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Updated: 2006 APR 20, 22:11 UT
Event Rank : 97
(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 May 01 UT, the 69 km diameter asteroid (336) Lacadiera will occult a 12.0 mag star in the constellation Virgo for observers along a path across the north island of New Zealand, passing directly over Auckland.
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 12.3 mag (the magnitude of the asteroid) for at most 8.8 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, 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 Limit1 Path Limit2 Error Limit1 Error Limit2
E. Longitude Latitude U.T. Alt Az Alt
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
179 43 54 -41 59 17 7 10 6 37 71 -23 179 5 17 -42 11 10 -179 38 11 -41 47 19 178 34 39 -42 20 22 -179 9 5 -41 37 55
179 4 56 -41 12 30 7 10 18 37 72 -23 178 26 33 -41 24 12 179 42 36 -41 0 41 177 56 7 -41 33 16 -179 48 29 -40 51 25
178 25 22 -40 25 51 7 10 31 36 73 -22 177 47 13 -40 37 23 179 2 50 -40 14 13 177 16 57 -40 46 19 179 31 35 -40 5 4
177 45 12 -39 39 20 7 10 43 36 75 -22 177 7 14 -39 50 43 178 22 29 -39 27 52 176 37 7 -39 59 30 178 51 6 -39 18 51
177 4 23 -38 52 56 7 10 56 36 76 -21 176 26 34 -39 4 9 177 41 31 -38 41 38 175 56 35 -39 12 49 178 10 2 -38 32 45
176 22 54 -38 6 38 7 11 8 36 77 -21 175 45 12 -38 17 40 176 59 55 -37 55 30 175 15 18 -38 26 12 177 28 20 -37 46 44
175 40 41 -37 20 24 7 11 21 35 78 -20 175 3 5 -37 31 16 176 17 37 -37 9 26 174 33 15 -37 39 40 176 45 58 -37 0 48
174 57 43 -36 34 14 7 11 34 35 79 -20 174 20 10 -36 44 56 175 34 35 -36 23 25 173 50 22 -36 53 12 176 2 54 -36 14 55
174 13 56 -35 48 5 7 11 46 35 80 -19 173 36 24 -35 58 37 174 50 48 -35 37 27 173 6 37 -36 6 45 175 19 5 -35 29 5
173 29 18 -35 1 57 7 11 59 34 81 -18 172 51 45 -35 12 19 174 6 10 -34 51 29 172 21 57 -35 20 18 174 34 28 -34 43 15
172 43 45 -34 15 49 7 12 11 34 82 -18 172 6 8 -34 25 59 173 20 40 -34 5 31 171 36 18 -34 33 51 173 49 0 -33 57 24
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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