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Updated: 2005 DEC 29, 20:07 UT
Event Rank : 99
(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 2006 Jan 28 UT, the 123 km diameter asteroid (134) Sophrosyne will occult a 10.3 mag star in the constellation Auriga for observers along a path passing directly over Darwin, Northern Territory and then across into central Western Australia.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 12.1 mag (the magnitude of the asteroid) for at most 16.8 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, 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 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
119 17 25 -31 0 0 11 25 8 12 28 -5 118 31 17 120 3 30 118 12 49 120 21 55
119 58 19 -30 0 0 11 25 4 13 27 -6 119 12 41 120 43 54 118 54 25 121 2 8
120 38 43 -29 0 0 11 25 0 15 27 -7 119 53 33 121 23 51 119 35 29 121 41 54
121 18 40 -28 0 0 11 24 55 16 27 -8 120 33 56 122 3 22 120 16 3 122 21 15
121 58 12 -27 0 0 11 24 50 17 26 -9 121 13 54 122 42 30 120 56 10 123 0 13
122 37 22 -26 0 0 11 24 45 18 26 -9 121 53 27 123 21 18 121 35 53 123 38 52
123 16 13 -25 0 0 11 24 39 19 26 -10 122 32 39 123 59 47 122 15 13 124 17 12
123 54 46 -24 0 0 11 24 33 20 26 -11 123 11 32 124 38 0 122 54 15 124 55 17
124 33 3 -23 0 0 11 24 27 21 25 -12 123 50 8 125 15 59 123 32 58 125 33 9
125 11 7 -22 0 0 11 24 20 23 25 -13 124 28 30 125 53 45 124 11 27 126 10 49
125 48 59 -21 0 0 11 24 14 24 25 -14 125 6 38 126 31 21 124 49 42 126 48 19
126 26 42 -20 0 0 11 24 6 25 24 -15 125 44 35 127 8 49 125 27 45 127 25 41
127 4 16 -19 0 0 11 23 59 26 24 -16 126 22 24 127 46 10 126 5 39 128 2 57
127 41 44 -18 0 0 11 23 51 27 24 -17 127 0 4 128 23 26 126 43 25 128 40 8
128 19 8 -17 0 0 11 23 43 28 24 -18 127 37 40 129 0 39 127 21 5 129 17 16
128 56 29 -16 0 0 11 23 34 29 23 -19 128 15 11 129 37 50 127 58 40 129 54 23
129 33 48 -15 0 0 11 23 25 31 23 -20 128 52 39 130 15 0 128 36 12 130 31 30
130 11 8 -14 0 0 11 23 16 32 23 -21 129 30 7 130 52 12 129 13 44 131 8 38
130 48 29 -13 0 0 11 23 7 33 23 -22 130 7 35 131 29 26 129 51 15 131 45 50
131 25 54 -12 0 0 11 22 57 34 23 -23 130 45 6 132 6 45 130 28 48 132 23 7
132 3 23 -11 0 0 11 22 47 35 22 -24 131 22 40 132 44 10 131 6 24 133 0 29
132 40 58 -10 0 0 11 22 37 36 22 -25 132 0 20 133 21 41 131 44 6 133 38 0
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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