Graze logo


ASTROMETRIC UPDATE:
OCCULTATION BY (218) BIANCA - 2006 JUL 31

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2006 JUL 24, 22:52 UT

Event Rank : 91

(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.

Bianca Update Map


On 2006 Jul 31 UT, the 61 km diameter asteroid (218) Bianca will occult a 11.9 mag star in the constellation Aquarius for observers along a path across south-eastern Australia, beginning near Ulladulla on the New South Wales south coast, running across south-eastern New South Wales and near Sydney and Canberra, and across central Victoria, directly over Melbourne suburbs with the predicted shadow path centred over Port Phillip Bay, then passing over Geelong and finally leaving near Cape Otway.

In the case of an occultation, the combined light of the asteroid and the star will drop by only 0.8 mag to 12.0 mag (the magnitude of the asteroid) for at most 5.3 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, 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  '  "
                                                         Latitude   Latitude   Latitude   Latitude
    138  0  0   -41 40  1   13 24 56    44    34   -60  -41 19  0  -42  1  6  -40 57 37  -42 22 41
    139  0  0   -41 11 38   13 24 50    45    33   -61  -40 50 33  -41 32 47  -40 29  6  -41 54 26
    140  0  0   -40 42 45   13 24 43    46    32   -61  -40 21 36  -41  3 58  -40  0  5  -41 25 40
    141  0  0   -40 13 21   13 24 36    47    31   -62  -39 52  9  -40 34 38  -39 30 35  -40 56 24
    142  0  0   -39 43 28   13 24 30    48    30   -63  -39 22 12  -40  4 48  -39  0 35  -40 26 38

    143  0  0   -39 13  6   13 24 23    49    29   -64  -38 51 46  -39 34 29  -38 30  5  -39 56 22
    144  0  0   -38 42 14   13 24 15    49    28   -65  -38 20 51  -39  3 41  -37 59  7  -39 25 37
    145  0  0   -38 10 54   13 24  8    50    27   -66  -37 49 28  -38 32 23  -37 27 40  -38 54 23
    146  0  0   -37 39  5   13 24  1    51    25   -67  -37 17 36  -38  0 38  -36 55 45  -38 22 41
    147  0  0   -37  6 48   13 23 53    52    24   -68  -36 45 16  -37 28 24  -36 23 23  -37 50 30

    148  0  0   -36 34  4   13 23 45    53    23   -68  -36 12 30  -36 55 42  -35 50 33  -37 17 51
    149  0  0   -36  0 53   13 23 37    53    22   -69  -35 39 16  -36 22 34  -35 17 17  -36 44 46
    150  0  0   -35 27 16   13 23 29    54    21   -70  -35  5 37  -35 48 59  -34 43 35  -36 11 13
    151  0  0   -34 53 13   13 23 21    55    19   -71  -34 31 32  -35 14 59  -34  9 28  -35 37 15
    152  0  0   -34 18 46   13 23 12    56    18   -72  -33 57  2  -34 40 34  -33 34 57  -35  2 52

    153  0  0   -33 43 54   13 23  4    57    16   -73  -33 22  8  -34  5 44  -33  0  1  -34 28  4
    154  0  0   -33  8 39   13 22 55    57    15   -74  -32 46 52  -33 30 30  -32 24 42  -33 52 52
    155  0  0   -32 33  1   13 22 46    58    13   -75  -32 11 12  -32 54 54  -31 49  2  -33 17 18

Use these links for further information:
[Planetary Occultations] [Using the Predictions]
[Observing Details] [Timing Details] [Reporting Details] [Report Form]
[Asteroid Occultation Results]


[Site Map] [What's an Occultation?]
[Total Occultations] [Grazing Occultations] [Planetary Occultations] [Jovian Satellite Eclipses]
[Timing Occultations] [Reporting Observations] [Coming Events] [Software]
[About Us] [Publications] [Membership] [Links]

[Top of Page][Return to Home Page]