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ASTROMETRIC UPDATE:
OCCULTATION BY (174) PHAEDRA - 2007 Sep 08

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2007 AUG 29, 00:57 UT

Event Rank : 59

(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.

Phaedra Update Map


On 2007 Sep 08 UT, the 69 km diameter asteroid (174) Phaedra will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across Australia from south-eastern Western Australia to southern Northern Territory at decreasing altitude.

In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 13.1 mag (the magnitude of the asteroid) for at most 5.6 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
    124 59 11   -33 44 11   16  9 15    23   247   -61  124 10 51  -33 51  7  125 48 40  -33 36 28  122 31 44  -34  3 30  127 37 42  -33 17 14
    125 52 10   -32 33 27   16  9 24    22   246   -62  125  2 47  -32 41 23  126 42 49  -32 24 38  123 21 49  -32 55 39  128 34 57  -32  2 41
    126 49 23   -31 20  4   16  9 32    21   245   -63  125 58 38  -31 29 13  127 41 35  -31  9 56  124 15 18  -31 45 41  129 37 47  -30 44 39
    127 51 42   -30  3 29   16  9 40    20   244   -64  126 59 11  -30 14  6  128 45 57  -29 51 43  125 12 45  -30 33 14  130 47 39  -29 22 12
    129  0 22   -28 42 54   16  9 48    18   243   -64  128  5 28  -28 55 21  129 57 23  -28 29  2  126 14 57  -29 17 45  132  6 45  -27 53 55

    130 17 13   -27 17  7   16  9 56    16   242   -65  129 19  1  -27 31 58  131 18  8  -27  0 26  127 23  1  -27 58 33  133 38 50  -26 17 23
    131 45 13   -25 44 13   16 10  4    14   242   -65  130 42 15  -26  2 27  132 52  0  -25 23 29  128 38 33  -26 34 34  135 31  8  -24 27 59
    133 29 45   -24  0 48   16 10 12    12   241   -66  132 19 13  -24 24  9  134 46 24  -23 33 28  130  4  4  -25  4 13  138  2 25  -22 13 50
    135 42 44   -21 59 17   16 10 20     9   240   -66  134 18  2  -22 31 56  137 20 32  -21 18 13  131 43 52  -23 24 44  143 54 21  -17 52 55
    139  6 58   -19 12 40   16 10 28     5   238   -64  137  0 44  -20 11 54  ... .. ..   .. .. ..  133 46 46  -21 30 33  ... .. ..   .. .. ..



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