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Updated: 2008 OCT 01, 04:11 UT
Event Rank : 41
(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 Oct 07 UT, the 36 km diameter asteroid (597) Bandusia will occult a 6.6 mag star in the constellation Taurus for observers along a path across eastern South Australia and western Victoria, New South Wales and Queensland.
In the case of an occultation, the combined light of the asteroid and the star will drop by 7.1 mag to 13.7 mag (the magnitude of the asteroid) for at most 6.4 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: .
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
142 34 49 -45 0 0 18 12 39 18 357 -17 142 48 35 142 21 3 143 32 40 141 36 58
142 28 54 -44 0 0 18 12 45 19 357 -18 142 42 27 142 15 22 143 25 46 141 32 2
142 23 1 -43 0 0 18 12 52 20 358 -18 142 36 20 142 9 42 143 18 58 141 27 4
142 17 10 -42 0 0 18 12 59 21 358 -19 142 30 16 142 4 3 143 12 14 141 22 5
142 11 19 -41 0 0 18 13 6 22 358 -19 142 24 14 141 58 24 143 5 33 141 17 5
142 5 29 -40 0 0 18 13 13 23 358 -19 142 18 13 141 52 46 142 58 55 141 12 3
141 59 40 -39 0 0 18 13 21 24 358 -20 142 12 12 141 47 7 142 52 20 141 6 58
141 53 50 -38 0 0 18 13 29 25 358 -20 142 6 12 141 41 28 142 45 48 141 1 52
141 48 0 -37 0 0 18 13 38 26 358 -21 142 0 13 141 35 47 142 39 17 140 56 43
141 42 10 -36 0 0 18 13 47 27 358 -21 141 54 13 141 30 6 142 32 47 140 51 31
141 36 18 -35 0 0 18 13 56 28 358 -22 141 48 13 141 24 24 142 26 19 140 46 17
141 30 26 -34 0 0 18 14 5 29 358 -22 141 42 12 141 18 40 142 19 51 140 41 0
141 24 32 -33 0 0 18 14 15 30 358 -23 141 36 10 141 12 54 142 13 24 140 35 39
141 18 37 -32 0 0 18 14 25 31 358 -23 141 30 7 141 7 6 142 6 57 140 30 16
141 12 40 -31 0 0 18 14 35 32 358 -24 141 24 3 141 1 17 142 0 29 140 24 50
141 6 42 -30 0 0 18 14 46 33 358 -24 141 17 58 140 55 25 141 54 2 140 19 20
141 0 41 -29 0 0 18 14 57 34 358 -24 141 11 51 140 49 31 141 47 34 140 13 47
140 54 39 -28 0 0 18 15 8 35 358 -25 141 5 42 140 43 35 141 41 5 140 8 11
140 48 34 -27 0 0 18 15 19 36 358 -25 140 59 32 140 37 36 141 34 36 140 2 31
140 42 27 -26 0 0 18 15 31 37 358 -26 140 53 19 140 31 35 141 28 5 139 56 47
140 36 17 -25 0 0 18 15 43 38 358 -26 140 47 4 140 25 30 141 21 33 139 51 0
140 30 5 -24 0 0 18 15 55 39 358 -27 140 40 47 140 19 23 141 15 0 139 45 9
140 23 50 -23 0 0 18 16 8 40 358 -27 140 34 27 140 13 13 141 8 26 139 39 14
140 17 33 -22 0 0 18 16 20 41 358 -27 140 28 6 140 7 1 141 1 49 139 33 16
140 11 13 -21 0 0 18 16 33 42 358 -28 140 21 41 140 0 45 140 55 11 139 27 13
140 4 50 -20 0 0 18 16 47 43 358 -28 140 15 14 139 54 25 140 48 31 139 21 7
139 58 24 -19 0 0 18 17 0 44 358 -28 140 8 44 139 48 3 140 41 49 139 14 57
139 51 55 -18 0 0 18 17 14 45 359 -29 140 2 12 139 41 38 140 35 6 139 8 43
139 45 23 -17 0 0 18 17 28 46 359 -29 139 55 36 139 35 9 140 28 20 139 2 25
139 38 48 -16 0 0 18 17 42 47 359 -29 139 48 58 139 28 37 140 21 31 138 56 2
139 32 9 -15 0 0 18 17 57 48 359 -30 139 42 17 139 22 1 140 14 41 138 49 36
139 25 28 -14 0 0 18 18 12 49 359 -30 139 35 33 139 15 22 140 7 48 138 43 6
139 18 43 -13 0 0 18 18 27 50 359 -30 139 28 45 139 8 40 140 0 53 138 36 31
139 11 55 -12 0 0 18 18 42 51 359 -31 139 21 55 139 1 54 139 53 55 138 29 52
139 5 3 -11 0 0 18 18 57 52 359 -31 139 15 1 138 55 5 139 46 55 138 23 9
138 58 8 -10 0 0 18 19 13 53 359 -31 139 8 4 138 48 12 139 39 52 138 16 22
Uncertainty in time = +/- 10 secs
[Prediction of 2008 Oct 1.0]
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