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ASTROMETRIC UPDATE:
OCCULTATION BY (1222) TINA - 2012 OCT 16

[Detailed Finder Charts]


Updated:   2012 Oct 07, 18:54 UT

Event Rank : 33

(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.

Tina Update Map


On 2012 Oct 16 UT, the 26 km diameter asteroid (1222) Tina will occult a 8.2 mag star in the constellation Triangulum for observers along a path across south-east Queensland and central New South Wales, passing near Toowoomba and Brisbane.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.8 mag to 14.0 mag (the magnitude of the asteroid) for at most 2.1 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: .

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 TYC 2308-00989-1 by 1222 Tina on 2012 Oct 16 
                  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
    141 19 34   -37  0  0   11  4  3     4    46   -25  141  6 42  141 32 25  140 13 43  142 24 51
    142 36 54   -36  0  0   11  4  2     5    45   -26  142 24 19  142 49 27  141 32 33  143 40 45
    143 51 52   -35  0  0   11  4  1     7    44   -28  143 39 33  144  4 10  142 48 53  144 54 23
    145  4 40   -34  0  0   11  3 59     8    44   -29  144 52 36  145 16 43  144  2 58  146  5 58
    146 15 30   -33  0  0   11  3 57     9    43   -31  146  3 40  146 27 20  145 14 58  147 15 41

    147 24 32   -32  0  0   11  3 55    11    42   -32  147 12 54  147 36  9  146 25  5  148 23 39
    148 31 54   -31  0  0   11  3 52    12    42   -33  148 20 28  148 43 20  147 33 27  149 30  4
    149 37 45   -30  0  0   11  3 50    14    41   -35  149 26 30  149 49  0  148 40 13  150 35  1
    150 42 12   -29  0  0   11  3 47    15    41   -36  150 31  7  150 53 17  149 45 32  151 38 38
    151 45 23   -28  0  0   11  3 43    16    40   -37  151 34 26  151 56 18  150 49 30  152 41  2

    152 47 22   -27  0  0   11  3 40    18    40   -39  152 36 35  152 58  9  151 52 14  153 42 18
    153 48 17   -26  0  0   11  3 36    19    39   -40  153 37 37  153 58 56  152 53 50  154 42 33
    154 48 12   -25  0  0   11  3 32    20    39   -41  154 37 40  154 58 44  153 54 24  155 41 51
    155 47 13   -24  0  0   11  3 28    22    38   -43  155 36 48  155 57 39  154 54  1  156 40 18
Uncertainty in time = +/- 5 secs

Prediction of 2012 Oct  8.0


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