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ASTROMETRIC UPDATE:
OCCULTATION BY (678) FREDEGUNDIS - 2015 Nov 30

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2015 OCT 02, 22:16 UT

Event Rank : 96

(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.

Fredegundis Update Map


On 2015 Nov 30 UT, the 42 km diameter asteroid (678) Fredegundis will occult a 12.4 mag star in the constellation Taurus for observers along a path beginning near St Lawrence in Queensland. The path moves south-west passing near Emerald, and then into SA near Streaky Bay.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.3 mag to 11.0 mag (the magnitude of the asteroid) for at most 5.4 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, 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
    133 48 56   -34  0  0   14 24 55    28     3   -34  133 19 30  134 18 33  132 55 30  134 43  0
    134 58  1   -33  0  0   14 24 41    29     2   -35  134 28 27  135 27 48  134  4 21  135 52 23
    136  8 51   -32  0  0   14 24 26    30     1   -36  135 39  6  136 38 50  135 14 52  137  3 34
    137 21 34   -31  0  0   14 24 10    31   360   -37  136 51 35  137 51 47  136 27 10  138 16 44
    138 36 18   -30  0  0   14 23 53    32   359   -38  138  6  2  139  6 48  137 41 24  139 32  0

    139 53 14   -29  0  0   14 23 36    33   357   -39  139 22 38  140 24  5  138 57 44  140 49 35
    141 12 33   -28  0  0   14 23 18    34   356   -40  140 41 34  141 43 50  140 16 21  142  9 41
    142 34 30   -27  0  0   14 22 59    35   354   -41  142  3  3  143  6 16  141 37 28  143 32 32
    143 59 19   -26  0  0   14 22 39    36   353   -42  143 27 19  144 31 39  143  1 18  144 58 25
    145 27 19   -25  0  0   14 22 18    37   351   -43  144 54 40  146  0 19  144 28 10  146 27 39

    146 58 50   -24  0  0   14 21 56    38   350   -44  146 25 27  147 32 37  145 58 21  148  0 38
    148 34 19   -23  0  0   14 21 33    38   348   -45  148  0  3  149  9  1  147 32 16  149 37 49
    150 14 15   -22  0  0   14 21  9    39   346   -46  149 38 58  150 50  3  149 10 22  151 19 46
    151 59 18   -21  0  0   14 20 43    39   344   -46  151 22 46  152 36 22  150 53 13  153  7 13
    153 50 13   -20  0  0   14 20 16    40   342   -47  153 12 14  154 28 51  152 41 32  155  1  2

    155 48  4   -19  0  0   14 19 48    40   340   -47  155  8 17  156 28 36  154 36 12  157  2 26
    157 54 11   -18  0  0   14 19 17    40   337   -48  157 12 12  158 37  6  156 38 25  159 13  1


Uncertainty in time = +/- 4 secs

Prediction of 2015 Oct  2.0

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