RASNZ Occultation Section - Palma Occultation Update

ASTROMETRIC UPDATE:
OCCULTATION BY (372) PALMA - 2004 SEP 08

[Edwin Goffin's Prediction + Finder Charts]

UPDATE: 2004 AUG 09, 15:59 UT

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 the time for your location)

On 2004 Sep 08 UT, the 188 km diameter asteroid (372) Palma will occult a 9.7 mag star in the constellation Corona Australis for observers along a path across Australia, Indonesia, Taiwan, China.

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 13.6 mag (the magnitude of the asteroid) for at most 17.4 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, 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 :

Event Rank : 97
(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).
Date and approx. UT time of event : 2004 Sep 08, 12:03 - 2004 Sep 08, 12:21 UT
(Refer to map(s) for your own location)
Magnitude of target star : 9.7
Magnitude drop [mag] : 3.9
Estimated maximum duration [s] : 17.4
Phase of moon, angular distance : 33 % sunlit, 169° distance
Sun : 115° distance
Rough path description : Australia, Indonesia, Taiwan, China

Data for the target star :

Name : TYC 7916-00280-1
Constellation : Corona Australis
J2000 position with proper motion to date of event [h,m,s ; °,',"]: RA: 18 57 47.0578 DE: -38 02 14.762
Position source : Pos: UCAC2, pm: UCAC2, pi:
Standard error : RA,DE ["]: ( .017, .017 )
V mag [mag] : 9.7
B mag [mag] : 11.1
Remarks : (none)

Data for the minor planet :

Number, name : (372) Palma
Approx. diameter [km] : 188
Approx. diameter [arcsec] : .080
Distance from Earth [AU] : 3.25600
Source of used astrometry : FASTT MPC (via Astdys)
Number of used observations : 432
Number of rejected observations : 29
Time covered by the observations : 1904 Aug 04 - 2004 Aug 04
1 sigma uncertainty ellipse (major, minor, PA) : 0.026, 0.018, 84°
Remarks : (none)
Orbital Elements for (372) Palma :
Update computed by : Steve Preston, Medina, Washington, USA. (OrbFit).

The Occultation Path :

Approximate projected width [km] : 196
Uncertainty interval [path widths] : +/- 0.38 (1 sigma)
Uncertainty interval [seconds] : +/- 5.5 (1 sigma)
Uncertainty interval approx RA,DE ["] : (+/- .031 +/- .025) (1 sigma)
Uncertainty ellipse (major, minor, PA) : ( .031", .025", 86° ) (1 sigma)
Approx speed of asteroid's shadow [km/s]: 10.7894
Important Note regarding Accuracy:
The uncertainty interval in path widths given above (and shown as a 1-sigma uncertainty ellipse on the plot) refers to RMS deviation and is applied as a +/- range. In other words, a path uncertainty of 1.0 path widths means that the actual center of the asteroid's shadow path should fall within plus or minus 1 path width of the plotted path center. However path errors larger than 1 sigma have been observed so observers should be alert for primary occultations within plus or minus 3 sigma of the updated path.
Further, almost all asteroidal satellites discovered so far have been found within 10 diameters of the asteroid (since this distance is deep enough within the gravitational well to be stable over long timescales). Therefore, if monitoring for secondary events, observing out to about 10 path-widths either side of the predicted track remains worthwhile.
We therefore recommend that you monitor for events if your observing location is up to +/- 10 path-widths from the predicted track. If not monitoring for occultations by secondary bodies you should observe from locations within 3 sigma of the nominal path.
In terms of time, the predictions are now usually accurate to about +/- 0.3 minute so you should be most attentive during the predicted minute of the event. However if intending to catch a potential satellite occultation you should start observing at least 10 times the predicted central duration before the predicted closest approach time for your location, and continue for a similar period afterwards.
Path Co-ordinates :

                  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
    124 49 56    51  0  0   12 21 57     0   191   -20  126 16 28  123 24  9  127 22 47  122 19 26
    124 32 38    50  0  0   12 21 57     1   191   -20  125 57 13  123  8 46  127  2  1  122  5 29
    124 16 37    49  0  0   12 21 57     2   190   -21  125 39 21  122 54 33  126 42 44  121 52 36
    124  1 47    48  0  0   12 21 56     3   190   -21  125 22 47  122 41 25  126 24 49  121 40 44
    123 48  3    47  0  0   12 21 56     4   190   -22  125  7 26  122 29 17  126  8 12  121 29 48

    123 35 22    46  0  0   12 21 55     5   190   -22  124 53 13  122 18  6  125 52 47  121 19 45
    123 23 39    45  0  0   12 21 54     6   190   -22  124 40  3  122  7 49  125 38 30  121 10 31
    123 12 51    44  0  0   12 21 52     7   190   -23  124 27 53  121 58 22  125 25 16  121  2  4
    123  2 55    43  0  0   12 21 51     8   189   -23  124 16 39  121 49 42  125 13  3  120 54 22
    122 53 48    42  0  0   12 21 49     9   189   -24  124  6 18  121 41 47  125  1 45  120 47 21

    122 45 27    41  0  0   12 21 47    10   189   -24  123 56 48  121 34 35  124 51 21  120 41  0
    122 37 51    40  0  0   12 21 45    11   189   -25  123 48  5  121 28  3  124 41 47  120 35 17
    122 30 55    39  0  0   12 21 43    12   189   -25  123 40  7  121 22 10  124 33  1  120 30 10
    122 24 40    38  0  0   12 21 41    13   189   -25  123 32 53  121 16 53  124 25  1  120 25 37
    122 19  3    37  0  0   12 21 38    14   189   -26  123 26 19  121 12 11  124 17 44  120 21 36

    122 14  1    36  0  0   12 21 35    15   189   -26  123 20 24  121  8  2  124 11  8  120 18  7
    122  9 35    35  0  0   12 21 33    16   189   -27  123 15  7  121  4 25  124  5 12  120 15  8
    122  5 42    34  0  0   12 21 29    17   189   -27  123 10 26  121  1 20  123 59 54  120 12 38
    122  2 21    33  0  0   12 21 26    18   189   -28  123  6 19  120 58 43  123 55 12  120 10 36
    121 59 30    32  0  0   12 21 23    19   189   -28  123  2 46  120 56 36  123 51  5  120  9  0

    121 57 10    31  0  0   12 21 19    20   189   -28  122 59 44  120 54 55  123 47 32  120  7 50
    121 55 18    30  0  0   12 21 15    21   189   -29  122 57 13  120 53 42  123 44 31  120  7  6
    121 53 53    29  0  0   12 21 11    22   189   -29  122 55 12  120 52 54  123 42  2  120  6 45
    121 52 56    28  0  0   12 21  7    23   189   -30  122 53 40  120 52 31  123 40  3  120  6 48
    121 52 25    27  0  0   12 21  3    24   189   -30  122 52 35  120 52 32  123 38 33  120  7 14

    121 52 19    26  0  0   12 20 58    25   189   -30  122 51 58  120 52 57  123 37 32  120  8  2
    121 52 37    25  0  0   12 20 54    26   189   -31  122 51 48  120 53 45  123 36 59  120  9 12
    121 53 20    24  0  0   12 20 49    27   189   -31  122 52  3  120 54 56  123 36 52  120 10 44
    121 54 27    23  0  0   12 20 44    28   189   -32  122 52 43  120 56 28  123 37 12  120 12 36
    121 55 56    22  0  0   12 20 39    29   189   -32  122 53 47  120 58 22  123 37 58  120 14 48

    121 57 48    21  0  0   12 20 33    30   190   -32  122 55 16  121  0 38  123 39  9  120 17 21
    122  0  3    20  0  0   12 20 28    31   190   -33  122 57  9  121  3 13  123 40 45  120 20 13
    122  2 39    19  0  0   12 20 22    32   190   -33  122 59 24  121  6 10  123 42 45  120 23 25
    122  5 36    18  0  0   12 20 16    33   190   -33  123  2  3  121  9 26  123 45  8  120 26 55
    122  8 55    17  0  0   12 20 11    34   190   -34  123  5  4  121 13  2  123 47 56  120 30 45

    122 12 34    16  0  0   12 20  4    35   190   -34  123  8 27  121 16 58  123 51  6  120 34 53
    122 16 35    15  0  0   12 19 58    36   190   -34  123 12 12  121 21 14  123 54 40  120 39 20
    122 20 55    14  0  0   12 19 52    37   191   -35  123 16 19  121 25 48  123 58 36  120 44  5
    122 25 36    13  0  0   12 19 45    38   191   -35  123 20 47  121 30 42  124  2 54  120 49  8
    122 30 37    12  0  0   12 19 39    39   191   -35  123 25 37  121 35 55  124  7 35  120 54 30

    122 35 59    11  0  0   12 19 32    40   191   -36  123 30 47  121 41 26  124 12 38  121  0  9
    122 41 40    10  0  0   12 19 25    41   191   -36  123 36 19  121 47 17  124 18  3  121  6  7
    122 47 41     9  0  0   12 19 18    42   192   -36  123 42 13  121 53 26  124 23 50  121 12 22
    122 54  3     8  0  0   12 19 11    43   192   -37  123 48 27  121 59 54  124 29 59  121 18 56
    123  0 44     7  0  0   12 19  3    44   192   -37  123 55  2  122  6 41  124 36 30  121 25 47

    123  7 45     6  0  0   12 18 56    45   192   -37  124  1 59  122 13 47  124 43 23  121 32 57
    123 15  6     5  0  0   12 18 48    46   193   -38  124  9 16  122 21 13  124 50 38  121 40 25
    123 22 48     4  0  0   12 18 40    47   193   -38  124 16 55  122 28 57  124 58 15  121 48 11
    123 30 50     3  0  0   12 18 32    48   193   -38  124 24 56  122 37  0  125  6 14  121 56 16
    123 39 12     2  0  0   12 18 24    49   194   -38  124 33 18  122 45 23  125 14 36  122  4 39

    123 47 55     1  0  0   12 18 16    49   194   -39  124 42  1  122 54  6  125 23 20  122 13 21
    123 56 59     0  0  0   12 18  8    50   195   -39  124 51  7  123  3  8  125 32 27  122 22 23
    124  6 24   - 1  0  0   12 18  0    51   195   -39  125  0 35  123 12 30  125 41 57  122 31 43
    124 16 11   - 2  0  0   12 17 51    52   196   -39  125 10 25  123 22 13  125 51 51  122 41 23
    124 26 19   - 3  0  0   12 17 42    53   196   -40  125 20 39  123 32 16  126  2  8  122 51 23

    124 36 49   - 4  0  0   12 17 34    54   197   -40  125 31 15  123 42 41  126 12 49  123  1 43
    124 47 42   - 5  0  0   12 17 25    55   197   -40  125 42 15  123 53 27  126 23 55  123 12 23
    124 58 58   - 6  0  0   12 17 16    56   198   -40  125 53 40  124  4 34  126 35 26  123 23 25
    125 10 37   - 7  0  0   12 17  7    57   199   -40  126  5 28  124 16  4  126 47 22  123 34 47
    125 22 40   - 8  0  0   12 16 58    58   199   -41  126 17 42  124 27 56  126 59 45  123 46 32

    125 35  8   - 9  0  0   12 16 49    59   200   -41  126 30 22  124 40 12  127 12 33  123 58 39
    125 48  0   -10  0  0   12 16 39    59   201   -41  126 43 27  124 52 51  127 25 49  124 11  9
    126  1 18   -11  0  0   12 16 30    60   202   -41  126 57  0  125  5 55  127 39 33  124 24  2
    126 15  2   -12  0  0   12 16 20    61   203   -41  127 11  0  125 19 24  127 53 46  124 37 20
    126 29 14   -13  0  0   12 16 11    62   204   -41  127 25 29  125 33 19  128  8 28  124 51  2

    126 43 53   -14  0  0   12 16  1    63   205   -41  127 40 26  125 47 40  128 23 40  125  5  9
    126 59  1   -15  0  0   12 15 51    64   206   -41  127 55 54  126  2 29  128 39 23  125 19 43
    127 14 39   -16  0  0   12 15 41    64   207   -42  128 11 53  126 17 45  128 55 39  125 34 44
    127 30 47   -17  0  0   12 15 32    65   209   -42  128 28 24  126 33 31  129 12 27  125 50 14
    127 47 26   -18  0  0   12 15 21    66   210   -42  128 45 28  126 49 47  129 29 51  126  6 12

    128  4 39   -19  0  0   12 15 11    67   212   -42  129  3  7  127  6 34  129 47 49  126 22 40
    128 22 25   -20  0  0   12 15  1    67   213   -42  129 21 21  127 23 53  130  6 25  126 39 39
    128 40 47   -21  0  0   12 14 51    68   215   -42  129 40 13  127 41 46  130 25 40  126 57 10
    128 59 46   -22  0  0   12 14 41    69   217   -42  129 59 42  128  0 14  130 45 34  127 15 15
    129 19 22   -23  0  0   12 14 30    69   219   -42  130 19 52  128 19 18  131  6 10  127 33 55

    129 39 39   -24  0  0   12 14 20    70   221   -42  130 40 44  128 39  0  131 27 29  127 53 12
    130  0 37   -25  0  0   12 14  9    70   223   -42  131  2 19  128 59 22  131 49 33  128 13  6
    130 22 18   -26  0  0   12 13 59    71   226   -42  131 24 41  129 20 24  132 12 25  128 33 40
    130 44 45   -27  0  0   12 13 48    71   228   -42  131 47 49  129 42 10  132 36  7  128 54 56
    131  7 59   -28  0  0   12 13 38    72   231   -42  132 11 48  130  4 42  133  0 40  129 16 55

    131 32  4   -29  0  0   12 13 27    72   234   -42  132 36 40  130 28  0  133 26  8  129 39 40
    131 57  1   -30  0  0   12 13 16    72   237   -42  133  2 27  130 52  9  133 52 34  130  3 12
    132 22 53   -31  0  0   12 13  5    73   240   -42  133 29 12  131 17 10  134 20  0  130 27 35
    132 49 44   -32  0  0   12 12 54    73   243   -42  133 56 58  131 43  6  134 48 30  130 52 51
    133 17 36   -33  0  0   12 12 44    73   247   -42  134 25 50  132 10  1  135 18  8  131 19  3

    133 46 33   -34  0  0   12 12 33    73   250   -41  134 55 50  132 37 57  135 48 57  131 46 14
    134 16 39   -35  0  0   12 12 22    73   253   -41  135 27  2  133  6 58  136 21  2  132 14 28

                                                         Latitude   Latitude   Latitude   Latitude
    135  0  0   -36 22 25   12 12  6    73   257   -41  -34  8 10  -38 33 18  -32 23 33  -40 10 49
    136  0  0   -38  9 20   12 11 47    72   263   -41  -36  0 50  -40 14 54  -34 20 56  -41 48 36
    137  0  0   -39 48 44   12 11 28    72   268   -41  -37 45 23  -41 49 28  -36  9 42  -43 19 42
    138  0  0   -41 21 19   12 11 11    71   272   -40  -39 22 40  -43 17 40  -37 50 46  -44 44 44
    139  0  0   -42 47 46   12 10 55    70   275   -40  -40 53 23  -44 40  5  -39 24 55  -46  4 14

    140  0  0   -44  8 37   12 10 39    69   278   -40  -42 18  8  -45 57 14  -40 52 48  -47 18 41
    141  0  0   -45 24 22   12 10 25    68   280   -39  -43 37 29  -47  9 34  -42 15  0  -48 28 31
    142  0  0   -46 35 27   12 10 11    68   282   -39  -44 51 53  -48 17 29  -43 32  3  -49 34  7
    143  0  0   -47 42 15   12  9 59    67   284   -39  -46  1 45  -49 21 21  -44 44 21  -50 35 49
    144  0  0   -48 45  7   12  9 47    66   285   -39  -47  7 28  -50 21 28  -45 52 19  -51 33 55

    145  0  0   -49 44 20   12  9 35    65   286   -38  -48  9 21  -51 18  8  -46 56 17  -52 28 42
    146  0  0   -50 40 12   12  9 24    64   287   -38  -49  7 42  -52 11 37  -47 56 35  -53 20 25
    147  0  0   -51 32 58   12  9 14    63   287   -38  -50  2 46  -53  2  8  -48 53 29  -54  9 16
    148  0  0   -52 22 50   12  9  4    62   288   -37  -50 54 49  -53 49 54  -49 47 14  -54 55 29
    149  0  0   -53 10  1   12  8 55    62   288   -37  -51 44  2  -54 35  6  -50 38  3  -55 39 13

    150  0  0   -53 54 41   12  8 46    61   288   -37  -52 30 38  -55 17 55  -51 26  9  -56 20 39
    151  0  0   -54 37  2   12  8 37    60   288   -37  -53 14 47  -55 58 30  -52 11 42  -56 59 56
    152  0  0   -55 17 12   12  8 29    59   288   -36  -53 56 39  -56 37  0  -52 54 54  -57 37 12
    153  0  0   -55 55 19   12  8 22    59   288   -36  -54 36 22  -57 13 33  -53 35 52  -58 12 35
    154  0  0   -56 31 31   12  8 14    58   288   -36  -55 14  5  -57 48 16  -54 14 46  -58 46 12

    155  0  0   -57  5 55   12  8  7    57   288   -35  -55 49 55  -58 21 16  -54 51 43  -59 18  9
    156  0  0   -57 38 37   12  8  0    57   288   -35  -56 23 59  -58 52 38  -55 26 50  -59 48 32
    157  0  0   -58  9 43   12  7 54    56   287   -35  -56 56 23  -59 22 29  -56  0 14  -60 17 26
    158  0  0   -58 39 19   12  7 47    55   287   -35  -57 27 12  -59 50 53  -56 32  0  -60 44 56
    159  0  0   -59  7 29   12  7 41    55   287   -35  -57 56 32  -60 17 55  -57  2 13  -61 11  8

    160  0  0   -59 34 19   12  7 35    54   286   -34  -58 24 27  -60 43 40  -57 31  0  -61 36  4
    161  0  0   -59 59 52   12  7 30    54   286   -34  -58 51  3  -61  8 12  -57 58 24  -61 59 50
    162  0  0   -60 24 12   12  7 24    53   285   -34  -59 16 22  -61 31 34  -58 24 30  -62 22 28
    163  0  0   -60 47 23   12  7 19    52   285   -34  -59 40 30  -61 53 49  -58 49 21  -62 44  2
    164  0  0   -61  9 29   12  7 14    52   284   -33  -60  3 30  -62 15  2  -59 13  2  -63  4 36

    165  0  0   -61 30 32   12  7  9    51   284   -33  -60 25 24  -62 35 15  -59 35 36  -63 24 11
    166  0  0   -61 50 35   12  7  4    51   283   -33  -60 46 16  -62 54 31  -59 57  5  -63 42 51
    167  0  0   -62  9 42   12  6 59    50   282   -33  -61  6  9  -63 12 52  -60 17 34  -64  0 38
    168  0  0   -62 27 54   12  6 55    50   282   -33  -61 25  5  -63 30 21  -60 37  4  -64 17 34
    169  0  0   -62 45 14   12  6 50    49   281   -32  -61 43  6  -63 47  0  -60 55 38  -64 33 43

    170  0  0   -63  1 44   12  6 46    49   281   -32  -62  0 16  -64  2 51  -61 13 18  -64 49  5
    171  0  0   -63 17 27   12  6 42    48   280   -32  -62 16 36  -64 17 56  -61 30  7  -65  3 42
    172  0  0   -63 32 23   12  6 38    48   279   -32  -62 32  8  -64 32 18  -61 46  7  -65 17 37
    173  0  0   -63 46 35   12  6 34    47   279   -32  -62 46 54  -64 45 56  -62  1 19  -65 30 50
    174  0  0   -64  0  5   12  6 30    47   278   -31  -63  0 56  -64 58 54  -62 15 45  -65 43 24

    175  0  0   -64 12 53   12  6 26    46   277   -31  -63 14 15  -65 11 12  -62 29 28  -65 55 20
    176  0  0   -64 25  2   12  6 22    46   276   -31  -63 26 53  -65 22 53  -62 42 28  -66  6 39
    177  0  0   -64 36 33   12  6 19    46   276   -31  -63 38 51  -65 33 56  -62 54 47  -66 17 22
    178  0  0   -64 47 26   12  6 15    45   275   -31  -63 50 10  -65 44 24  -63  6 26  -66 27 30
    179  0  0   -64 57 43   12  6 12    45   274   -31  -64  0 52  -65 54 17  -63 17 26  -66 37  6

    180  0  0   -65  7 26   12  6  8    44   273   -30  -64 10 57  -66  3 37  -63 27 50  -66 46  9

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]