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ASTROMETRIC UPDATE:
OCCULTATION BY (718) ERIDA - 2017 Jun 07

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2017 APR 12, 17:32 UT

Event Rank : 74

(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.

Erida Update Map


On 2017 Jun 07 UT, the 71 km diameter asteroid (718) Erida will occult a 12.5 mag star in the constellation Capricornus for observers along a broad, somewhat uncertain path across Australa, from near Cape York across eastern Queensland to Goondiwindi and across north-eastern New South Wales to Newcastle.

In the case of an occultation, the combined light of the asteroid and the star will drop by 2.28 mag to 14.60 mag (the magnitude of the asteroid) for at most 20.9 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, astrometry for the asteroid kindly provided by the IAU Minor Planet Center.

This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

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       Alt
  E. Longitude   Latitude      U.T.    Alt    Az   Alt    Limit 1    Limit 2    Limit 3    Limit 4   Crn
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
                                                        Longitude  Longitude  Longitude  Longitude
    140 54 23   - 9  0  0   18 27 29    73   158   -33  140 33 42  141 15  5  140  8  4  141 40 45   0.01
    141 17  6   -10  0  0   18 28  4    74   158   -33  140 56 20  141 37 52  140 30 37  142  3 37   0.01

    141 40  1   -11  0  0   18 28 40    75   159   -33  141 19 10  142  0 51  140 53 21  142 26 43   0.00
    142  3  9   -12  0  0   18 29 15    76   159   -32  141 42 13  142 24  6  141 16 17  142 50  5   0.00
    142 26 33   -13  0  0   18 29 51    77   160   -32  142  5 31  142 47 36  141 39 28  143 13 43   0.00
    142 50 15   -14  0  0   18 30 27    79   160   -32  142 29  6  143 11 24  142  2 54  143 37 39   0.00
    143 14 15   -15  0  0   18 31  3    80   161   -32  142 53  0  143 35 32  142 26 39  144  1 57  -0.01

    143 38 37   -16  0  0   18 31 40    81   162   -32  143 17 14  144  0  2  142 50 43  144 26 36  -0.01
    144  3 22   -17  0  0   18 32 16    82   163   -31  143 41 50  144 24 55  143 15  9  144 51 41  -0.01
    144 28 32   -18  0  0   18 32 53    83   165   -31  144  6 50  144 50 14  143 39 58  145 17 12  -0.02
    144 54  9   -19  0  0   18 33 30    84   168   -31  144 32 18  145 16  2  144  5 14  145 43 12  -0.02
    145 20 16   -20  0  0   18 34  7    85   171   -31  144 58 14  145 42 19  144 30 57  146  9 43  -0.02

    145 46 55   -21  0  0   18 34 45    86   177   -30  145 24 41  146  9 10  144 57 10  146 36 47  -0.02
    146 14  8   -22  0  0   18 35 22    87   188   -30  145 51 42  146 36 35  145 23 56  147  4 29  -0.03
    146 41 58   -23  0  0   18 35 59    87   209   -30  146 19 20  147  4 39  145 51 17  147 32 49  -0.04
    147 10 29   -24  0  0   18 36 37    87   245   -29  146 47 36  147 33 23  146 19 17  148  1 51  -0.04
    147 39 42   -25  0  0   18 37 15    87   277   -29  147 16 34  148  2 52  146 47 57  148 31 38  -0.04

    148  9 41   -26  0  0   18 37 53    86   295   -29  147 46 18  148 33  7  147 17 21  149  2 14  -0.04
    148 40 31   -27  0  0   18 38 31    85   304   -28  148 16 50  149  4 14  147 47 32  149 33 42  -0.04
                                                         Latitude   Latitude   Latitude   Latitude
    149  0  0   -27 37  6   18 38 54    85   307   -28  -28 22  2  -26 51 57  -29 17 29  -25 55 40  -0.04
    150  0  0   -29 27 12   18 40  4    83   313   -27  -30 10 46  -28 43 25  -31  4 32  -27 48 51  -0.04
    151  0  0   -31 11 19   18 41 11    81   316   -27  -31 53 34  -30 28 52  -32 45 43  -29 35 58  -0.05

    152  0  0   -32 49 43   18 42 14    79   317   -26  -33 30 42  -32  8 33  -34 21 17  -31 17 15  -0.05
    153  0  0   -34 22 42   18 43 13    77   318   -25  -35  2 28  -33 42 45  -35 51 34  -32 52 58  -0.05
    154  0  0   -35 50 32   18 44 10    75   318   -25  -36 29  9  -35 11 45  -37 16 50  -34 23 26  -0.06
    155  0  0   -37 13 32   18 45  3    74   318   -24  -37 51  4  -36 35 51  -38 37 24  -35 48 55  -0.06

Uncertainty in time = +/- 13 secs

Prediction of 2017 Apr 12.0


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