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Updated: 2007 JUN 15, 01:40 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 2007 Jun 24 UT, the 151 km diameter asteroid (145) Adeona will occult a 11.5 mag star in the constellation Aquarius for observers along a wide path covering most of the southern third of the south island of New Zealand, including Invercargill and just grazing Dunedin.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.1 mag to 13.4 mag (the magnitude of the asteroid) for at most 20.5 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, 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
166 53 22 -40 53 37 14 12 9 42 83 -66 168 9 23 -40 38 59 165 35 17 -41 7 32 169 7 20 -40 27 7 164 32 53 -41 17 52
167 18 25 -41 50 59 14 12 24 42 82 -65 168 35 16 -41 36 4 165 59 29 -42 5 12 169 33 50 -41 23 57 164 56 22 -42 15 46
167 42 45 -42 48 25 14 12 39 43 80 -64 169 0 30 -42 33 11 166 22 52 -43 2 56 169 59 44 -42 20 51 165 18 59 -43 13 44
168 6 22 -43 45 55 14 12 54 43 79 -63 169 25 6 -43 30 24 166 45 27 -44 0 44 170 25 4 -43 17 49 165 40 44 -44 11 46
168 29 17 -44 43 32 14 13 10 43 78 -63 169 49 5 -44 27 43 167 7 14 -44 58 39 170 49 51 -44 14 54 166 1 36 -45 9 54
168 51 29 -45 41 17 14 13 25 43 77 -62 170 12 27 -45 25 10 167 28 13 -45 56 41 171 14 5 -45 12 7 166 21 36 -46 8 9
169 13 0 -46 39 12 14 13 40 43 75 -61 170 35 13 -46 22 46 167 48 24 -46 54 53 171 37 47 -46 9 29 166 40 42 -47 6 35
169 33 48 -47 37 18 14 13 55 43 74 -60 170 57 22 -47 20 34 168 7 46 -47 53 17 172 0 57 -47 7 3 166 58 53 -48 5 12
169 53 53 -48 35 37 14 14 10 43 73 -59 171 18 55 -48 18 36 168 26 18 -48 51 54 172 23 34 -48 4 50 167 16 9 -49 4 2
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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