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ASTROMETRIC UPDATE:
OCCULTATION BY (1208) TROILUS - 2005 APR 12

[Edwin Goffin's Prediction + Finder Charts]


Updated:   2005 MAR 16, 04:04 UT

Event Rank : 22

(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.

Troilus Update Map


On 2005 Apr 12 UT, the 103 km diameter asteroid (1208) Troilus will occult a 11.4 mag star in the constellation Ursa Major for observers along a path across Canada, Alaska, Australia.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 17.0 mag (the magnitude of the asteroid) for at most 6.6 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, 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
    ... .. ..   -36  0  0   .. .. ..    ..    ..    ..  ... .. ..  ... .. ..  ... .. ..  144 11 24
    140 19 27   -35  0  0    9 26 22     1    22   -15  139 42 29  140 56 21  ... .. ..  144 38 27
    140 49 19   -34  0  0    9 26 22     2    22   -15  140 12 50  141 25 44  136 31 20  145  5  5
    141 18 37   -33  0  0    9 26 21     3    22   -15  140 42 36  141 54 37  137  3 56  145 31 20
    141 47 26   -32  0  0    9 26 21     4    22   -16  141 11 50  142 22 59  137 35 51  145 57 14

    142 15 45   -31  0  0    9 26 20     5    21   -16  141 40 34  142 50 55  138  7  6  146 22 49
    142 43 39   -30  0  0    9 26 20     6    21   -17  142  8 50  143 18 25  138 37 46  146 48  6
    143 11  7   -29  0  0    9 26 19     7    21   -17  142 36 41  143 45 33  139  7 53  147 13  8
    143 38 14   -28  0  0    9 26 18     8    21   -17  143  4  7  144 12 19  139 37 28  147 37 55
    144  4 59   -27  0  0    9 26 17     9    20   -18  143 31 12  144 38 45  140  6 34  148  2 29

    144 31 26   -26  0  0    9 26 15    10    20   -18  143 57 57  145  4 54  140 35 13  148 26 52
    144 57 35   -25  0  0    9 26 14    11    20   -18  144 24 23  145 30 46  141  3 27  148 51  4
    145 23 28   -24  0  0    9 26 12    13    20   -19  144 50 33  145 56 23  141 31 18  149 15  7
    145 49  6   -23  0  0    9 26 11    14    20   -19  145 16 26  146 21 46  141 58 47  149 39  1
    146 14 31   -22  0  0    9 26  9    15    20   -20  145 42  6  146 46 57  142 25 57  150  2 49

    146 39 45   -21  0  0    9 26  7    16    19   -20  146  7 32  147 11 57  142 52 48  150 26 32
    147  4 47   -20  0  0    9 26  5    17    19   -20  146 32 48  147 36 47  143 19 22  150 50  9
    147 29 40   -19  0  0    9 26  2    18    19   -21  146 57 52  148  1 28  143 45 41  151 13 43
    147 54 25   -18  0  0    9 26  0    19    19   -21  147 22 48  148 26  2  144 11 45  151 37 14
    148 19  3   -17  0  0    9 25 58    20    19   -21  147 47 36  148 50 30  144 37 37  152  0 43

    148 43 34   -16  0  0    9 25 55    21    19   -22  148 12 17  149 14 52  145  3 17  152 24 12
    149  8  0   -15  0  0    9 25 52    22    19   -22  148 36 51  149 39 10  145 28 47  152 47 40
    149 32 23   -14  0  0    9 25 49    23    18   -22  149  1 22  150  3 24  145 54  7  153 11 10
    149 56 42   -13  0  0    9 25 46    24    18   -22  149 25 48  150 27 36  146 19 19  153 34 41
    150 20 59   -12  0  0    9 25 43    25    18   -23  149 50 12  150 51 47  146 44 25  153 58 15

    150 45 15   -11  0  0    9 25 40    26    18   -23  150 14 33  151 15 57  147  9 24  154 21 53
    151  9 30   -10  0  0    9 25 36    27    18   -23  150 38 54  151 40  8  147 34 18  154 45 36
    151 33 47   - 9  0  0    9 25 33    28    18   -24  151  3 15  152  4 20  147 59  8  155  9 24
    151 58  5   - 8  0  0    9 25 29    30    18   -24  151 27 37  152 28 34  148 23 55  155 33 18
    152 22 25   - 7  0  0    9 25 25    31    18   -24  151 52  1  152 52 52  148 48 40  155 57 19

    152 46 50   - 6  0  0    9 25 21    32    18   -24  152 16 27  153 17 13  149 13 24  156 21 29
    153 11 18   - 5  0  0    9 25 17    33    18   -25  152 40 57  153 41 40  149 38  8  156 45 47
    153 35 51   - 4  0  0    9 25 13    34    18   -25  153  5 32  154  6 12  150  2 53  157 10 15
    154  0 31   - 3  0  0    9 25  9    35    17   -25  153 30 13  154 30 52  150 27 39  157 34 53
    154 25 18   - 2  0  0    9 25  4    36    17   -25  153 54 59  154 55 39  150 52 27  157 59 44

    154 50 13   - 1  0  0    9 25  0    37    17   -26  154 19 53  155 20 34  151 17 20  158 24 47
    

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