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ASTROMETRIC UPDATE:
OCCULTATION BY (2842) UNSOLD - 2017 APR 16

[Detailed Finder Charts]


Updated:   2017 Feb 24, 23:23 UT

Event Rank : 17

(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.

Unsold Update Map


On 2017 Apr 16 UT, the 14 km diameter asteroid (2842) Unsold will occult a 9.3 mag star in the constellation Scorpius for observers along a very large uncertainty path across New Zealand, near the north-western parts of North Island and south and western parts of South Island, centred near Timaru and Alexandra.

In the case of an occultation, the combined light of the asteroid and the star will drop by 6.50 mag to 15.80 mag (the magnitude of the asteroid) for at most 4.2 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, 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 :
 Occultation of TYC 7870-01197-1 by 2842 Unsold on 2017 Apr 16 
                   Centre              Star  Star   Sun     Path Limit1           Path Limit2           Error Limit1          Error Limit2       Alt
  E. Longitude    Latitude      U.T.    Alt   Az    Alt                                                                                          Crn
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "    o  '  "
                                                         Longitude  Latitude   Longitude  Latitude   Longitude  Latitude   Longitude  Latitude
    171 41  9   -35 10 31   16 54 55    79   248   -26  171 45 49  -35 10 44  171 36 29  -35 10 19  172 44 21  -35 13  0  170 38 11  -35  7 27   0.16
    171 22 27   -36 35 42   16 55 43    80   256   -26  171 27 12  -36 35 54  171 17 42  -36 35 29  172 26 47  -36 38 14  170 18 21  -36 32 33   0.16
    171  3 56   -38  0 46   16 56 31    80   264   -26  171  8 46  -38  0 58  170 59  5  -38  0 33  172  9 29  -38  3 21  169 58 38  -37 57 33   0.17
    170 45 36   -39 25 46   16 57 19    80   273   -26  170 50 32  -39 25 59  170 40 40  -39 25 33  171 52 27  -39 28 25  169 39  0  -39 22 30   0.17
    170 27 27   -40 50 47   16 58  7    80   281   -26  170 32 29  -40 51  0  170 22 25  -40 50 33  171 35 42  -40 53 29  169 19 28  -40 47 26   0.17

    170  9 29   -42 15 50   16 58 55    80   290   -25  170 14 38  -42 16  4  170  4 20  -42 15 36  171 19 15  -42 18 35  169  0  1  -42 12 25   0.18
    169 51 43   -43 40 59   16 59 43    79   297   -25  169 56 59  -43 41 13  169 46 27  -43 40 45  171  3  6  -43 43 48  168 40 38  -43 37 30   0.18
    169 34  8   -45  6 18   17  0 31    79   304   -25  169 39 32  -45  6 32  169 28 44  -45  6  4  170 47 16  -45  9 10  168 21 18  -45  2 45   0.18
    169 16 45   -46 31 50   17  1 18    78   310   -25  169 22 17  -46 32  4  169 11 13  -46 31 35  170 31 47  -46 34 45  168  2  3  -46 28 12   0.18
Uncertainty in time = +/- 28 secs

Prediction of 2017 Feb 24.0


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