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Updated: 2006 MAY 06, 15:22 UT
Event Rank : 34
(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 Jun 09 UT, the 42 km diameter asteroid (1765) Wrubel will occult a 10.8 mag star in the constellation Sagittarius for observers along a somewhat uncertain path across Australia, beginning near Sarina in Queensland, across western New South Wales and north-western Victoria, ending near Mount Gambier in southern South Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 14.2 mag (the magnitude of the asteroid) for at most 3.8 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
150 52 3 -18 0 0 17 23 44 67 212 -41 150 39 8 151 4 58 149 48 12 151 55 51
150 25 51 -19 0 0 17 23 54 68 213 -42 150 12 51 150 38 51 149 21 36 151 30 2
149 59 26 -20 0 0 17 24 4 69 214 -42 149 46 21 150 12 31 148 54 46 151 4 2
149 32 48 -21 0 0 17 24 15 71 215 -43 149 19 37 149 45 58 148 27 40 150 37 50
149 5 54 -22 0 0 17 24 25 72 216 -44 148 52 38 149 19 10 148 0 17 150 11 25
148 38 44 -23 0 0 17 24 35 73 217 -44 148 25 21 148 52 6 147 32 36 149 44 45
148 11 17 -24 0 0 17 24 45 74 218 -45 147 57 47 148 24 45 147 4 36 149 17 49
147 43 30 -25 0 0 17 24 56 75 219 -45 147 29 54 147 57 6 146 36 15 148 50 37
147 15 24 -26 0 0 17 25 6 76 220 -46 147 1 40 147 29 7 146 7 32 148 23 6
146 46 55 -27 0 0 17 25 17 77 222 -46 146 33 4 147 0 46 145 38 25 147 55 16
146 18 3 -28 0 0 17 25 27 78 224 -47 146 4 4 146 32 2 145 8 52 147 27 4
145 48 47 -29 0 0 17 25 38 78 226 -47 145 34 38 146 2 54 144 38 52 146 58 30
145 19 3 -30 0 0 17 25 48 79 229 -48 145 4 46 145 33 20 144 8 23 146 29 31
144 48 51 -31 0 0 17 25 59 80 232 -48 144 34 24 145 3 17 143 37 22 146 0 6
143 0 0 -34 27 54 17 26 36 83 250 -49 -34 0 3 -34 55 49 -32 10 54 -36 46 29
142 0 0 -36 16 48 17 26 56 84 266 -50 -35 49 18 -36 44 22 -34 1 32 -38 33 38
141 0 0 -38 1 34 17 27 15 84 287 -50 -37 34 27 -38 28 46 -35 48 7 -40 16 34
140 0 0 -39 42 13 17 27 34 84 309 -51 -39 15 29 -40 9 1 -37 30 39 -41 55 17
139 0 0 -41 18 45 17 27 51 83 327 -51 -40 52 25 -41 45 9 -39 9 9 -43 29 49
138 0 0 -42 51 13 17 28 8 83 339 -51 -42 25 17 -43 17 13 -40 43 38 -45 0 13
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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