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ASTROMETRIC UPDATE:
OCCULTATION BY (559) NANON - 2011 Feb 14

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2010 OCT 19, 21:55 UT

Event Rank : 79

(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.

Nanon Update Map


On 2011 Feb 14 UT, the 82 km diameter asteroid (559) Nanon will occult a 11.6 mag star in the constellation Taurus for observers along a path from Melbourne to Grafton passing near Canberra and Sydney.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.0 mag to 14.6 mag (the magnitude of the asteroid) for at most 8.1 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
    139 41 14   -43  0  0   10 16 46    29   347    -5  140 38 59  138 44  9  141 59 53  137 26 25
    140 32 45   -42  0  0   10 16 57    30   346    -6  141 30 13  139 35 59  142 50 43  138 18 43
    141 25 16   -41  0  0   10 17  8    31   345    -7  142 22 30  140 28 46  143 42 44  139 11 52
    142 18 51   -40  0  0   10 17 19    32   344    -9  143 15 55  141 22 32  144 35 58  140  5 55
    143 13 34   -39  0  0   10 17 31    32   343   -10  144 10 33  142 17 21  145 30 31  141  0 56

    144  9 30   -38  0  0   10 17 43    33   341   -11  145  6 28  143 13 19  146 26 27  141 56 59
    145  6 43   -37  0  0   10 17 55    34   340   -12  146  3 45  144 10 30  147 23 53  142 54 10
    146  5 19   -36  0  0   10 18  8    34   339   -13  147  2 30  145  9  0  148 22 54  143 52 34
    147  5 25   -35  0  0   10 18 22    35   337   -14  148  2 49  146  8 54  149 23 37  144 52 15
    148  7  7   -34  0  0   10 18 35    35   336   -16  149  4 51  147 10 19  150 26 11  145 53 21

    149 10 34   -33  0  0   10 18 50    36   334   -17  150  8 44  148 13 23  151 30 45  146 55 59
    150 15 54   -32  0  0   10 19  4    36   333   -18  151 14 36  149 18 14  152 37 29  148  0 16
    151 23 17   -31  0  0   10 19 19    37   331   -20  152 22 40  150 25  2  153 46 35  149  6 20
    152 32 56   -30  0  0   10 19 35    37   329   -21  153 33  6  151 33 57  154 58 17  150 14 22
    153 45  3   -29  0  0   10 19 51    37   327   -22  154 46 11  152 45 13  156 12 52  151 24 34

    154 59 55   -28  0  0   10 20  8    38   326   -24  156  2 11  153 59  2  157 30 40  152 37  7
    156 17 48   -27  0  0   10 20 25    38   324   -26  157 21 27  155 15 42  158 52  3  153 52 17
    157 39  7   -26  0  0   10 20 43    38   322   -27  158 44 22  156 35 33  160 17 31  155 10 22
    159  4 17   -25  0  0   10 21  1    38   320   -29  160 11 28  157 59  0  161 47 40  156 31 41
    160 33 50   -24  0  0   10 21 20    38   318   -31  161 43 20  159 26 30  163 23 13  157 56 41

Uncertainty in time = +/- 6 secs

Prediction of 2011 Jan 27.0

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