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ASTROMETRIC UPDATE:
OCCULTATION BY (482) PETRINA - 2009 Nov 17

[Detailed Finder Charts]


Updated:   2009 OCT 16, 23:37 UT

Event Rank : 57

(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.

Petrina Update Map


On 2009 Nov 17 UT, the 47 km diameter asteroid (482) Petrina will occult a 11.5 mag star in the constellation Monoceros for observers along a path across Papua New Guinea and then Darwin (low altitude).

In the case of an occultation, the combined light of the asteroid and the star will drop by 2.8 mag to 14.2 mag (the magnitude of the asteroid) for at most 5.6 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 :
                   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 14   -14  0  0   13  9 35     6    84   -42  122  8 17  125 23 22  ... .. ..  128 15 34
    129 24 41   -13  0  0   13  9 23    11    83   -47  128 15 28  130 29 51  125 23 43  132 41 57
                                                         Latitude   Latitude   Latitude   Latitude
    130  0  0   -12 52 19   13  9 21    12    83   -47  -12 37 55  -13  6 41  -12  6  9  -13 38 11
    131  0  0   -12 38 40   13  9 18    13    83   -48  -12 24 14  -12 53  4  -11 52 24  -13 24 39
    132  0  0   -12 24 18   13  9 15    14    82   -49  -12  9 50  -12 38 44  -11 37 54  -13 10 24

    133  0  0   -12  9 11   13  9 11    15    82   -50  -11 54 41  -12 23 40  -11 22 40  -12 55 25
    134  0  0   -11 53 21   13  9  7    16    82   -50  -11 38 48  -12  7 52  -11  6 41  -12 39 42
    135  0  0   -11 36 46   13  9  3    17    82   -51  -11 22 11  -11 51 20  -10 49 58  -12 23 16
    136  0  0   -11 19 27   13  8 59    18    82   -52  -11  4 49  -11 34  4  -10 32 30  -12  6  6
    137  0  0   -11  1 24   13  8 54    19    82   -53  -10 46 43  -11 16  3  -10 14 18  -11 48 11

    138  0  0   -10 42 36   13  8 49    20    81   -54  -10 27 52  -10 57 18  - 9 55 20  -11 29 33
    139  0  0   -10 23  4   13  8 44    21    81   -55  -10  8 17  -10 37 49  - 9 35 38  -11 10 10
    140  0  0   -10  2 47   13  8 39    22    81   -55  - 9 47 56  -10 17 35  - 9 15 11  -10 50  4
    141  0  0   - 9 41 45   13  8 33    23    81   -56  - 9 26 52  - 9 56 37  - 8 53 59  -10 29 13
    142  0  0   - 9 19 59   13  8 27    24    81   -57  - 9  5  2  - 9 34 54  - 8 32  1  -10  7 37

    143  0  0   - 8 57 28   13  8 21    25    81   -58  - 8 42 27  - 9 12 26  - 8  9 19  - 9 45 17
    144  0  0   - 8 34 12   13  8 15    26    81   -59  - 8 19  7  - 8 49 14  - 7 45 51  - 9 22 12
    145  0  0   - 8 10 11   13  8  8    27    81   -59  - 7 55  3  - 8 25 17  - 7 21 38  - 8 58 23
    146  0  0   - 7 45 25   13  8  1    28    81   -60  - 7 30 13  - 8  0 34  - 6 56 40  - 8 33 49
    147  0  0   - 7 19 53   13  7 53    29    81   -61  - 7  4 38  - 7 35  7  - 6 30 56  - 8  8 31

    148  0  0   - 6 53 37   13  7 46    30    81   -62  - 6 38 18  - 7  8 55  - 6  4 27  - 7 42 27
    149  0  0   - 6 26 36   13  7 38    31    81   -63  - 6 11 12  - 6 41 58  - 5 37 12  - 7 15 39
    150  0  0   - 5 58 50   13  7 30    32    81   -63  - 5 43 22  - 6 14 17  - 5  9 13  - 6 48  7
    151  0  0   - 5 30 19   13  7 21    33    81   -64  - 5 14 47  - 5 45 50  - 4 40 28  - 6 19 50
    152  0  0   - 5  1  4   13  7 13    34    81   -65  - 4 45 27  - 5 16 38  - 4 10 58  - 5 50 48

    153  0  0   - 4 31  3   13  7  4    35    82   -66  - 4 15 22  - 4 46 42  - 3 40 42  - 5 21  1
    154  0  0   - 4  0 18   13  6 54    36    82   -66  - 3 44 32  - 4 16  2  - 3  9 42  - 4 50 31
    155  0  0   - 3 28 48   13  6 45    37    82   -67  - 3 12 57  - 3 44 37  - 2 37 57  - 4 19 16
    156  0  0   - 2 56 34   13  6 35    38    82   -68  - 2 40 38  - 3 12 27  - 2  5 28  - 3 47 17
    157  0  0   - 2 23 35   13  6 25    39    83   -68  - 2  7 35  - 2 39 34  - 1 32 14  - 3 14 34

Uncertainty in time = +/- 7 secs

Prediction of 2009 Oct 16.0

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