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ASTROMETRIC UPDATE:
OCCULTATION BY (2308) SCHILT - 2008 Sep 25

[Detailed Finder Charts]


Updated:   2008 SEP 17, 01:34 UT

Event Rank : 15

(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.

Schilt Update Map


On 2008 Sep 25 UT, the 18 km diameter asteroid (2308) Schilt will occult a 9.7 mag star in the constellation Microscopium for observers along a very narrow path of significant uncertainty across the South Island of New Zealand, from Invercargill to west of Queenstown.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.9 mag to 15.6 mag (the magnitude of the asteroid) for at most 2.2 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 Limit1           Path Limit2           Error Limit1          Error Limit2
  E. Longitude    Latitude      U.T.    Alt   Az    Alt                                                                                       
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "
                                                         Longitude  Latitude   Longitude  Latitude   Longitude  Latitude   Longitude  Latitude
    168 20  4   -48 48 29    9 32 45    76    16   -26  168 12 43  -48 48 46  168 27 26  -48 48 13  167  8  8  -48 50 53  169 31 50  -48 45 31
    168  9 58   -47 20 32    9 33  5    77    18   -27  168  2 48  -47 20 48  168 17  7  -47 20 16  167  0  2  -47 22 53  169 19 43  -47 17 38
    167 59 55   -45 53  2    9 33 25    79    20   -28  167 52 57  -45 53 18  168  6 53  -45 52 46  166 51 50  -45 55 20  169  7 50  -45 50 11

    167 49 55   -44 25 55    9 33 45    80    24   -29  167 43  8  -44 26 11  167 56 43  -44 25 40  166 43 33  -44 28 10  168 56  8  -44 23  8
    167 39 58   -42 59  8    9 34  4    81    28   -29  167 33 20  -42 59 23  167 46 35  -42 58 52  166 35 10  -43  1 20  168 44 36  -42 56 24
    167 30  2   -41 32 36    9 34 24    82    34   -30  167 23 33  -41 32 51  167 36 31  -41 32 21  166 26 42  -41 34 46  168 33 13  -41 29 56
    167 20  7   -40  6 17    9 34 44    83    42   -31  167 13 46  -40  6 32  167 26 27  -40  6  3  166 18  8  -40  8 25  168 21 57  -40  3 40
    167 10 12   -38 40  8    9 35  4    84    53   -31  167  3 59  -38 40 22  167 16 25  -38 39 53  166  9 29  -38 42 13  168 10 48  -38 37 33

Uncertainty in time = +/- 10 secs

[Prediction of 2008 Sep 17.0]

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