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ASTROMETRIC UPDATE:
OCCULTATION BY (186) CELUTA - 2012 Dec 29

[Detailed Finder Charts]


Updated:   2012 JUL 10, 07:11 UT

Event Rank : 39

(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.

Celuta Update Map


On 2012 Dec 29 UT, the 49 km diameter asteroid (186) Celuta will occult a 10.2 mag star in the constellation Scorpius for observers along a somewhat uncertain path across the North Island of New Zealand, from Wairoa to just south of Auckland, just at the edge of morning twilight. All of the North Island north of Waipukurau is within the one sigma limit.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 14.0 mag (the magnitude of the asteroid) for at most 1.1 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: 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
    158 36 27   -27  0  0   16  5 12     1   120   -27  157 54 23  159 17 58  ... .. ..  ... .. ..
    160 24 24   -28  0  0   16  5 12     3   120   -25  159 43 21  161  4 56  157 19 47  ... .. ..
                                                         Latitude   Latitude   Latitude   Latitude
    161  0  0   -28 20 17   16  5 12     3   119   -25  -28 43 34  -27 57 11  -30  4 21   .. .. ..
    162  0  0   -28 54 59   16  5 13     4   119   -24  -29 18 27  -28 31 43  -30 39 51   .. .. ..
    163  0  0   -29 30 21   16  5 13     5   118   -23  -29 54  0  -29  6 54  -31 16  3   .. .. ..

    164  0  0   -30  6 22   16  5 13     6   118   -22  -30 30 12  -29 42 45  -31 52 55   .. .. ..
    165  0  0   -30 43  1   16  5 14     7   117   -21  -31  7  2  -30 19 12  -32 30 25   .. .. ..
    166  0  0   -31 20 16   16  5 14     9   117   -20  -31 44 29  -30 56 17  -33  8 34  -29 36 18
    167  0  0   -31 58  8   16  5 15    10   116   -19  -32 22 32  -31 33 58  -33 47 19  -30 13 23
    168  0  0   -32 36 35   16  5 16    11   116   -17  -33  1 11  -32 12 13  -34 26 41  -30 51  1

    169  0  0   -33 15 36   16  5 16    12   115   -16  -33 40 24  -32 51  2  -35  6 37  -31 29 13
    170  0  0   -33 55  9   16  5 17    13   114   -15  -34 20  9  -33 30 24  -35 47  6  -32  7 57
    171  0  0   -34 35 14   16  5 18    14   114   -14  -35  0 26  -34 10 16  -36 28  8  -32 47 12
    172  0  0   -35 15 48   16  5 19    15   113   -13  -35 41 13  -34 50 39  -37  9 40  -33 26 56
    173  0  0   -35 56 52   16  5 20    16   113   -12  -36 22 29  -35 31 30  -37 51 42  -34  7  8

    174  0  0   -36 38 22   16  5 21    17   112   -11  -37  4 12  -36 12 48  -38 34 11  -34 47 47
    175  0  0   -37 20 17   16  5 22    18   111   -10  -37 46 20  -36 54 31  -39 17  6  -35 28 51
    176  0  0   -38  2 37   16  5 24    19   110    -9  -38 28 52  -37 36 38  -40  0 25  -36 10 18
    177  0  0   -38 45 18   16  5 25    20   110    -8  -39 11 46  -38 19  7  -40 44  6  -36 52  8
    178  0  0   -39 28 19   16  5 26    21   109    -7  -39 55  1  -39  1 56  -41 28  8  -37 34 17

    179  0  0   -40 11 39   16  5 28    22   108    -6  -40 38 33  -39 45  3  -42 12 28  -38 16 45
    180  0  0   -40 55 15   16  5 29    23   107    -5  -41 22 22  -40 28 27  -42 57  4  -38 59 29
   -179  0  0   -41 39  5   16  5 30    24   106    -4  -42  6 25  -41 12  5  -43 41 54  -39 42 28
   -178  0  0   -42 23  8   16  5 32    24   105    -3  -42 50 40  -41 55 55  -44 26 55  -40 25 40
   -177  0  0   -43  7 20   16  5 34    25   105    -2  -43 35  5  -42 39 55  -45 12  7  -41  9  1

   -176  0  0   -43 51 40   16  5 35    26   104    -1  -44 19 37  -43 24  3  -45 57 25  -41 52 32

Uncertainty in time = +/- 2 secs

Prediction of 2012 Dec  3.0

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