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ASTROMETRIC UPDATE:
OCCULTATION BY (199) BYBLIS - 2006 FEB 13

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2006 FEB 03, 23:20 UT

Event Rank : 67

(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.

Byblis Update Map


On 2006 Feb 13 UT, the 63 km diameter asteroid (199) Byblis will occult a 11.9 mag star in the constellation Cetus for observers along a path across central Australia from Eucla to Townsville.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.0 mag to 14.8 mag (the magnitude of the asteroid) for at most 3.2 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, 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
    125 20 56   -34  0  0   10 57 45    39   323    -6  126  4 52  124 37 29  127 24 21  123 21 17
    126 28  7   -33  0  0   10 57 53    39   321    -7  127 12 19  125 44 25  128 32 22  124 27 50
    127 37  3   -32  0  0   10 58  1    39   320    -8  128 21 37  126 53  1  129 42 22  125 35 56
    128 47 54   -31  0  0   10 58  9    40   318    -9  129 32 54  128  3 28  130 54 32  126 45 44
    130  0 51   -30  0  0   10 58 18    40   316   -11  130 46 23  129 15 56  132  9  5  127 57 24

    131 16  7   -29  0  0   10 58 26    39   314   -12  132  2 17  130 30 36  133 26 15  129 11  6
    132 33 55   -28  0  0   10 58 35    39   312   -14  133 20 51  131 47 41  134 46 19  130 27  4
    133 54 32   -27  0  0   10 58 44    39   310   -15  134 42 23  133  7 29  136  9 38  131 45 30
    135 18 19   -26  0  0   10 58 53    39   308   -17  136  7 13  134 30 16  137 36 35  133  6 42
    136 45 38   -25  0  0   10 59  2    38   306   -18  137 35 48  135 56 25  139  7 40  134 30 58

    138 16 57   -24  0  0   10 59 11    38   305   -20  139  8 37  137 26 21  140 43 29  135 58 41
    139 52 51   -23  0  0   10 59 21    37   303   -22  140 46 19  139  0 36  142 24 48  137 30 19
    141 34  4   -22  0  0   10 59 31    36   301   -24  142 29 42  140 39 50  144 12 35  139  6 24
    143 21 31   -21  0  0   10 59 41    35   299   -26  144 19 48  142 24 52  146  8  9  140 47 39
    145 16 25   -20  0  0   10 59 52    34   297   -28  146 18  1  144 16 47  148 13 18  142 34 56

    147 20 27   -19  0  0   11  0  3    33   295   -30  148 26 18  146 17  2  150 30 41  144 29 25
    148  0  0   -18 41 54   11  0  6    32   295   -31  -19 11 52  -18 12 16  -20  6  8  -17 20 20
    149  0  0   -18 15 22   11  0 11    31   294   -32  -18 45  7  -17 45 59  -19 38 55  -16 54 27
    150  0  0   -17 49 59   11  0 16    31   293   -33  -18 19 29  -17 20 48  -19 12 52  -16 29 39
    151  0  0   -17 25 43   11  0 21    30   292   -34  -17 55  0  -16 56 45  -18 47 59  -16  5 57

    152  0  0   -17  2 33   11  0 25    29   291   -35  -17 31 38  -16 33 47  -18 24 14  -15 43 19
    153  0  0   -16 40 30   11  0 30    28   291   -36  -17  9 23  -16 11 55  -18  1 37  -15 21 47

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