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Updated: 2008 FEB 14, 19:38 UT
Event Rank : 18
(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 2008 Mar 25 UT, the 18 km diameter asteroid (1342) Brabantia will occult a 11.5 mag star in the constellation Lupus for observers along a narrow path across eastern Australia from Mackay in Queensland to Hobart in Tasmania, passing close to Dubbo, Canberra, Bairnsdale and Launceston.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 14.3 mag (the magnitude of the asteroid) for at most 1.9 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
149 34 15 -19 43 16 16 33 13 56 175 -50 149 39 24 -19 43 35 149 29 5 -19 42 57 150 18 55 -19 45 47 148 49 34 -19 40 14
149 27 45 -21 25 32 16 33 30 58 175 -50 149 32 58 -21 25 50 149 22 32 -21 25 12 150 12 55 -21 28 0 148 42 35 -21 22 31
149 21 1 -23 5 55 16 33 47 60 174 -49 149 26 17 -23 6 13 149 15 44 -23 5 36 150 6 43 -23 8 22 148 35 19 -23 2 56
149 14 2 -24 44 37 16 34 4 61 174 -48 149 19 23 -24 44 55 149 8 42 -24 44 18 150 0 19 -24 47 4 148 27 46 -24 41 39
149 6 49 -26 21 47 16 34 21 63 174 -48 149 12 14 -26 22 5 149 1 24 -26 21 28 149 53 43 -26 24 13 148 19 55 -26 18 49
148 59 21 -27 57 33 16 34 38 64 173 -47 149 4 50 -27 57 52 148 53 51 -27 57 15 149 46 55 -28 0 0 148 11 47 -27 54 36
148 51 37 -29 32 4 16 34 55 66 173 -46 148 57 11 -29 32 23 148 46 2 -29 31 46 149 39 54 -29 34 31 148 3 20 -29 29 7
148 43 36 -31 5 27 16 35 12 67 172 -45 148 49 16 -31 5 45 148 37 56 -31 5 8 149 32 40 -31 7 54 147 54 34 -31 2 28
148 35 18 -32 37 46 16 35 29 69 172 -45 148 41 4 -32 38 5 148 29 33 -32 37 27 149 25 11 -32 40 14 147 45 27 -32 34 47
148 26 42 -34 9 9 16 35 46 70 171 -44 148 32 34 -34 9 28 148 20 51 -34 8 50 149 17 27 -34 11 38 147 35 58 -34 6 9
148 17 47 -35 39 41 16 36 3 72 170 -43 148 23 45 -35 40 0 148 11 49 -35 39 22 149 9 28 -35 42 11 147 26 7 -35 36 39
148 8 30 -37 9 27 16 36 20 73 169 -42 148 14 35 -37 9 46 148 2 26 -37 9 7 149 1 11 -37 11 58 147 15 51 -37 6 23
147 58 52 -38 38 31 16 36 37 75 168 -41 148 5 4 -38 38 50 147 52 40 -38 38 11 148 52 37 -38 41 4 147 5 9 -38 35 24
147 48 49 -40 6 57 16 36 54 76 166 -40 147 55 10 -40 7 17 147 42 29 -40 6 37 148 43 43 -40 9 33 146 53 58 -40 3 48
147 38 21 -41 34 51 16 37 11 77 164 -39 147 44 50 -41 35 11 147 31 53 -41 34 30 148 34 28 -41 37 29 146 42 17 -41 31 39
147 27 25 -43 2 15 16 37 28 79 162 -38 147 34 3 -43 2 35 147 20 47 -43 1 54 148 24 50 -43 4 56 146 30 3 -42 58 59
147 15 58 -44 29 13 16 37 45 80 159 -38 147 22 46 -44 29 34 147 9 11 -44 28 52 148 14 47 -44 31 57 146 17 13 -44 25 54
147 3 58 -45 55 50 16 38 2 81 155 -37 147 10 56 -45 56 11 146 57 0 -45 55 28 148 4 17 -45 58 38 146 3 43 -45 52 26
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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