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Updated: 2006 OCT 14, 17:34 UT
Event Rank : 75
(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 2006 Nov 11 UT, the 75 km diameter asteroid (795) Fini will occult a 11.8 mag star in the constellation Perseus for observers along a path across Australia, starting near Byron Bay, and moving across Queensland into Northern Territory passing south of Darwin.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 14.1 mag (the magnitude of the asteroid) for at most 5.1 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
160 35 16 -35 0 0 16 27 30 6 326 -18 161 22 19 159 47 48 ... .. .. 158 35 48
159 32 48 -34 0 0 16 27 32 8 327 -20 160 19 51 158 45 19 161 29 40 157 33 15
158 29 15 -33 0 0 16 27 34 9 328 -21 159 16 21 157 41 42 160 26 13 156 29 30
157 24 32 -32 0 0 16 27 36 10 328 -22 158 11 44 156 36 52 159 21 43 155 24 26
156 18 32 -31 0 0 16 27 39 12 329 -24 157 5 54 155 30 41 158 16 5 154 17 56
155 11 10 -30 0 0 16 27 42 13 329 -25 155 58 46 154 23 5 157 9 14 153 9 55
154 2 19 -29 0 0 16 27 46 14 330 -26 154 50 11 153 13 54 156 1 2 152 0 13
152 51 50 -28 0 0 16 27 50 16 331 -28 153 40 4 152 3 3 154 51 23 150 48 44
151 39 36 -27 0 0 16 27 54 17 331 -29 152 28 15 150 50 21 153 40 9 149 35 16
150 25 27 -26 0 0 16 27 59 19 332 -31 151 14 36 149 35 39 152 27 12 148 19 40
149 9 12 -25 0 0 16 28 4 20 333 -32 149 58 57 148 18 45 151 12 22 147 1 43
147 50 39 -24 0 0 16 28 10 21 334 -34 148 41 6 146 59 28 149 55 29 145 41 12
146 29 36 -23 0 0 16 28 17 23 334 -35 147 20 51 145 37 32 148 36 21 144 17 51
145 5 46 -22 0 0 16 28 24 24 335 -37 145 57 58 144 12 41 147 14 45 142 51 20
143 38 50 -21 0 0 16 28 31 26 336 -39 144 32 8 142 44 36 145 50 25 141 21 18
142 8 29 -20 0 0 16 28 40 27 337 -40 143 3 3 141 12 52 144 23 4 139 47 20
140 34 16 -19 0 0 16 28 49 29 338 -42 141 30 18 139 37 3 142 52 20 138 8 51
138 55 40 -18 0 0 16 28 58 30 339 -44 139 53 26 137 56 35 141 17 50 136 25 15
137 12 4 -17 0 0 16 29 9 32 340 -46 138 11 52 136 10 45 139 39 2 134 35 40
135 22 39 -16 0 0 16 29 20 33 342 -47 136 24 54 134 18 40 137 55 20 132 39 2
133 26 26 -15 0 0 16 29 33 35 343 -49 134 31 38 132 19 11 136 5 59 130 33 55
131 22 3 -14 0 0 16 29 47 36 345 -51 132 30 52 130 10 43 134 10 0 128 18 20
Latitude Latitude Latitude Latitude
130 0 0 -13 22 47 16 29 56 37 346 -53 -12 50 43 -13 55 12 -12 3 14 -14 44 30
129 0 0 -12 56 45 16 30 3 38 347 -53 -12 24 54 -13 28 56 -11 37 43 -14 17 53
128 0 0 -12 31 41 16 30 10 38 348 -54 -12 0 3 -13 3 40 -11 13 10 -13 52 17
127 0 0 -12 7 37 16 30 17 39 348 -55 -11 36 10 -12 39 23 -10 49 35 -13 27 41
126 0 0 -11 44 31 16 30 24 39 349 -56 -11 13 15 -12 16 5 -10 26 56 -13 4 5
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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