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ASTROMETRIC UPDATE:
OCCULTATION BY (227) PHILOSOPHIA - 2008 JAN 15

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2008 JAN 11, 02:18 UT

Event Rank : 16

(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.

Philosophia Update Map


On 2008 Jan 15 UT, the 87 km diameter asteroid (227) Philosophia will occult a 9.8 mag star in the constellation Auriga for observers along a wide and very large uncertainty path across south-eastern Australia, centered over eastern Victoria.

In the case of an occultation, the combined light of the asteroid and the star will drop by 4.2 mag to 13.9 mag (the magnitude of the asteroid) for at most 6.2 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, 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  '  "
                                                        Longitude  Longitude  Longitude  Longitude
    137 36 54   -45  0  0   12  3 51    10    18   -13  136  5 20  139 11 26  ... .. ..  156 10 26
    138 44 51   -44  0  0   12  3 47    11    17   -14  137 12 42  140 20  6  ... .. ..  157 43 56
    139 55 55   -43  0  0   12  3 43    12    16   -15  138 22 57  141 32 10  ... .. ..  159 28 49
    141 10 23   -42  0  0   12  3 38    14    15   -17  139 36 21  142 47 57  ... .. ..  161 28 20
    142 28 33   -41  0  0   12  3 32    15    14   -18  140 53  7  144  7 47  ... .. ..  163 48  4

    143 50 47   -40  0  0   12  3 25    16    13   -20  142 13 37  145 32  7  ... .. ..  166 39 14
    145 17 34   -39  0  0   12  3 18    17    12   -21  143 38 13  147  1 31  ... .. ..  170 32 58
    146 49 28   -38  0  0   12  3 10    18    11   -23  145  7 26  148 36 40  ... .. ..  ... .. ..
    148 27 14   -37  0  0   12  3  1    20    10   -24  146 41 51  150 18 30  ... .. ..  ... .. ..
    150 11 50   -36  0  0   12  2 51    21     8   -26  148 22 17  152  8 15  ... .. ..  ... .. ..

    152  4 34   -35  0  0   12  2 40    22     7   -27  150  9 44  154  7 38  136 59 49  ... .. ..
    154  7 16   -34  0  0   12  2 27    23     5   -29  152  5 36  156 19  9  138 29 22  ... .. ..
    155  0  0   -33 35 52   12  2 22    24     4   -30  -32 38 33  -34 35 21  -25 32  7  -45 49 48
    156  0  0   -33  9 35   12  2 15    24     3   -30  -32 12 55  -34  8 21  -25 10 11  -45  7  7
    157  0  0   -32 44 32   12  2  9    25     2   -31  -31 48 28  -33 42 38  -24 49 14  -44 27 23

    158  0  0   -32 20 43   12  2  2    25     1   -32  -31 25 13  -33 18 11  -24 29 15  -43 50 20
    159  0  0   -31 58  6   12  1 56    25     0   -33  -31  3  8  -32 54 59  -24 10 14  -43 15 46
    160  0  0   -31 36 40   12  1 49    26   360   -33  -30 42 11  -32 33  0  -23 52 11  -42 43 32
    161  0  0   -31 16 25   12  1 43    26   359   -34  -30 22 24  -32 12 15  -23 35  5  -42 13 28
    162  0  0   -30 57 20   12  1 36    26   358   -35  -30  3 44  -31 52 42  -23 18 55  -41 45 29

    163  0  0   -30 39 24   12  1 29    27   357   -35  -29 46 11  -31 34 20  -23  3 43  -41 19 28
    164  0  0   -30 22 36   12  1 22    27   356   -36  -29 29 45  -31 17  8  -22 49 27  -40 55 21
    165  0  0   -30  6 56   12  1 16    27   355   -36  -29 14 25  -31  1  7  -22 36  7  -40 33  3
    166  0  0   -29 52 24   12  1  9    27   354   -37  -29  0 11  -30 46 14  -22 23 44  -40 12 30
    167  0  0   -29 38 58   12  1  2    27   353   -37  -28 47  3  -30 32 30  -22 12 16  -39 53 40

    168  0  0   -29 26 39   12  0 55    27   352   -38  -28 34 59  -30 19 55  -22  1 44  -39 36 30
    169  0  0   -29 15 26   12  0 48    28   351   -38  -28 23 59  -30  8 26  -21 52  7  -39 20 57
    170  0  0   -29  5 18   12  0 41    28   350   -39  -28 14  4  -29 58  5  -21 43 26  -39  7  0
    171  0  0   -28 56 16   12  0 35    28   349   -39  -28  5 12  -29 48 51  -21 35 41  -38 54 36
    172  0  0   -28 48 19   12  0 28    28   349   -39  -27 57 24  -29 40 44  -21 28 50  -38 43 45

    173  0  0   -28 41 27   12  0 21    27   348   -39  -27 50 40  -29 33 43  -21 22 55  -38 34 25
    174  0  0   -28 35 39   12  0 14    27   347   -40  -27 44 59  -29 27 48  -21 17 55  -38 26 35
    175  0  0   -28 30 55   12  0  8    27   346   -40  -27 40 21  -29 22 58  -21 13 49  -38 20 13
    176  0  0   -28 27 16   12  0  1    27   345   -40  -27 36 45  -29 19 15  -21 10 39  -38 15 21
    177  0  0   -28 24 41   11 59 54    27   344   -40  -27 34 13  -29 16 37  -21  8 23  -38 11 56

    178  0  0   -28 23 11   11 59 48    27   343   -40  -27 32 44  -29 15  5  -21  7  3  -38 10  0
    179  0  0   -28 22 44   11 59 41    26   342   -40  -27 32 18  -29 14 38  -21  6 37  -38  9 31

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