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Updated: 2006 SEP 26, 22:20 UT
Event Rank : 83
(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 Oct 23 UT, the 97 km diameter asteroid (393) Lampetia will occult a 10.3 mag star in the constellation Canis Minor for observers along a wide path running down the eastern Australian coast, beginning at Cape York and running past Cairns, Townsville, Rockhampton and Brisbane before receding to the east between Newcastle and Sydney.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.6 mag (the magnitude of the asteroid) for at most 8.5 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
155 35 18 -37 0 0 17 27 41 41 32 -15 154 49 31 156 20 45 153 51 19 157 17 32
155 11 44 -36 0 0 17 27 31 41 33 -16 154 26 22 155 56 47 153 28 40 156 53 4
154 47 32 -35 0 0 17 27 22 42 34 -16 154 2 32 155 32 12 153 5 17 156 28 1
154 22 42 -34 0 0 17 27 13 43 35 -17 153 38 1 155 7 1 152 41 12 156 2 25
153 57 11 -33 0 0 17 27 3 43 36 -18 153 12 49 154 41 13 152 16 23 155 36 13
153 31 1 -32 0 0 17 26 54 44 37 -19 152 46 55 154 14 46 151 50 50 155 9 25
153 4 11 -31 0 0 17 26 44 44 38 -20 152 20 19 153 47 41 151 24 32 154 42 1
152 36 39 -30 0 0 17 26 34 45 40 -20 151 53 0 153 19 56 150 57 29 154 14 0
152 8 25 -29 0 0 17 26 24 45 41 -21 151 24 57 152 51 31 150 29 39 153 45 20
151 39 28 -28 0 0 17 26 14 46 42 -22 150 56 9 152 22 24 150 1 2 153 16 1
151 9 46 -27 0 0 17 26 3 46 43 -23 150 26 34 151 52 35 149 31 36 152 46 1
150 39 18 -26 0 0 17 25 53 47 45 -24 149 56 12 151 22 1 149 1 20 152 15 19
150 8 3 -25 0 0 17 25 42 47 46 -25 149 25 1 150 50 42 148 30 13 151 43 54
149 35 59 -24 0 0 17 25 31 47 48 -26 148 52 59 150 18 35 147 58 13 151 11 45
149 3 5 -23 0 0 17 25 20 47 49 -27 148 20 5 149 45 40 147 25 18 150 38 48
148 29 18 -22 0 0 17 25 9 48 50 -28 147 46 16 149 11 55 146 51 26 150 5 3
147 54 36 -21 0 0 17 24 58 48 52 -29 147 11 31 148 37 17 146 16 35 149 30 28
147 18 58 -20 0 0 17 24 47 48 53 -30 146 35 46 148 1 43 145 40 42 148 55 0
146 42 20 -19 0 0 17 24 35 48 55 -31 145 59 1 147 25 13 145 3 45 148 18 38
146 4 40 -18 0 0 17 24 24 48 57 -32 145 21 11 146 47 42 144 25 41 147 41 18
145 25 56 -17 0 0 17 24 12 48 58 -33 144 42 14 146 9 9 143 46 27 147 2 58
144 46 2 -16 0 0 17 24 1 48 60 -34 144 2 6 145 29 30 143 5 58 146 23 34
144 4 57 -15 0 0 17 23 49 48 61 -35 143 20 43 144 48 41 142 24 12 145 43 5
143 22 36 -14 0 0 17 23 37 48 63 -36 142 38 2 144 6 39 141 41 3 145 1 25
142 38 55 -13 0 0 17 23 25 47 64 -37 141 53 57 143 23 19 140 56 27 144 18 31
141 53 49 -12 0 0 17 23 13 47 66 -38 141 8 25 142 38 38 140 10 19 143 34 19
141 7 13 -11 0 0 17 23 0 47 67 -39 140 21 18 141 52 30 139 22 32 142 48 43
140 19 0 -10 0 0 17 22 48 46 69 -40 139 32 32 141 4 49 138 33 0 142 1 40
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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