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Updated: 2008 MAR 31, 04:16 UT
Event Rank : 0
(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.
On 2008 May 08 UT, the 163 km diameter asteroid (0) 2003 LD9 will occult a 13.6 mag star in the constellation Ophiuchus for observers along a path across Antarctica, possbily New Zealand, Australia. This is a TNO event of high uncertainty with the latest predictions placing the path south of Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 9.2 mag to 22.8 mag (the magnitude of the asteroid) for at most 7.8 seconds.
This update is based on 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 :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.
Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2
E. Longitude Latitude U.T. Alt Az Alt
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
- 78 47 31 -65 8 19 16 5 21 3 223 7 ... .. .. .. .. .. - 91 44 25 -69 8 31 ... .. .. .. .. .. 177 29 57 -35 40 48
- 84 34 37 -68 15 41 16 5 25 6 228 3 ... .. .. .. .. .. - 95 3 32 -70 38 33 ... .. .. .. .. .. 176 31 59 -35 42 37
- 88 18 8 -70 11 6 16 5 29 9 232 1 - 72 23 56 -64 16 49 - 98 6 1 -71 56 16 ... .. .. .. .. .. 175 34 23 -35 44 7
- 91 26 24 -71 43 43 16 5 32 10 235 -1 - 80 12 27 -68 52 30 -100 59 59 -73 5 47 ... .. .. .. .. .. 174 37 8 -35 45 19
- 94 18 5 -73 3 46 16 5 36 12 238 -3 - 83 48 42 -70 56 52 -103 50 8 -74 9 13 ... .. .. .. .. .. 173 40 13 -35 46 13
- 97 1 23 -74 15 31 16 5 40 13 240 -4 - 86 44 5 -72 34 32 -106 39 43 -75 7 55 ... .. .. .. .. .. 172 43 38 -35 46 50
- 99 41 3 -75 21 12 16 5 43 14 243 -5 - 89 20 40 -73 58 20 -109 31 13 -76 2 41 ... .. .. .. .. .. 171 47 21 -35 47 10
-102 20 28 -76 22 10 16 5 47 15 246 -7 - 91 47 23 -75 13 17 -112 26 50 -76 54 6 ... .. .. .. .. .. 170 51 23 -35 47 12
-105 2 22 -77 19 17 16 5 51 16 249 -8 - 94 9 15 -76 21 55 -115 28 36 -77 42 32 ... .. .. .. .. .. 169 55 42 -35 46 58
-107 49 14 -78 13 8 16 5 54 17 251 -9 - 96 29 42 -77 25 44 -118 38 33 -78 28 15 ... .. .. .. .. .. 169 0 18 -35 46 28
-110 43 36 -79 4 7 16 5 58 18 254 -10 - 98 51 33 -78 25 42 -121 58 47 -79 11 25 ... .. .. .. .. .. 168 5 11 -35 45 41
-113 48 8 -79 52 30 16 6 2 19 258 -11 -101 17 27 -79 22 29 -125 31 30 -79 52 7 ... .. .. .. .. .. 167 10 21 -35 44 39
-117 5 52 -80 38 28 16 6 5 19 261 -12 -103 50 10 -80 16 32 -129 19 2 -80 30 22 ... .. .. .. .. .. 166 15 46 -35 43 20
-120 40 20 -81 22 3 16 6 9 20 265 -13 -106 32 52 -81 8 10 -133 23 52 -81 6 7 ... .. .. .. .. .. 165 21 26 -35 41 47
-124 35 37 -82 3 17 16 6 13 21 269 -13 -109 29 27 -81 57 35 -137 48 32 -81 39 15 ... .. .. .. .. .. 164 27 21 -35 39 58
-128 56 36 -82 42 3 16 6 16 21 274 -14 -112 44 54 -82 44 55 -142 35 26 -82 9 36 ... .. .. .. .. .. 163 33 30 -35 37 54
-133 48 54 -83 18 9 16 6 20 22 279 -15 -116 25 50 -83 30 10 -147 46 43 -82 36 58 ... .. .. .. .. .. 162 39 54 -35 35 35
-139 18 47 -83 51 18 16 6 24 22 284 -16 -120 41 19 -84 13 17 -153 23 47 -83 1 4 ... .. .. .. .. .. 161 46 30 -35 33 2
-145 32 46 -84 21 4 16 6 27 23 291 -16 -125 43 54 -84 54 1 -159 26 54 -83 21 36 ... .. .. .. .. .. 160 53 20 -35 30 14
-152 36 24 -84 46 55 16 6 31 23 298 -17 -131 51 1 -85 31 57 -165 54 34 -83 38 14 ... .. .. .. .. .. 160 0 23 -35 27 11
-160 32 27 -85 8 9 16 6 35 23 306 -18 -139 26 13 -86 6 21 -172 43 7 -83 50 43 ... .. .. .. .. .. 159 7 39 -35 23 55
-169 18 8 -85 24 5 16 6 38 24 315 -19 -148 58 8 -86 36 4 -179 46 36 -83 58 47 ... .. .. .. .. .. 158 15 6 -35 20 24
-178 42 34 -85 34 4 16 6 42 24 325 -19 -160 52 15 -86 59 21 173 2 59 -84 2 21 ... .. .. .. .. .. 157 22 45 -35 16 39
171 33 38 -85 37 42 16 6 46 24 335 -20 -175 7 42 -87 14 5 165 54 37 -84 1 27 ... .. .. .. .. .. 156 30 36 -35 12 41
161 54 55 -85 34 58 16 6 49 25 345 -20 169 13 2 -87 18 24 158 57 7 -83 56 15 ... .. .. .. .. .. 155 38 37 -35 8 29
152 44 37 -85 26 15 16 6 53 25 354 -21 153 57 3 -87 11 55 152 17 57 -83 47 3 ... .. .. .. .. .. 154 46 50 -35 4 3
144 19 18 -85 12 17 16 6 57 25 3 -22 140 37 1 -86 56 8 146 2 24 -83 34 14 ... .. .. .. .. .. 153 55 13 -34 59 25
136 46 49 -84 53 54 16 7 0 25 11 -22 129 45 24 -86 33 23 140 13 30 -83 18 15 ... .. .. .. .. .. 153 3 45 -34 54 32
130 7 45 -84 31 58 16 7 4 26 18 -23 121 8 48 -86 5 55 134 52 12 -82 59 32 ... .. .. .. .. .. 152 12 28 -34 49 27
124 18 7 -84 7 14 16 7 8 26 24 -23 114 18 45 -85 35 20 129 57 55 -82 38 28 ... .. .. .. .. .. 151 21 20 -34 44 8
119 11 58 -83 40 19 16 7 11 26 29 -24 108 48 18 -85 2 42 125 29 5 -82 15 27 ... .. .. .. .. .. 150 30 21 -34 38 37
114 42 55 -83 11 42 16 7 15 26 34 -24 104 16 32 -84 28 42 121 23 33 -81 50 47 ... .. .. .. .. .. 149 39 31 -34 32 52
110 45 1 -82 41 46 16 7 19 26 38 -25 100 28 16 -83 53 49 117 39 2 -81 24 43 ... .. .. .. .. .. 148 48 50 -34 26 55
107 13 6 -82 10 49 16 7 22 26 42 -25 97 12 39 -83 18 17 114 13 10 -80 57 31 ... .. .. .. .. .. 147 58 17 -34 20 45
104 2 49 -81 39 2 16 7 26 26 46 -25 94 21 58 -82 42 19 111 3 46 -80 29 20 ... .. .. .. .. .. 147 7 51 -34 14 23
101 10 35 -81 6 36 16 7 30 26 49 -26 91 50 36 -82 6 2 108 8 51 -80 0 19 ... .. .. .. .. .. 146 17 34 -34 7 47
98 33 25 -80 33 37 16 7 33 27 52 -26 89 34 25 -81 29 30 105 26 36 -79 30 36 ... .. .. .. .. .. 145 27 23 -34 0 59
96 8 56 -80 0 13 16 7 37 27 54 -27 87 30 21 -80 52 48 102 55 28 -79 0 16 ... .. .. .. .. .. 144 37 20 -33 53 59
93 55 9 -79 26 26 16 7 41 27 57 -27 85 36 3 -80 15 57 100 34 3 -78 29 25 ... .. .. .. .. .. 143 47 23 -33 46 46
91 50 25 -78 52 20 16 7 44 27 59 -27 83 49 44 -79 38 57 98 21 10 -77 58 6 ... .. .. .. .. .. 142 57 33 -33 39 21
89 53 26 -78 17 57 16 7 48 26 62 -28 82 9 59 -79 1 51 96 15 46 -77 26 23 ... .. .. .. .. .. 142 7 49 -33 31 44
88 3 2 -77 43 18 16 7 51 26 64 -28 80 35 39 -78 24 38 94 16 57 -76 54 16 ... .. .. .. .. .. 141 18 11 -33 23 54
86 18 18 -77 8 25 16 7 55 26 66 -28 79 5 51 -77 47 17 92 23 54 -76 21 49 ... .. .. .. .. .. 140 28 38 -33 15 52
84 38 27 -76 33 18 16 7 59 26 68 -28 77 39 49 -77 9 49 90 35 57 -75 49 3 ... .. .. .. .. .. 139 39 10 -33 7 37
83 2 48 -75 57 57 16 8 2 26 70 -29 76 16 57 -76 32 13 88 52 29 -75 15 58 ... .. .. .. .. .. 138 49 47 -32 59 11
81 30 46 -75 22 24 16 8 6 26 71 -29 74 56 45 -75 54 27 87 12 59 -74 42 35 ... .. .. .. .. .. 138 0 28 -32 50 32
80 1 52 -74 46 36 16 8 10 26 73 -29 73 38 44 -75 16 31 85 36 57 -74 8 55 ... .. .. .. .. .. 137 11 14 -32 41 41
78 35 39 -74 10 34 16 8 13 26 75 -29 72 22 33 -74 38 23 84 4 0 -73 34 58 ... .. .. .. .. .. 136 22 3 -32 32 38
77 11 44 -73 34 17 16 8 17 25 76 -29 71 7 52 -74 0 2 82 33 44 -73 0 43 ... .. .. .. .. .. 135 32 55 -32 23 22
75 49 46 -72 57 45 16 8 21 25 78 -30 69 54 23 -73 21 27 81 5 49 -72 26 11 ... .. .. .. .. .. 134 43 51 -32 13 55
74 29 28 -72 20 56 16 8 24 25 80 -30 68 41 49 -72 42 35 79 39 58 -71 51 21 ... .. .. .. .. .. 133 54 50 -32 4 15
73 10 32 -71 43 48 16 8 28 24 81 -30 67 29 57 -72 3 25 78 15 52 -71 16 11 ... .. .. .. .. .. 133 5 50 -31 54 23
71 52 43 -71 6 21 16 8 32 24 83 -30 66 18 32 -71 23 54 76 53 18 -70 40 42 ... .. .. .. .. .. 132 16 53 -31 44 18
70 35 46 -70 28 32 16 8 35 24 84 -30 65 7 22 -70 44 1 75 32 0 -70 4 51 ... .. .. .. .. .. 131 27 58 -31 34 2
69 19 28 -69 50 21 16 8 39 23 86 -30 63 56 12 -70 3 42 74 11 44 -69 28 38 ... .. .. .. .. .. 130 39 3 -31 23 33
68 3 36 -69 11 44 16 8 43 23 87 -30 62 44 52 -69 22 53 72 52 18 -68 52 2 ... .. .. .. .. .. 129 50 9 -31 12 51
66 47 56 -68 32 38 16 8 46 23 89 -30 61 33 6 -68 41 33 71 33 30 -68 14 59 ... .. .. .. .. .. 129 1 16 -31 1 58
65 32 16 -67 53 2 16 8 50 22 90 -30 60 20 43 -67 59 35 70 15 6 -67 37 29 ... .. .. .. .. .. 128 12 22 -30 50 51
64 16 21 -67 12 52 16 8 54 22 91 -30 59 7 26 -67 16 57 68 56 56 -66 59 29 ... .. .. .. .. .. 127 23 28 -30 39 32
63 0 0 -66 32 3 16 8 57 21 93 -30 57 53 1 -66 33 31 67 38 45 -66 20 55 ... .. .. .. .. .. 126 34 33 -30 28 1
61 42 55 -65 50 32 16 9 1 21 94 -30 56 37 9 -65 49 13 66 20 22 -65 41 46 ... .. .. .. .. .. 125 45 37 -30 16 17
60 24 52 -65 8 13 16 9 5 20 96 -29 55 19 29 -65 3 52 65 1 32 -65 1 57 ... .. .. .. .. .. 124 56 39 -30 4 20
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