Graze logo


ASTROMETRIC UPDATE:
OCCULTATION BY (281) LUCRETIA - 2008 Dec 12

[Detailed Finder Charts]


Updated:   2008 OCT 31, 21:38 UT

Event Rank : 29

(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.

Lucretia Update Map


On 2008 Dec 12 UT, the 12 km diameter asteroid (281) Lucretia will occult a 9.7 mag star in the constellation Gemini for observers along a narrow and uncertain path beginning south of Mackay and running north-west though central northern parts of Queensland. Then into the Northern Territory passing south of Darwin, before ending over Western Australia north-west of Kununurra.

In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 14.1 mag (the magnitude of the asteroid) for at most 1.6 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 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
    157 56 26   -27  0  0   15 18 31    31   353   -33  158  6  1  157 46 50  158 49 30  157  2 29
    156 24 19   -26  0  0   15 18 51    32   354   -34  156 34  6  156 14 30  157 18 30  155 29  9
    154 48 22   -25  0  0   15 19 13    33   356   -36  154 58 23  154 38 18  155 43 51  153 51 46
    153  8  5   -24  0  0   15 19 36    34   357   -37  153 18 24  152 57 44  154  5  8  152  9 49
    151 22 54   -23  0  0   15 20  0    35   359   -39  151 33 33  151 12 12  152 21 46  150 22 38

    149 32  3   -22  0  0   15 20 27    36     1   -40  149 43  6  149 20 57  150 33  7  148 29 23
    147 34 37   -21  0  0   15 20 55    37     3   -42  147 46 10  147 23  0  148 38 19  146 29  2
    145 29 20   -20  0  0   15 21 26    38     5   -44  145 41 29  145 17  6  146 36 18  144 20  8
                                                         Latitude   Latitude   Latitude   Latitude
    144  0  0   -19 19 43   15 21 48    39     6   -45  -19 14  8  -19 25 18  -18 48 46  -19 51  1
    143  0  0   -18 53 49   15 22  2    39     7   -46  -18 48 17  -18 59 21  -18 23  5  -19 24 53

    142  0  0   -18 28 50   15 22 17    39     8   -46  -18 23 20  -18 34 20  -17 58 19  -18 59 42
    141  0  0   -18  4 46   15 22 32    39     9   -47  -17 59 18  -18 10 14  -17 34 27  -18 35 25
    140  0  0   -17 41 37   15 22 47    40    11   -48  -17 36 11  -17 47  3  -17 11 30  -18 12  5
    139  0  0   -17 19 22   15 23  2    40    12   -48  -17 13 59  -17 24 46  -16 49 26  -17 49 39
    138  0  0   -16 58  2   15 23 16    40    13   -49  -16 52 40  -17  3 24  -16 28 16  -17 28  8

    137  0  0   -16 37 35   15 23 31    40    14   -49  -16 32 15  -16 42 55  -16  7 59  -17  7 31
    136  0  0   -16 18  2   15 23 46    40    15   -50  -16 12 44  -16 23 21  -15 48 35  -16 47 48
    135  0  0   -15 59 22   15 24  1    40    16   -50  -15 54  6  -16  4 39  -15 30  4  -16 28 59
    134  0  0   -15 41 36   15 24 15    40    17   -51  -15 36 21  -15 46 51  -15 12 25  -16 11  4
    133  0  0   -15 24 42   15 24 30    40    18   -51  -15 19 28  -15 29 56  -14 55 39  -15 54  2

    132  0  0   -15  8 41   15 24 45    40    19   -52  -15  3 28  -15 13 53  -14 39 45  -15 37 54
    131  0  0   -14 53 32   15 24 59    40    20   -52  -14 48 21  -14 58 43  -14 24 44  -15 22 38
    130  0  0   -14 39 15   15 25 14    40    21   -52  -14 34  5  -14 44 26  -14 10 33  -15  8 15
    129  0  0   -14 25 51   15 25 28    40    22   -52  -14 20 42  -14 31  0  -13 57 15  -14 54 44
    128  0  0   -14 13 18   15 25 43    40    23   -53  -14  8 10  -14 18 27  -13 44 48  -14 42  6

    127  0  0   -14  1 37   15 25 57    40    24   -53  -13 56 31  -14  6 45  -13 33 12  -14 30 20
    126  0  0   -13 50 48   15 26 11    39    25   -53  -13 45 42  -13 55 55  -13 22 27  -14 19 26
    125  0  0   -13 40 50   15 26 25    39    26   -53  -13 35 45  -13 45 56  -13 12 34  -14  9 24
    124  0  0   -13 31 44   15 26 39    39    27   -53  -13 26 40  -13 36 49  -13  3 31  -14  0 14
    123  0  0   -13 23 29   15 26 53    39    28   -53  -13 18 25  -13 28 34  -12 55 20  -13 51 55

    122  0  0   -13 16  5   15 27  7    38    29   -53  -13 11  2  -13 21  9  -12 47 59  -13 44 28
    121  0  0   -13  9 33   15 27 20    38    30   -53  -13  4 30  -13 14 36  -12 41 29  -13 37 53
    120  0  0   -13  3 51   15 27 34    38    31   -53  -12 58 49  -13  8 54  -12 35 49  -13 32 10
    119  0  0   -12 59  1   15 27 47    37    31   -53  -12 53 59  -13  4  4  -12 31  1  -13 27 18
    118  0  0   -12 55  2   15 28  1    37    32   -53  -12 50  0  -13  0  5  -12 27  3  -13 23 17

Uncertainty in time = +/- 7 secs

[Prediction of 2008 Oct 31.0]

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]