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Updated: 2005 NOV 14, 23:51 UT
Event Rank : 61
(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 2005 Nov 19 UT, the 36 km diameter asteroid (323) Brucia will occult a 10.4 mag star in the constellation Gemini for observers along a path across central Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.3 mag to 12.6 mag (the magnitude of the asteroid) for at most 4.6 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, 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 Alt
E. Longitude Latitude U.T. Alt Az Alt Crn
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
121 18 9 -36 5 25 16 22 15 22 52 -34 120 57 54 -36 7 47 121 38 11 -36 3 7 120 15 54 -36 12 50 122 18 24 -35 58 37 -0.58
123 17 15 -33 52 56 16 22 33 24 51 -35 122 58 50 -33 54 49 123 35 30 -33 51 6 122 20 47 -33 58 49 124 12 16 -33 47 31 -0.59
124 55 18 -31 48 59 16 22 51 27 51 -37 124 38 12 -31 50 32 125 12 17 -31 47 29 124 2 55 -31 53 48 125 46 34 -31 44 33 -0.60
126 18 6 -29 51 37 16 23 9 29 50 -38 126 1 59 -29 52 54 126 34 8 -29 50 22 125 28 46 -29 55 38 127 6 32 -29 47 54 -0.60
127 29 17 -27 59 32 16 23 27 31 50 -40 127 13 56 -28 0 37 127 44 34 -27 58 28 126 42 20 -28 2 57 128 15 29 -27 56 24 -0.61
128 31 19 -26 11 50 16 23 45 33 50 -41 128 16 34 -26 12 46 128 45 59 -26 10 56 127 46 16 -26 14 46 129 15 41 -26 9 9 -0.61
129 25 54 -24 27 51 16 24 2 35 50 -42 129 11 40 -24 28 40 129 40 4 -24 27 4 128 42 26 -24 30 23 130 8 47 -24 25 32 -0.61
130 14 20 -22 47 3 16 24 20 36 50 -43 130 0 32 -22 47 45 130 28 5 -22 46 22 129 32 11 -22 49 16 130 55 58 -22 45 2 -0.61
130 57 35 -21 9 2 16 24 38 38 51 -45 130 44 8 -21 9 39 131 10 58 -21 8 26 130 16 33 -21 10 58 131 38 9 -21 7 16 -0.61
131 36 23 -19 33 26 16 24 56 39 51 -46 131 23 15 -19 33 59 131 49 29 -19 32 55 130 56 18 -19 35 9 132 16 3 -19 31 54 -0.61
132 11 21 -18 0 1 16 25 14 41 52 -47 131 58 29 -18 0 30 132 24 11 -17 59 33 131 32 5 -18 1 31 132 50 13 -17 58 40 -0.61
132 42 57 -16 28 31 16 25 32 42 52 -48 132 30 18 -16 28 57 132 55 33 -16 28 7 132 4 24 -16 29 51 133 21 8 -16 27 21 -0.61
133 11 34 -14 58 46 16 25 49 44 53 -49 132 59 8 -14 59 8 133 23 58 -14 58 24 132 33 38 -14 59 56 133 49 9 -14 57 44 -0.61
133 37 32 -13 30 34 16 26 7 45 53 -50 133 25 16 -13 30 53 133 49 45 -13 30 15 133 0 9 -13 31 36 134 14 35 -13 29 39 -0.61
134 1 6 -12 3 46 16 26 25 46 54 -50 133 48 59 -12 4 4 134 13 10 -12 3 30 133 24 11 -12 4 42 134 37 42 -12 2 59 -0.61
134 22 30 -10 38 16 16 26 43 47 55 -51 134 10 32 -10 38 31 134 34 27 -10 38 1 133 46 0 -10 39 5 134 58 43 -10 37 34 -0.61
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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