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ASTROMETRIC UPDATE:
OCCULTATION BY (132) AETHRA - 2012 APR 15

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2012 Feb 24, 10:00 UT

Event Rank : 46

(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.

Aethra Update Map


On 2012 Apr 15 UT, the 45 km diameter asteroid (132) Aethra will occult a 11.7 mag star in the constellation Lupus for observers along a path across Tasmania, eastern Victoria, central New South Wales and western Queensland, passing over Hobart, Launceston, Traralgon and Benalla and near Melbourne.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 12.0 mag (the magnitude of the asteroid) for at most 6.3 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 :
 Occultation of UCAC2 11583294 by 132 Aethra on 2012 Apr 15 
                   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
    147 19 39   -44 26 44   11 58 44    47   117   -45  146 57 35  -44 23 22  147 41 39  -44 30  0  145 55 36  -44 13 24  148 43  2  -44 38 36
    147 15  5   -43 16 29   11 59  2    46   118   -46  146 53 22  -43 13  5  147 36 44  -43 19 47  145 52 20  -43  3  1  148 37  8  -43 28 28
    147  8 54   -42  5 34   11 59 19    46   119   -47  146 47 31  -42  2  8  147 30 14  -42  8 54  145 47 22  -41 51 57  148 29 43  -42 17 42
    147  1  8   -40 53 57   11 59 37    45   120   -48  146 40  2  -40 50 28  147 22 10  -40 57 20  145 40 43  -40 40  8  148 20 48  -41  6 17
    146 51 48   -39 41 34   11 59 54    45   121   -48  146 31  0  -39 38  1  147 12 34  -39 45  0  145 32 26  -39 27 31  148 10 25  -39 54  7

    146 40 57   -38 28 21   12  0 12    44   122   -49  146 20 24  -38 24 43  147  1 28  -38 31 52  145 22 31  -38 14  1  147 58 36  -38 41 11
    146 28 35   -37 14 14   12  0 29    43   123   -49  146  8 14  -37 10 31  146 48 51  -37 17 50  145 10 59  -36 59 34  147 45 21  -37 27 23
    146 14 40   -35 59  8   12  0 46    42   124   -50  145 54 32  -35 55 19  146 34 44  -36  2 50  144 57 50  -35 44  5  147 30 39  -36 12 38
    145 59 12   -34 42 58   12  1  4    41   125   -51  145 39 15  -34 39  3  146 19  6  -34 46 47  144 43  2  -34 27 29  147 14 29  -34 56 53
    145 42 10   -33 25 38   12  1 21    41   126   -51  145 22 22  -33 21 35  146  1 54  -33 29 34  144 26 34  -33  9 39  146 56 50  -33 40  2

    145 23 31   -32  7  1   12  1 39    40   127   -51  145  3 50  -32  2 50  145 43  7  -32 11  6  144  8 23  -31 50 28  146 37 40  -32 21 57
    145  3 10   -30 47  0   12  1 56    39   128   -52  144 43 35  -30 42 39  145 22 40  -30 51 15  143 48 24  -30 29 48  146 16 54  -31  2 32
    144 41  3   -29 25 26   12  2 14    38   129   -52  144 21 33  -29 20 53  145  0 29  -29 29 52  143 26 32  -29  7 29  145 54 29  -29 41 38
    144 17  5   -28  2  8   12  2 31    36   130   -52  143 57 37  -27 57 22  144 36 28  -28  6 46  143  2 41  -27 43 20  145 30 19  -28 19  7
    143 51  7   -26 36 54   12  2 48    35   130   -53  143 31 40  -26 31 54  144 10 29  -26 41 47  142 36 43  -26 17  9  145  4 17  -26 54 46

    143 23  0   -25  9 31   12  3  6    34   131   -53  143  3 30  -25  4 13  143 42 24  -25 14 40  142  8 25  -24 48 39  144 36 14  -25 28 23
    142 52 31   -23 39 41   12  3 23    33   132   -53  142 32 57  -23 34  4  143 11 59  -23 45  9  141 37 35  -23 17 31  144  6  0  -23 59 43
    142 19 25   -22  7  3   12  3 41    31   133   -53  141 59 43  -22  1  3  142 39  1  -22 12 53  141  3 55  -21 43 24  143 33 19  -22 28 26
    141 43 22   -20 31 13   12  3 58    30   133   -53  141 23 28  -20 24 46  142  3 10  -20 37 29  140 27  2  -20  5 47  142 57 56  -20 54 10
    141  3 57   -18 51 37   12  4 16    28   134   -52  140 43 46  -18 44 38  141 24  1  -18 58 24  139 46 26  -18 24  3  142 19 28  -19 16 27

    140 20 36   -17  7 34   12  4 33    27   135   -52  140  0  0  -16 59 56  140 41  1  -17 14 59  139  1 27  -16 37 23  141 37 25  -17 34 40
    139 32 31   -15 18  8   12  4 50    25   135   -51  139 11 23  -15  9 42  139 53 27  -15 26 19  138 11  9  -14 44 41  140 51  8  -15 48  1
    138 38 37   -13 22  1   12  5  8    23   136   -51  138 16 44  -13 12 32  139  0 16  -13 31 11  137 14  9  -12 44 21  139 59 43  -13 55 26
    137 37 16   -11 17 18   12  5 25    21   136   -50  137 14 19  -11  6 26  137 59 54  -11 27 47  136  8 19  -10 33 54  139  1 52  -11 55 22
Uncertainty in time = +/- 10 secs

Prediction of 2012 Feb 24.0


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