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Updated: 2008 JAN 21, 16:20 UT
Event Rank : 25
(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 Feb 26 UT, the 18 km diameter asteroid (1342) Brabantia will occult a 10.5 mag star in the constellation Lupus for observers along narrow north-to-south path through Western Australia passing near Port Headland, Leonora, Kalgoorlie and Esperance.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.1 mag to 14.6 mag (the magnitude of the asteroid) for at most 1.1 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
118 29 6 -13 2 43 16 33 3 31 134 -68 118 36 27 -13 5 3 118 21 43 -13 0 21 119 16 31 -13 17 27 117 40 55 -12 47 1
118 56 24 -14 39 14 16 33 11 33 134 -66 119 3 41 -14 41 25 118 49 7 -14 37 2 119 43 17 -14 53 2 118 8 51 -14 24 34
119 20 50 -16 12 39 16 33 18 34 133 -65 119 28 2 -16 14 42 119 13 36 -16 10 34 120 7 18 -16 25 38 118 33 45 -15 58 50
119 42 42 -17 43 21 16 33 26 35 132 -63 119 49 52 -17 45 18 119 35 31 -17 41 23 120 28 53 -17 55 39 118 55 56 -17 30 17
120 2 15 -19 11 40 16 33 33 37 131 -62 120 9 23 -19 13 31 119 55 6 -19 9 48 120 48 15 -19 23 22 119 15 43 -18 59 14
120 19 42 -20 37 52 16 33 41 38 131 -60 120 26 49 -20 39 38 120 12 34 -20 36 5 121 5 37 -20 49 2 119 33 18 -20 26 0
120 35 12 -22 2 10 16 33 49 39 130 -59 120 42 19 -22 3 52 120 28 5 -22 0 27 121 21 6 -22 12 53 119 48 51 -21 50 47
120 48 54 -23 24 46 16 33 56 40 129 -57 120 56 1 -23 26 24 120 41 46 -23 23 7 121 34 50 -23 35 4 120 2 31 -23 13 49
121 0 53 -24 45 49 16 34 4 41 128 -56 121 8 1 -24 47 24 120 53 44 -24 44 14 121 46 56 -24 55 46 120 14 24 -24 35 15
121 11 14 -26 5 29 16 34 12 42 127 -55 121 18 24 -26 7 1 121 4 4 -26 3 57 121 57 28 -26 15 7 120 24 37 -25 55 14
121 20 3 -27 23 53 16 34 19 43 126 -53 121 27 14 -27 25 22 121 12 51 -27 22 23 122 6 30 -27 33 14 120 33 13 -27 13 55
121 27 21 -28 41 6 16 34 27 44 125 -52 121 34 35 -28 42 33 121 20 6 -28 39 39 122 14 4 -28 50 14 120 40 16 -28 31 24
121 33 11 -29 57 16 16 34 34 44 124 -51 121 40 28 -29 58 41 121 25 54 -29 55 51 122 20 14 -30 6 11 120 45 47 -29 47 47
121 37 35 -31 12 27 16 34 42 45 123 -50 121 44 55 -31 13 50 121 30 14 -31 11 3 122 25 0 -31 21 11 120 49 49 -31 3 10
121 40 33 -32 26 44 16 34 50 46 122 -48 121 47 57 -32 28 6 121 33 8 -32 25 22 122 28 23 -32 35 18 120 52 23 -32 17 36
121 42 6 -33 40 11 16 34 57 47 121 -47 121 49 35 -33 41 31 121 34 37 -33 38 50 122 30 24 -33 48 37 120 53 29 -33 31 12
121 42 14 -34 52 52 16 35 5 47 120 -46 121 49 47 -34 54 11 121 34 40 -34 51 32 122 31 3 -35 1 11 120 53 7 -34 43 59
121 40 56 -36 4 50 16 35 13 48 119 -45 121 48 34 -36 6 8 121 33 17 -36 3 31 122 30 18 -36 13 4 120 51 16 -35 56 2
121 38 10 -37 16 8 16 35 20 48 118 -44 121 45 54 -37 17 26 121 30 26 -37 14 50 122 28 8 -37 24 19 120 47 54 -37 7 25
121 33 55 -38 26 50 16 35 28 49 117 -42 121 41 45 -38 28 7 121 26 5 -38 25 31 122 24 33 -38 34 57 120 43 0 -38 18 9
121 28 8 -39 36 57 16 35 36 49 115 -41 121 36 4 -39 38 14 121 20 11 -39 35 39 122 19 28 -39 45 3 120 36 32 -39 28 17
121 20 47 -40 46 31 16 35 43 50 114 -40 121 28 50 -40 47 49 121 12 43 -40 45 14 122 12 52 -40 54 37 120 28 26 -40 37 52
121 11 47 -41 55 36 16 35 51 50 113 -39 121 19 57 -41 56 54 121 3 35 -41 54 18 122 4 40 -42 3 43 120 18 38 -41 46 56
121 1 4 -43 4 13 16 35 58 50 112 -38 121 9 23 -43 5 31 120 52 45 -43 2 55 121 54 49 -43 12 22 120 7 4 -42 55 30
120 48 34 -44 12 23 16 36 6 51 110 -37 120 57 1 -44 13 42 120 40 7 -44 11 4 121 43 15 -44 20 36 119 53 39 -44 3 37
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