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Updated: 2014 JUL 08, 18:24 UT
Event Rank : 98
(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 2014 Aug 07 UT, the 207 km diameter asteroid (29) Amphitrite will occult a 11.4 mag star in the constellation Scorpius for observers along a path over New Zealand near Wellington, Blenheim and New Plymouth.
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.3 mag to 10.2 mag (the magnitude of the asteroid) for at most 55.3 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 :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 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
128 33 14 11 0 0 10 41 24 43 156 -13 129 42 15 127 24 18 130 29 15 126 37 29
129 13 2 10 0 0 10 41 1 44 156 -14 130 21 54 128 4 17 131 8 49 127 17 34
129 52 53 9 0 0 10 40 37 46 157 -15 131 1 38 128 44 16 131 48 28 127 57 39
130 32 48 8 0 0 10 40 12 47 157 -16 131 41 27 129 24 17 132 28 14 128 37 45
131 12 48 7 0 0 10 39 47 48 157 -17 132 21 23 130 4 22 133 8 7 129 17 54
131 52 55 6 0 0 10 39 21 49 157 -18 133 1 27 130 44 31 133 48 10 129 58 6
132 33 9 5 0 0 10 38 56 50 157 -18 133 41 41 131 24 47 134 28 23 130 38 23
133 13 33 4 0 0 10 38 29 51 158 -19 134 22 5 132 5 11 135 8 49 131 18 47
133 54 7 3 0 0 10 38 2 52 158 -20 135 2 41 132 45 44 135 49 27 131 59 19
134 34 53 2 0 0 10 37 35 53 158 -21 135 43 31 133 26 26 136 30 19 132 40 1
135 15 52 1 0 0 10 37 7 55 158 -22 136 24 36 134 7 21 137 11 28 133 20 52
135 57 5 0 0 0 10 36 39 56 159 -23 137 5 56 134 48 28 137 52 54 134 1 56
136 38 35 - 1 0 0 10 36 11 57 159 -24 137 47 34 135 29 50 138 34 38 134 43 13
Latitude Latitude Latitude Latitude
137 0 0 - 1 30 49 10 35 56 57 159 -24 0 8 35 - 3 9 28 1 16 41 - 4 16 10
138 0 0 - 2 56 31 10 35 14 59 159 -25 - 1 17 50 - 4 34 29 - 0 10 15 - 5 40 46
139 0 0 - 4 21 15 10 34 32 61 160 -26 - 2 43 17 - 5 58 33 - 1 36 14 - 7 4 23
140 0 0 - 5 44 58 10 33 50 62 160 -27 - 4 7 44 - 7 21 34 - 3 1 12 - 8 26 57
141 0 0 - 7 7 36 10 33 7 64 161 -29 - 5 31 7 - 8 43 30 - 4 25 6 - 9 48 25
142 0 0 - 8 29 5 10 32 24 65 161 -30 - 6 53 21 -10 4 16 - 5 47 53 -11 8 44
143 0 0 - 9 49 23 10 31 42 67 162 -31 - 8 14 24 -11 23 51 - 7 9 28 -12 27 51
144 0 0 -11 8 27 10 30 59 68 163 -32 - 9 34 14 -12 42 12 - 8 29 50 -13 45 43
145 0 0 -12 26 15 10 30 17 70 164 -33 -10 52 47 -13 59 16 - 9 48 55 -15 2 19
146 0 0 -13 42 44 10 29 34 71 165 -34 -12 10 2 -15 15 2 -11 6 43 -16 17 36
147 0 0 -14 57 54 10 28 52 73 166 -35 -13 25 57 -16 29 27 -12 23 10 -17 31 32
148 0 0 -16 11 41 10 28 10 74 167 -36 -14 40 30 -17 42 30 -13 38 15 -18 44 7
149 0 0 -17 24 5 10 27 29 75 169 -37 -15 53 40 -18 54 11 -14 51 58 -19 55 18
150 0 0 -18 35 6 10 26 48 77 171 -38 -17 5 26 -20 4 27 -16 4 16 -21 5 4
151 0 0 -19 44 41 10 26 7 78 173 -39 -18 15 47 -21 13 18 -17 15 8 -22 13 26
152 0 0 -20 52 50 10 25 27 79 177 -40 -19 24 42 -22 20 43 -18 24 35 -23 20 22
153 0 0 -21 59 33 10 24 47 80 180 -41 -20 32 11 -23 26 42 -19 32 35 -24 25 52
154 0 0 -23 4 50 10 24 8 81 185 -41 -21 38 13 -24 31 15 -20 39 9 -25 29 55
155 0 0 -24 8 40 10 23 29 82 191 -42 -22 42 48 -25 34 21 -21 44 15 -26 32 32
156 0 0 -25 11 4 10 22 51 83 199 -43 -23 45 56 -26 36 1 -22 47 54 -27 33 43
157 0 0 -26 12 1 10 22 13 83 208 -44 -24 47 38 -27 36 15 -23 50 7 -28 33 27
158 0 0 -27 11 32 10 21 36 84 218 -44 -25 47 53 -28 35 2 -24 50 53 -29 31 46
159 0 0 -28 9 38 10 21 0 84 230 -45 -26 46 43 -29 32 25 -25 50 13 -30 28 39
160 0 0 -29 6 19 10 20 24 84 241 -46 -27 44 7 -30 28 22 -26 48 7 -31 24 7
161 0 0 -30 1 35 10 19 49 83 252 -46 -28 40 7 -31 22 56 -27 44 37 -32 18 12
162 0 0 -30 55 27 10 19 14 83 261 -47 -29 34 42 -32 16 6 -28 39 42 -33 10 54
163 0 0 -31 47 57 10 18 41 82 268 -47 -30 27 55 -33 7 53 -29 33 24 -34 2 13
164 0 0 -32 39 5 10 18 7 82 274 -48 -31 19 45 -33 58 20 -30 25 43 -34 52 11
165 0 0 -33 28 53 10 17 35 81 278 -49 -32 10 14 -34 47 26 -31 16 41 -35 40 49
166 0 0 -34 17 21 10 17 3 80 282 -49 -32 59 23 -35 35 12 -32 6 19 -36 28 8
167 0 0 -35 4 30 10 16 32 79 285 -50 -33 47 14 -36 21 41 -32 54 37 -37 14 9
168 0 0 -35 50 22 10 16 1 78 287 -50 -34 33 46 -37 6 53 -33 41 37 -37 58 54
169 0 0 -36 34 58 10 15 31 77 289 -50 -35 19 2 -37 50 49 -34 27 20 -38 42 23
170 0 0 -37 18 19 10 15 2 76 290 -51 -36 3 3 -38 33 31 -35 11 48 -39 24 38
171 0 0 -38 0 27 10 14 33 76 291 -51 -36 45 49 -39 15 0 -35 55 1 -40 5 41
172 0 0 -38 41 22 10 14 5 75 292 -51 -37 27 23 -39 55 17 -36 37 1 -40 45 32
173 0 0 -39 21 7 10 13 38 74 293 -52 -38 7 46 -40 34 25 -37 17 49 -41 24 14
174 0 0 -39 59 42 10 13 11 73 293 -52 -38 46 58 -41 12 23 -37 57 27 -42 1 47
175 0 0 -40 37 10 10 12 44 72 294 -52 -39 25 2 -41 49 14 -38 35 56 -42 38 13
176 0 0 -41 13 30 10 12 19 71 294 -53 -40 1 59 -42 24 58 -39 13 17 -43 13 33
177 0 0 -41 48 46 10 11 54 70 294 -53 -40 37 49 -42 59 38 -39 49 32 -43 47 49
178 0 0 -42 22 57 10 11 29 69 294 -53 -41 12 35 -43 33 15 -40 24 41 -44 21 2
179 0 0 -42 56 5 10 11 5 69 294 -53 -41 46 18 -44 5 50 -40 58 47 -44 53 14
180 0 0 -43 28 13 10 10 41 68 294 -54 -42 18 59 -44 37 24 -41 31 51 -45 24 25
-179 0 0 -43 59 20 10 10 18 67 294 -54 -42 50 39 -45 7 58 -42 3 53 -45 54 37
-178 0 0 -44 29 29 10 9 56 66 294 -54 -43 21 20 -45 37 35 -42 34 56 -46 23 52
-177 0 0 -44 58 41 10 9 34 65 294 -54 -43 51 3 -46 6 15 -43 5 0 -46 52 11
Uncertainty in time = +/- 23 secs
Prediction of 2014 Jul 9.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
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