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ASTROMETRIC UPDATE:
OCCULTATION BY (5130) ILIONEUS - 2013 Aug 18

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2013 JUL 04, 05:09 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.

Ilioneus Update Map


On 2013 Aug 18 UT, the 53 km diameter asteroid (5130) Ilioneus will occult a 11.3 mag star in the constellation Pisces for observers along a path possibly across New Zealand.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 17.0 mag (the magnitude of the asteroid) for at most 6.4 seconds.

This update is based on 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
   -141  3  9   -54  0  0   15 55 15     1   306    -6 -139 37 55 -142 29 40  ... .. .. -156 53 55
   -143 32 16   -53  0  0   15 55 16     3   308    -8 -142  6 41 -144 59 18  ... .. .. -159 38  6
   -146  4 28   -52  0  0   15 55 19     4   310    -9 -144 38 11 -147 32 23  ... .. .. -162 31 35
   -148 40 33   -51  0  0   15 55 23     6   312   -10 -147 13  9 -150  9 45  ... .. .. -165 36 49
   -151 21 26   -50  0  0   15 55 30     8   314   -12 -149 52 28 -152 52 27  ... .. .. -168 57 19

   -154  8 16   -49  0  0   15 55 38    10   316   -14 -152 37 11 -155 41 43  ... .. .. -172 38 31
   -157  2 28   -48  0  0   15 55 49    12   318   -16 -155 28 34 -158 39  9  ... .. .. -176 49 43
   -160  5 52   -47  0  0   15 56  3    14   321   -18 -158 28 15 -161 46 49  ... .. ..  178 10 16
   -163 20 56   -46  0  0   15 56 20    16   323   -20 -161 38 22 -165  7 38  ... .. ..  171 28 41
   -166 51 12   -45  0  0   15 56 41    19   326   -22 -165  1 53 -168 45 51  ... .. ..  ... .. ..

   -170 42  4   -44  0  0   15 57  6    21   329   -25 -168 43 13 -172 48 15  ... .. ..  ... .. ..
   -175  2 37   -43  0  0   15 57 39    23   333   -28 -172 49 24 -177 27  3 -157 12 45  ... .. ..
    179 49 12   -42  0  0   15 58 20    26   338   -32 -177 33 13  176 50 51 -160 29 50  ... .. ..
    173  5 42   -41  0  0   15 59 20    28   344   -37  176 36 40  168 29 19 -164  0 45  ... .. ..

Uncertainty in time = +/- 45 secs

Prediction of 2013 Jul  4.0

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