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ASTROMETRIC UPDATE:
OCCULTATION BY (3901) NANJINGDAXUE - 2011 Nov 19

[Detailed Finder Charts]


Updated:   2011 SEP 24, 03:07 UT

Event Rank : 16

(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.

Nanjingdaxue Update Map


On 2011 Nov 19 UT, the 21 km diameter asteroid (3901) Nanjingdaxue will occult a 9.3 mag star in the constellation Perseus for observers along a narrow but quite uncertain path across Australia centred from just north of Brisbane to Longreach, and in Western Australia near Port Hedland, Karratha and Broome. In Queensland, Rockhampton is just outside the 1-sigma uncertainty area.

In the case of an occultation, the combined light of the asteroid and the star will drop by 8.2 mag to 17.5 mag (the magnitude of the asteroid) for at most 1.3 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
    163  4 23   -33  0  0   15 48 17    14   335   -23  163 23 47  162 44 50  166  0 29  159 54 51
    161 40 56   -32  0  0   15 48 22    15   336   -25  162  0 47  161 20 54  164 40 48  158 26 14
    160 13  4   -31  0  0   15 48 27    17   337   -26  160 33 28  159 52 28  163 17 27  156 52  6
    158 40 11   -30  0  0   15 48 34    18   338   -28  159  1 15  158 18 53  161 50  2  155 11 33
    157  1 30   -29  0  0   15 48 41    20   339   -29  157 23 24  156 39 22  160 17 58  153 23 23

    155 16  4   -28  0  0   15 48 50    21   340   -31  155 38 58  154 52 52  158 40 37  151 25 57
    153 22 30   -27  0  0   15 48 59    23   341   -33  153 46 40  152 57 58  156 57  6  149 16 51
    151 18 57   -26  0  0   15 49 10    24   343   -35  151 44 46  150 52 41  155  6 18  146 52 24
                                                         Latitude   Latitude   Latitude   Latitude
    150  0  0   -25 24 28   15 49 17    25   344   -36  -25 12 36  -25 36 25  -23 35 59  -27 19 22
    149  0  0   -24 58 54   15 49 22    26   344   -37  -24 47  8  -25 10 44  -23 11 25  -26 52 37

    148  0  0   -24 34 33   15 49 28    26   345   -38  -24 22 53  -24 46 16  -22 48  0  -26 27  9
    147  0  0   -24 11 24   15 49 34    27   346   -39  -23 59 51  -24 23  1  -22 25 44  -26  2 59
    146  0  0   -23 49 27   15 49 39    27   347   -39  -23 37 59  -24  0 58  -22  4 36  -25 40  3
    145  0  0   -23 28 40   15 49 45    28   348   -40  -23 17 18  -23 40  6  -21 44 35  -25 18 23
    144  0  0   -23  9  4   15 49 51    29   348   -41  -22 57 46  -23 20 25  -21 25 42  -24 57 56

    143  0  0   -22 50 36   15 49 57    29   349   -42  -22 39 24  -23  1 53  -21  7 55  -24 38 42
    142  0  0   -22 33 18   15 50  3    29   350   -42  -22 22  9  -22 44 30  -20 51 13  -24 20 40
    141  0  0   -22 17  7   15 50  9    30   351   -43  -22  6  3  -22 28 16  -20 35 37  -24  3 49
    140  0  0   -22  2  4   15 50 15    30   352   -44  -21 51  3  -22 13  9  -20 21  6  -23 48  9
    139  0  0   -21 48  8   15 50 22    31   353   -44  -21 37 11  -21 59 10  -20  7 39  -23 33 40

    138  0  0   -21 35 19   15 50 28    31   354   -45  -21 24 24  -21 46 17  -19 55 16  -23 20 19
    137  0  0   -21 23 35   15 50 34    31   354   -45  -21 12 44  -21 34 31  -19 43 57  -23  8  8
    136  0  0   -21 12 58   15 50 40    31   355   -46  -21  2  8  -21 23 51  -19 33 41  -22 57  5
    135  0  0   -21  3 25   15 50 47    32   356   -47  -20 52 38  -21 14 16  -19 24 28  -22 47 10
    134  0  0   -20 54 58   15 50 53    32   357   -47  -20 44 13  -21  5 47  -19 16 18  -22 38 23

    133  0  0   -20 47 35   15 50 59    32   358   -47  -20 36 52  -20 58 22  -19  9 10  -22 30 44
    132  0  0   -20 41 17   15 51  6    32   359   -48  -20 30 35  -20 52  3  -19  3  5  -22 24 11
    131  0  0   -20 36  4   15 51 12    32   360   -48  -20 25 23  -20 46 48  -18 58  1  -22 18 45
    130  0  0   -20 31 54   15 51 19    32     1   -49  -20 21 14  -20 42 37  -18 54  0  -22 14 26
    129  0  0   -20 28 48   15 51 25    32     2   -49  -20 18  9  -20 39 31  -18 51  0  -22 11 13

    128  0  0   -20 26 47   15 51 31    32     3   -49  -20 16  8  -20 37 29  -18 49  3  -22  9  7
    127  0  0   -20 25 49   15 51 38    32     4   -49  -20 15 10  -20 36 31  -18 48  6  -22  8  7
    126  0  0   -20 25 55   15 51 44    32     4   -49  -20 15 16  -20 36 37  -18 48 12  -22  8 14
    125  0  0   -20 27  5   15 51 51    32     5   -50  -20 16 26  -20 37 47  -18 49 20  -22  9 26
    124  0  0   -20 29 19   15 51 57    32     6   -50  -20 18 39  -20 40  1  -18 51 29  -22 11 46

    123  0  0   -20 32 36   15 52  3    32     7   -50  -20 21 56  -20 43 20  -18 54 40  -22 15 11
    122  0  0   -20 36 58   15 52 10    32     8   -50  -20 26 17  -20 47 43  -18 58 52  -22 19 43
    121  0  0   -20 42 24   15 52 16    31     9   -50  -20 31 42  -20 53 10  -19  4  7  -22 25 22
    120  0  0   -20 48 55   15 52 22    31    10   -50  -20 38 11  -20 59 42  -19 10 25  -22 32  8
    119  0  0   -20 56 30   15 52 28    31    11   -50  -20 45 44  -21  7 19  -19 17 44  -22 40  1

    118  0  0   -21  5 10   15 52 35    31    12   -50  -20 54 22  -21 16  1  -19 26  6  -22 49  2
    117  0  0   -21 14 55   15 52 41    30    12   -49  -21  4  5  -21 25 49  -19 35 32  -22 59 11
    116  0  0   -21 25 46   15 52 47    30    13   -49  -21 14 54  -21 36 42  -19 46  0  -23 10 28
    115  0  0   -21 37 43   15 52 53    29    14   -49  -21 26 48  -21 48 42  -19 57 32  -23 22 53
    114  0  0   -21 50 47   15 52 59    29    15   -49  -21 39 48  -22  1 49  -20 10  8  -23 36 29

    113  0  0   -22  4 57   15 53  5    29    16   -48  -21 53 55  -22 16  2  -20 23 48  -23 51 13
    112  0  0   -22 20 14   15 53 10    28    17   -48  -22  9  8  -22 31 24  -20 38 33  -24  7  9
    111  0  0   -22 36 40   15 53 16    28    17   -47  -22 25 30  -22 47 53  -20 54 23  -24 24 15
    110  0  0   -22 54 13   15 53 22    27    18   -47  -22 42 59  -23  5 31  -21 11 19  -24 42 34
    109  0  0   -23 12 56   15 53 27    26    19   -47  -23  1 37  -23 24 19  -21 29 20  -25  2  5

    108  0  0   -23 32 49   15 53 33    26    20   -46  -23 21 25  -23 44 17  -21 48 29  -25 22 49
    107  0  0   -23 53 52   15 53 38    25    20   -45  -23 42 23  -24  5 26  -22  8 45  -25 44 48
    106  0  0   -24 16  7   15 53 44    24    21   -45  -24  4 32  -24 27 46  -22 30  9  -26  8  2
    105  0  0   -24 39 33   15 53 49    24    22   -44  -24 27 52  -24 51 19  -22 52 42  -26 32 32
    104  0  0   -25  4 13   15 53 54    23    22   -44  -24 52 25  -25 16  5  -23 16 24  -26 58 19

Uncertainty in time = +/- 6 secs

Prediction of 2011 Sep 24.0

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