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ASTROMETRIC UPDATE:
OCCULTATION BY (1264) LETABA - 2012 Aug 09

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2012 JUN 21, 02:39 UT

Event Rank : 65

(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.

Letaba Update Map


On 2012 Aug 09 UT, the 70 km diameter asteroid (1264) Letaba will occult a 11.8 mag star in the constellation Triangulum for observers along a south-to-north path across New Zealand centred from near Te Anau to near Auckland.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.5 mag to 15.2 mag (the magnitude of the asteroid) for at most 6.5 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
    161 34 31   -53  0  0   17 11 51     5    15   -31  162 36 41  160 33  6  164 34 32  ... .. ..
    162 17 11   -52  0  0   17 11 53     6    14   -31  163 18 27  161 16 40  165 14 37  159 25 58
    163  1  5   -51  0  0   17 11 55     8    14   -31  164  1 33  162  1 22  165 56 13  160 12 11
    163 46 14   -50  0  0   17 11 58     9    13   -31  164 45 59  162 47 14  166 39 20  160 59 24
    164 32 38   -49  0  0   17 12  2    10    13   -30  165 31 45  163 34 17  167 23 57  161 47 38

    165 20 19   -48  0  0   17 12  5    11    12   -30  166 18 54  164 22 32  168 10  7  162 36 56
    166  9 20   -47  0  0   17 12 10    12    11   -30  167  7 27  165 12  0  168 57 50  163 27 19
    166 59 41   -46  0  0   17 12 14    13    10   -29  167 57 25  166  2 45  169 47  9  164 18 50
    167 51 26   -45  0  0   17 12 20    14    10   -29  168 48 53  166 54 49  170 38  8  165 11 31
    168 44 39   -44  0  0   17 12 25    15     9   -28  169 41 53  167 48 15  171 30 48  166  5 26

    169 39 22   -43  0  0   17 12 31    16     8   -28  170 36 30  168 43  8  172 25 16  167  0 39
    170 35 42   -42  0  0   17 12 38    17     7   -27  171 32 47  169 39 31  173 21 36  167 57 13
    171 33 43   -41  0  0   17 12 45    18     6   -26  172 30 52  170 37 30  174 19 54  168 55 14
    172 33 32   -40  0  0   17 12 53    19     6   -26  173 30 51  171 37 12  175 20 18  169 54 48
    173 35 15   -39  0  0   17 13  2    21     5   -25  174 32 50  172 38 42  176 22 56  170 55 59

    174 39  2   -38  0  0   17 13 11    22     4   -24  175 37  0  173 42  8  177 27 59  171 58 56
    175 45  1   -37  0  0   17 13 20    23     3   -23  176 43 30  174 47 40  178 35 39  173  3 47
    176 53 24   -36  0  0   17 13 31    24     2   -22  177 52 33  175 55 28  179 46 10  174 10 40
    178  4 24   -35  0  0   17 13 42    25     0   -21  179  4 23  177  5 45 -179  0 11  175 19 47
    179 18 18   -34  0  0   17 13 53    26   359   -20 -179 40 43  178 18 44 -177 43  3  176 31 20

   -179 24 37   -33  0  0   17 14  6    27   358   -18 -178 22 24  179 34 42 -176 22  1  177 45 33
   -178  3 58   -32  0  0   17 14 19    28   356   -17 -177  0 15 -179  5 59 -174 56 33  179  2 44
   -176 39 17   -31  0  0   17 14 34    29   355   -16 -175 33 44 -177 42 55 -173 25 59 -179 36 46
   -175  9 59   -30  0  0   17 14 49    29   353   -14 -174  2 13 -176 15 35 -171 49 28 -178 12 34
   -173 35 21   -29  0  0   17 15  6    30   352   -13 -172 24 51 -174 43 22 -170  5 51 -176 44  8

Uncertainty in time = +/- 6 secs

Prediction of 2012 Jun 21.0

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