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ASTROMETRIC UPDATE:
OCCULTATION BY (855) NEWCOMBIA - 2007 MAY 30

[Detailed Finder Charts]


Updated:   2007 APR 21, 18:18 UT

Event Rank : 25

(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.

Newcombia Update Map


On 2007 May 30 UT, the 14 km diameter asteroid (855) Newcombia will occult a 10.2 mag star in the constellation Scorpius for observers along a narrow high uncertainty path first passing over Papua New Guinea just north of Port Moresby. Then into the Northern Territory, passing south of Katherine before moving into Western Australia passing near Lake Argyle, just south of Derby and ending near Broome.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.7 mag to 13.9 mag (the magnitude of the asteroid) for at most 2.1 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
    155  0  0   - 2  7 20   15 10 41    49   194   -60  - 2  1 53  - 2 12 46  - 1 32 28  - 2 41 57
    154  0  0   - 2 52 59   15 10 58    50   193   -61  - 2 47 35  - 2 58 23  - 2 18 27  - 3 27 18
    153  0  0   - 3 37 32   15 11 15    51   193   -62  - 3 32 11  - 3 42 52  - 3  3 18  - 4 11 31
    152  0  0   - 4 20 57   15 11 32    52   192   -64  - 4 15 39  - 4 26 15  - 3 47  2  - 4 54 39
    151  0  0   - 5  3 17   15 11 49    52   191   -65  - 4 58  2  - 5  8 32  - 4 29 40  - 5 36 41

    150  0  0   - 5 44 32   15 12  6    53   190   -66  - 5 39 19  - 5 49 44  - 5 11 12  - 6 17 39
    149  0  0   - 6 24 42   15 12 23    54   189   -67  - 6 19 32  - 6 29 51  - 5 51 39  - 6 57 32
    148  0  0   - 7  3 48   15 12 40    55   188   -68  - 6 58 40  - 7  8 55  - 6 31  2  - 7 36 22
    147  0  0   - 7 41 50   15 12 57    56   187   -69  - 7 36 46  - 7 46 55  - 7  9 20  - 8 14  9
    146  0  0   - 8 18 51   15 13 14    56   186   -70  - 8 13 48  - 8 23 53  - 7 46 35  - 8 50 54

    145  0  0   - 8 54 49   15 13 32    57   184   -71  - 8 49 48  - 8 59 49  - 8 22 48  - 9 26 38
    144  0  0   - 9 29 45   15 13 49    58   183   -72  - 9 24 47  - 9 34 43  - 8 58  0  -10  1 20
    143  0  0   -10  3 42   15 14  6    58   182   -73  - 9 58 46  -10  8 37  - 9 32 10  -10 35  3
    142  0  0   -10 36 38   15 14 22    59   181   -74  -10 31 45  -10 41 32  -10  5 20  -11  7 46
    141  0  0   -11  8 36   15 14 39    59   179   -75  -11  3 44  -11 13 27  -10 37 31  -11 39 31

    140  0  0   -11 39 35   15 14 56    60   178   -76  -11 34 45  -11 44 24  -11  8 42  -12 10 17
    139  0  0   -12  9 36   15 15 13    60   177   -77  -12  4 48  -12 14 23  -11 38 56  -12 40  7
    138  0  0   -12 38 40   15 15 30    61   175   -78  -12 33 54  -12 43 26  -12  8 12  -13  8 59
    137  0  0   -13  6 48   15 15 46    61   174   -79  -13  2  4  -13 11 32  -12 36 31  -13 36 56
    136  0  0   -13 34  0   15 16  3    61   172   -80  -13 29 18  -13 38 42  -13  3 54  -14  3 57

    135  0  0   -14  0 17   15 16 19    62   170   -81  -13 55 36  -14  4 58  -13 30 22  -14 30  4
    134  0  0   -14 25 40   15 16 36    62   169   -82  -14 21  1  -14 30 19  -13 55 55  -14 55 17
    133  0  0   -14 50  9   15 16 52    62   167   -82  -14 45 31  -14 54 46  -14 20 33  -15 19 36
    132  0  0   -15 13 45   15 17  8    62   166   -83  -15  9  8  -15 18 21  -14 44 19  -15 43  2
    131  0  0   -15 36 28   15 17 24    62   164   -84  -15 31 53  -15 41  3  -15  7 11  -16  5 37

    130  0  0   -15 58 19   15 17 40    62   163   -84  -15 53 46  -16  2 53  -15 29 11  -16 27 20
    129  0  0   -16 19 19   15 17 56    63   161   -84  -16 14 47  -16 23 51  -15 50 19  -16 48 11
    128  0  0   -16 39 28   15 18 12    63   159   -84  -16 34 57  -16 43 59  -16 10 36  -17  8 12
    127  0  0   -16 58 47   15 18 28    62   158   -84  -16 54 17  -17  3 16  -16 30  2  -17 27 23
    126  0  0   -17 17 15   15 18 43    62   156   -84  -17 12 47  -17 21 44  -16 48 38  -17 45 45

    125  0  0   -17 34 55   15 18 59    62   155   -84  -17 30 27  -17 39 22  -17  6 24  -18  3 17
    124  0  0   -17 51 45   15 19 14    62   153   -83  -17 47 19  -17 56 12  -17 23 22  -18 20  1
    123  0  0   -18  7 47   15 19 30    62   152   -83  -18  3 22  -18 12 13  -17 39 30  -18 35 57
    122  0  0   -18 23  1   15 19 45    62   150   -82  -18 18 37  -18 27 26  -17 54 50  -18 51  5
    121  0  0   -18 37 28   15 20  0    62   149   -81  -18 33  4  -18 41 51  -18  9 22  -19  5 26

    120  0  0   -18 51  7   15 20 15    61   148   -81  -18 46 44  -18 55 30  -18 23  6  -19 19  0
    119  0  0   -19  3 59   15 20 30    61   147   -80  -18 59 37  -19  8 21  -18 36  4  -19 31 48
    118  0  0   -19 16  5   15 20 45    61   145   -79  -19 11 44  -19 20 26  -18 48 14  -19 43 49
    117  0  0   -19 27 25   15 20 59    60   144   -78  -19 23  4  -19 31 45  -18 59 38  -19 55  4
    116  0  0   -19 37 58   15 21 14    60   143   -77  -19 33 38  -19 42 18  -19 10 16  -20  5 34

    115  0  0   -19 47 46   15 21 29    59   142   -77  -19 43 27  -19 52  5  -19 20  7  -20 15 18
    114  0  0   -19 56 49   15 21 43    59   141   -76  -19 52 30  -20  1  7  -19 29 13  -20 24 17
    113  0  0   -20  5  6   15 21 57    59   140   -75  -20  0 47  -20  9 24  -19 37 34  -20 32 31
    112  0  0   -20 12 38   15 22 11    58   139   -74  -20  8 20  -20 16 56  -19 45  9  -20 40  1
    111  0  0   -20 19 26   15 22 25    58   138   -73  -20 15  8  -20 23 44  -19 51 59  -20 46 46

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