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ASTROMETRIC UPDATE:
OCCULTATION BY (339) DOROTHEA - 2008 Nov 04

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2008 OCT 30, 13:55 UT

Event Rank : 47

(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.

Dorothea Update Map


On 2008 Nov 04 UT, the 38 km diameter asteroid (339) Dorothea will occult a 8.8 mag star in the constellation Monoceros for observers along a narrow path across eastern Australia from Nelson Bay in New South Wales to Hervey Bay in Queensland. Brisbane is inside, and Sydney just outside, the one sigma limit.

In the case of an occultation, the combined light of the asteroid and the star will drop by 5.8 mag to 14.6 mag (the magnitude of the asteroid) for at most 8.7 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 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
    151 23 57   -43  0  0   17 20  7    36    11   -12  151  9 45  151 38  7  150 30 49  152 16 56
    151 30  9   -42  0  0   17 19 52    37    11   -13  151 16 12  151 44  7  150 37 53  152 22 18
    151 36  5   -41  0  0   17 19 36    38    11   -14  151 22 20  151 49 49  150 44 37  152 27 25

    151 41 45   -40  0  0   17 19 20    39    11   -14  151 28 12  151 55 17  150 51  3  152 32 19
    151 47  9   -39  0  0   17 19  4    40    11   -15  151 33 48  152  0 29  150 57 11  152 37  0
    151 52 19   -38  0  0   17 18 47    41    11   -15  151 39  9  152  5 28  151  3  2  152 41 28
    151 57 15   -37  0  0   17 18 30    42    12   -16  151 44 16  152 10 14  151  8 38  152 45 45
    152  1 58   -36  0  0   17 18 13    43    12   -16  151 49  9  152 14 47  151 13 59  152 49 51

    152  6 29   -35  0  0   17 17 56    44    12   -17  151 53 50  152 19  9  151 19  6  152 53 47
    152 10 49   -34  0  0   17 17 38    45    12   -17  151 58 18  152 23 19  151 23 59  152 57 32
    152 14 56   -33  0  0   17 17 19    46    12   -18  152  2 34  152 27 18  151 28 39  153  1  8
    152 18 53   -32  0  0   17 17  1    47    13   -19  152  6 40  152 31  7  151 33  7  153  4 34
    152 22 40   -31  0  0   17 16 42    48    13   -19  152 10 34  152 34 45  151 37 22  153  7 52

    152 26 16   -30  0  0   17 16 23    49    13   -20  152 14 17  152 38 14  151 41 26  153 11  0
    152 29 43   -29  0  0   17 16  4    50    13   -20  152 17 51  152 41 34  151 45 19  153 14  1
    152 33  0   -28  0  0   17 15 44    51    14   -21  152 21 15  152 44 44  151 49  1  153 16 53
    152 36  7   -27  0  0   17 15 24    52    14   -21  152 24 29  152 47 45  151 52 32  153 19 37
    152 39  6   -26  0  0   17 15  4    53    15   -22  152 27 33  152 50 38  151 55 53  153 22 13

    152 41 55   -25  0  0   17 14 43    54    15   -22  152 30 28  152 53 22  151 59  4  153 24 41
    152 44 36   -24  0  0   17 14 23    55    15   -23  152 33 14  152 55 57  152  2  5  153 27  2
    152 47  8   -23  0  0   17 14  2    55    16   -24  152 35 51  152 58 24  152  4 56  153 29 15
    152 49 31   -22  0  0   17 13 40    56    16   -24  152 38 20  153  0 43  152  7 37  153 31 21
    152 51 46   -21  0  0   17 13 19    57    17   -25  152 40 39  153  2 53  152 10  9  153 33 19

    152 53 52   -20  0  0   17 12 57    58    17   -25  152 42 49  153  4 55  152 12 31  153 35  9

Uncertainty in time = +/- 12 secs

[Prediction of 2008 Oct 30.0]

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