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ASTROMETRIC UPDATE:
OCCULTATION BY (11151) OODAIGAHARA - 2009 OCT 12

[Detailed Finder Charts]


Updated:   2009 SEP 07, 01:12 UT

Event Rank : 8

(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.

Oodaigahara Update Map


On 2009 Oct 12 UT, the 11 km diameter asteroid (11151) Oodaigahara will occult a 8.0 mag star in the constellation Andromeda for observers along a narrow, significant uncertainty path across Australia, running from Mackay to Eucla.

In the case of an occultation, the combined light of the asteroid and the star will drop by 7.6 mag to 15.6 mag (the magnitude of the asteroid) for at most 1.1 seconds.

This update is based on 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 :
                  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
    123 52 37   -37  0  0   15 59 15    26   344   -45  123 43 22  124  1 53  121 19  8  126 34 28
    124 53 43   -36  0  0   15 59  3    27   343   -46  124 44 24  125  3  4  122 19  9  127 37  4
    125 57 26   -35  0  0   15 58 51    28   342   -47  125 48  1  126  6 52  123 21 28  128 42 41
    127  3 57   -34  0  0   15 58 38    28   340   -47  126 54 25  127 13 31  124 26 15  129 51 33
    128 13 30   -33  0  0   15 58 24    29   339   -48  128  3 49  128 23 12  125 33 41  131  3 56

    129 26 20   -32  0  0   15 58 10    29   338   -49  129 16 29  129 36 13  126 43 57  132 20 13
    130 42 47   -31  0  0   15 57 55    30   336   -49  130 32 44  130 52 53  127 57 19  133 40 48
    132  3 14   -30  0  0   15 57 39    30   335   -50  131 52 56  132 13 35  129 14  4  135  6 14
    133 28  9   -29  0  0   15 57 23    31   333   -50  133 17 33  133 38 48  130 34 34  136 37 12
    134 58  8   -28  0  0   15 57  6    31   332   -51  134 47 11  135  9  9  131 59 14  138 14 35

    136 33 57   -27  0  0   15 56 47    31   330   -51  136 22 33  136 45 25  133 28 37  139 59 34
    138 16 35   -26  0  0   15 56 28    31   328   -51  138  4 39  138 28 36  135  3 23  141 53 47
    140  7 23   -25  0  0   15 56  8    31   326   -51  139 54 45  140 20  7  136 44 23  143 59 39
    142  8 15   -24  0  0   15 55 46    31   324   -50  141 54 43  142 21 54  138 32 46  146 20 53
    143  0  0   -23 36  0   15 55 36    31   323   -50  -23 29 38  -23 42 23  -21 50 36  -25 27 39

    144  0  0   -23  9 25   15 55 26    31   322   -50  -23  3  7  -23 15 44  -21 25  3  -24 59 50
    145  0  0   -22 44  8   15 55 15    31   322   -50  -22 37 54  -22 50 23  -21  0 44  -24 33 26
    146  0  0   -22 20 10   15 55  5    30   321   -49  -22 13 59  -22 26 21  -20 37 39  -24  8 24
    147  0  0   -21 57 28   15 54 55    30   320   -49  -21 51 20  -22  3 36  -20 15 47  -23 44 43
    148  0  0   -21 36  2   15 54 45    30   319   -49  -21 29 57  -21 42  7  -19 55  7  -23 22 23

    149  0  0   -21 15 50   15 54 35    30   318   -48  -21  9 48  -21 21 53  -19 35 39  -23  1 21
    150  0  0   -20 56 53   15 54 25    29   317   -48  -20 50 54  -21  2 54  -19 17 22  -22 41 38
    151  0  0   -20 39 10   15 54 15    29   316   -47  -20 33 13  -20 45  8  -19  0 15  -22 23 12
    152  0  0   -20 22 39   15 54  6    28   316   -47  -20 16 44  -20 28 35  -18 44 17  -22  6  2
    153  0  0   -20  7 20   15 53 57    28   315   -46  -20  1 27  -20 13 14  -18 29 29  -21 50  8

    154  0  0   -19 53 13   15 53 48    27   314   -45  -19 47 22  -19 59  6  -18 15 50  -21 35 29
    155  0  0   -19 40 18   15 53 39    27   313   -45  -19 34 28  -19 46  9  -18  3 19  -21 22  5
Uncertainty in time = +/- 15 secs

Prediction of 2009 Sep  7.0

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