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ASTROMETRIC UPDATE:
OCCULTATION BY (52) EUROPA - 2012 Aug 09

[Detailed Finder Charts]


Updated:   2012 JUL 07, 23:01 UT

Event Rank : 99

(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.

Europa Update Map


On 2012 Aug 09 UT, the 352 km diameter asteroid (52) Europa will occult a 12.9 mag star in the constellation Ophiuchus for observers along a wide path running down western WA from Exmouth to near Hopetoun on the south coast. Perth is inside the 1-sigma uncertainty area.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.4 mag to 12.0 mag (the magnitude of the asteroid) for at most 90.5 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
    112 52 25   -16  0  0   13 50  1    67   264   -51  111  3 57  114 42 35  109 55 21  115 54  5
    113  6 22   -17  0  0   13 50 30    67   266   -51  111 17  2  114 57 29  110  7 53  116  9 37
    113 21  6   -18  0  0   13 51  0    67   268   -51  111 30 48  115 13 12  110 21  5  116 26  1
    113 36 37   -19  0  0   13 51 31    66   270   -52  111 45 19  115 29 48  110 34 59  116 43 21
    113 52 59   -20  0  0   13 52  1    66   272   -52  112  0 37  115 47 18  110 49 37  117  1 38

    114 10 13   -21  0  0   13 52 31    66   274   -53  112 16 43  116  5 47  111  5  1  117 20 56
    114 28 24   -22  0  0   13 53  1    65   276   -53  112 33 40  116 25 15  111 21 14  117 41 18
    114 47 32   -23  0  0   13 53 31    65   278   -53  112 51 30  116 45 48  111 38 17  118  2 47
    115  7 43   -24  0  0   13 54  1    64   280   -54  113 10 18  117  7 27  111 56 14  118 25 28
    115 28 58   -25  0  0   13 54 31    63   282   -54  113 30  4  117 30 18  112 15  8  118 49 23

    115 51 22   -26  0  0   13 55  1    63   283   -54  113 50 54  117 54 24  112 35  0  119 14 38
    116 14 59   -27  0  0   13 55 31    62   284   -55  114 12 50  118 19 49  112 55 55  119 41 18
    116 39 52   -28  0  0   13 56  1    61   286   -55  114 35 56  118 46 38  113 17 57  120  9 27
    117  6  7   -29  0  0   13 56 31    61   287   -55  115  0 17  119 14 57  113 41  9  120 39 11
    117 33 48   -30  0  0   13 57  1    60   288   -55  115 25 56  119 44 51  114  5 35  121 10 36

    118  3  2   -31  0  0   13 57 31    59   289   -55  115 52 59  120 16 27  114 31 19  121 43 50
    118 33 54   -32  0  0   13 58  1    58   290   -56  116 21 31  120 49 51  114 58 28  122 19  1
                                                         Latitude   Latitude   Latitude   Latitude
    119  0  0   -32 48 18   13 58 25    57   291   -56  -36 43 58  -28 28 44  -39  5 13  -25 25 37
    120  0  0   -34 31 41   13 59 16    56   292   -56  -38 14 16  -30 29 11  -40 28 33  -27 40 14
    121  0  0   -36  5 48   14  0  3    54   293   -56  -39 37  9  -32 17 34  -41 45 22  -29 40  7

    122  0  0   -37 31 59   14  0 45    53   293   -56  -40 53 34  -33 55 53  -42 56 26  -31 27 59
    123  0  0   -38 51 17   14  1 25    52   294   -56  -42  4 18  -35 25 39  -44  2 24  -33  5 50
    124  0  0   -40  4 34   14  2  1    50   294   -56  -43  9 59  -36 48  3  -45  3 49  -34 35 10
    125  0  0   -41 12 30   14  2 34    49   294   -56  -44 11  8  -38  4  1  -46  1  9  -35 57  9
    126  0  0   -42 15 41   14  3  5    48   294   -56  -45  8 14  -39 14 21  -46 54 46  -37 12 46

Uncertainty in time = +/- 29 secs

Prediction of 2012 Jul  8.0

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