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Updated: 2004 NOV 28, 20:47 UT
Event Rank : 32
(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 2004 Dec 28 UT, the 28 km diameter asteroid (1670) Minnaert will occult a 10.9 mag star in the constellation Auriga for observers along a path across Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.0 mag to 14.9 mag (the magnitude of the asteroid) for at most 2.4 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 :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
168 54 18 -54 0 0 14 14 37 0 341 -11 169 22 31 168 25 53 ... .. .. 166 26 43
168 16 50 -53 0 0 14 14 37 2 341 -12 168 44 39 167 48 49 170 37 25 165 51 16
167 37 22 -52 0 0 14 14 38 3 342 -13 168 4 51 167 9 42 169 56 12 165 13 34
166 55 56 -51 0 0 14 14 39 4 342 -14 167 23 7 166 28 34 169 13 14 164 33 40
166 12 32 -50 0 0 14 14 40 5 343 -15 166 39 27 165 45 24 168 28 31 163 51 32
165 27 8 -49 0 0 14 14 42 6 344 -16 165 53 51 165 0 14 167 42 2 163 7 12
164 39 45 -48 0 0 14 14 45 7 344 -17 165 6 18 164 13 0 166 53 44 162 20 38
163 50 19 -47 0 0 14 14 48 8 345 -18 164 16 44 163 23 41 166 3 38 161 31 47
162 58 47 -46 0 0 14 14 51 9 345 -19 163 25 7 162 32 15 165 11 38 160 40 37
162 5 6 -45 0 0 14 14 55 10 346 -20 162 31 24 161 38 36 164 17 42 159 47 2
161 9 11 -44 0 0 14 14 59 11 347 -22 161 35 30 160 42 40 163 21 45 158 50 59
160 10 56 -43 0 0 14 15 4 13 348 -23 160 37 18 159 44 21 162 23 42 157 52 19
159 10 14 -42 0 0 14 15 10 14 348 -24 159 36 42 158 43 32 161 23 27 156 50 54
Latitude Latitude Latitude Latitude
158 0 0 -40 53 34 14 15 16 15 349 -25 -40 29 5 -41 18 34 -38 52 57 -43 7 42
157 0 0 -39 59 13 14 15 22 16 350 -26 -39 35 28 -40 23 25 -38 1 59 -42 8 43
156 0 0 -39 6 56 14 15 29 17 351 -27 -38 43 52 -39 30 25 -37 12 48 -41 12 17
155 0 0 -38 16 37 14 15 35 18 352 -28 -37 54 10 -38 39 28 -36 25 20 -40 18 14
154 0 0 -37 28 13 14 15 42 19 352 -29 -37 6 19 -37 50 28 -35 39 32 -39 26 26
153 0 0 -36 41 36 14 15 49 20 353 -30 -36 20 13 -37 3 19 -34 55 20 -38 36 44
152 0 0 -35 56 45 14 15 56 20 354 -31 -35 35 50 -36 17 58 -34 12 42 -37 49 4
151 0 0 -35 13 35 14 16 4 21 355 -32 -34 53 6 -35 34 21 -33 31 36 -37 3 19
150 0 0 -34 32 2 14 16 11 22 356 -32 -34 11 58 -34 52 23 -32 51 58 -36 19 24
149 0 0 -33 52 5 14 16 19 23 357 -33 -33 32 23 -34 12 2 -32 13 47 -35 37 15
148 0 0 -33 13 40 14 16 27 23 358 -34 -32 54 19 -33 33 15 -31 37 2 -34 56 49
147 0 0 -32 36 45 14 16 35 24 358 -34 -32 17 44 -32 56 0 -31 1 39 -34 18 2
146 0 0 -32 1 17 14 16 43 25 359 -35 -31 42 34 -32 20 14 -30 27 38 -33 40 50
145 0 0 -31 27 16 14 16 51 25 0 -35 -31 8 49 -31 45 55 -29 54 57 -33 5 12
144 0 0 -30 54 38 14 17 0 26 1 -36 -30 36 27 -31 13 1 -29 23 34 -32 31 4
143 0 0 -30 23 22 14 17 8 26 2 -36 -30 5 26 -30 41 30 -28 53 29 -31 58 25
142 0 0 -29 53 27 14 17 17 27 3 -37 -29 35 45 -30 11 21 -28 24 40 -31 27 12
141 0 0 -29 24 52 14 17 25 27 4 -37 -29 7 22 -29 42 32 -27 57 6 -30 57 24
140 0 0 -28 57 34 14 17 34 28 5 -38 -28 40 16 -29 15 2 -27 30 45 -30 28 59
139 0 0 -28 31 32 14 17 42 28 6 -38 -28 14 26 -28 48 49 -27 5 38 -30 1 54
138 0 0 -28 6 46 14 17 51 28 7 -38 -27 49 50 -28 23 52 -26 41 42 -29 36 10
137 0 0 -27 43 15 14 18 0 29 7 -38 -27 26 28 -28 0 10 -26 18 57 -29 11 44
136 0 0 -27 20 56 14 18 9 29 8 -39 -27 4 19 -27 37 43 -25 57 23 -28 48 35
135 0 0 -26 59 51 14 18 17 29 9 -39 -26 43 22 -27 16 29 -25 36 58 -28 26 43
134 0 0 -26 39 57 14 18 26 29 10 -39 -26 23 35 -26 56 27 -25 17 41 -28 6 5
133 0 0 -26 21 13 14 18 35 29 11 -39 -26 5 0 -26 37 36 -24 59 33 -27 46 42
132 0 0 -26 3 40 14 18 44 29 12 -39 -25 47 33 -26 19 56 -24 42 33 -27 28 31
131 0 0 -25 47 17 14 18 52 29 13 -39 -25 31 16 -26 3 26 -24 26 39 -27 11 34
130 0 0 -25 32 2 14 19 1 30 14 -39 -25 16 7 -25 48 6 -24 11 52 -26 55 48
129 0 0 -25 17 56 14 19 10 30 15 -39 -25 2 6 -25 33 55 -23 58 11 -26 41 13
128 0 0 -25 4 58 14 19 18 30 16 -39 -24 49 12 -25 20 52 -23 45 35 -26 27 49
127 0 0 -24 53 7 14 19 27 29 17 -39 -24 37 26 -25 8 56 -23 34 5 -26 15 35
126 0 0 -24 42 23 14 19 36 29 18 -39 -24 26 46 -24 58 9 -23 23 39 -26 4 30
125 0 0 -24 32 46 14 19 44 29 19 -38 -24 17 12 -24 48 28 -23 14 19 -25 54 35
124 0 0 -24 24 16 14 19 53 29 19 -38 -24 8 44 -24 39 55 -23 6 2 -25 45 48
123 0 0 -24 16 51 14 20 1 29 20 -38 -24 1 22 -24 32 28 -22 58 50 -25 38 10
122 0 0 -24 10 33 14 20 9 29 21 -38 -23 55 6 -24 26 7 -22 52 41 -25 31 40
121 0 0 -24 5 20 14 20 18 28 22 -37 -23 49 55 -24 20 53 -22 47 37 -25 26 18
120 0 0 -24 1 13 14 20 26 28 23 -37 -23 45 49 -24 16 44 -22 43 36 -25 22 4
119 0 0 -23 58 11 14 20 34 28 24 -36 -23 42 48 -24 13 42 -22 40 39 -25 18 58
118 0 0 -23 56 16 14 20 42 28 25 -36 -23 40 53 -24 11 46 -22 38 45 -25 16 59
117 0 0 -23 55 25 14 20 50 27 25 -36 -23 40 3 -24 10 55 -22 37 55 -25 16 8
116 0 0 -23 55 41 14 20 58 27 26 -35 -23 40 18 -24 11 11 -22 38 9 -25 16 25
115 0 0 -23 57 2 14 21 6 26 27 -35 -23 41 38 -24 12 33 -22 39 26 -25 17 50
114 0 0 -23 59 29 14 21 13 26 28 -34 -23 44 4 -24 15 1 -22 41 48 -25 20 23
113 0 0 -24 3 1 14 21 21 25 28 -33 -23 47 35 -24 18 35 -22 45 14 -25 24 5
112 0 0 -24 7 41 14 21 28 25 29 -33 -23 52 13 -24 23 16 -22 49 43 -25 28 55
111 0 0 -24 13 26 14 21 35 24 30 -32 -23 57 56 -24 29 4 -22 55 18 -25 34 53
110 0 0 -24 20 19 14 21 42 24 31 -32 -24 4 46 -24 36 0 -23 1 57 -25 42 1
Use these links for further information:
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[Observing Details]
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