130 44 54  128 53 15  -0.14
    130 17  0   -31  0  0   13 22 45    76   193   -63  130 39 38  129 54 26  131 13 40  129 20 39  -0.14
    130 45 49   -32  0  0   13 22 26    77   196   -63  131  8 44  130 22 57  131 43 12  129 48 44  -0.14
    131 15 24   -33  0  0   13 22  6    78   199   -63  131 38 37  130 52 13  132 13 33  130 17 34  -0.14
    131 45 48   -34  0  0   13 21 47    79   202   -63  132  9 20  131 22 18  132 44 46  130 47 10  -0.14

                                                         Latitude   Latitude   Latitude   Latitude
    132  0  0   -34 27 28   13 21 38    79   203   -63  -33 41 56  -35 12 54  -32 33 25  -36 20 53  -0.14
    133  0  0   -36 19 39   13 21  2    80   211   -63  -35 35 20  -37  3 53  -34 28 40  -38 10  5  -0.14
    134  0  0   -38  5 50   13 20 27    81   221   -63  -37 22 41  -38 48 55  -36 17 47  -39 53 24  -0.14
    135  0  0   -39 46 21   13 19 53    82   233   -63  -39  4 19  -40 28 19  -38  1  7  -41 31 11  -0.14
   - 81  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..  -42 19  1   ....

Uncertainty in time = +/- 9 secs

Prediction of 2016 Apr 26.0


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