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Updated: 2008 DEC 24, 06:45 UT
Event Rank : 97
(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 2009 Jan 09 UT, the 111 km diameter asteroid (751) Faina will occult a 11.5 mag star in the constellation Cetus for observers along a path across South Australia and central Queensland.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 13.3 mag (the magnitude of the asteroid) for at most 3.9 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
126 1 2 -37 17 0 12 59 14 28 282 -19 124 48 33 -36 58 12 127 16 39 -37 35 27 123 55 23 -36 43 42 128 16 25 -37 49 12
126 36 33 -36 37 20 12 59 17 28 281 -20 125 23 56 -36 18 48 127 52 21 -36 55 30 124 30 41 -36 4 30 128 52 18 -37 9 2
127 13 5 -35 57 43 12 59 20 28 280 -21 126 0 15 -35 39 27 128 29 9 -36 15 37 125 6 51 -35 25 21 129 29 21 -36 28 55
127 50 39 -35 18 10 12 59 23 27 279 -22 126 37 31 -35 0 10 129 7 5 -35 35 45 125 43 56 -34 46 15 130 7 37 -35 48 50
128 29 21 -34 38 37 12 59 26 27 279 -23 127 15 49 -34 20 54 129 46 15 -34 55 55 126 22 0 -34 7 12 130 47 12 -35 8 45
129 9 13 -33 59 5 12 59 29 26 278 -24 127 55 13 -33 41 40 130 26 42 -34 16 5 127 1 4 -33 28 10 131 28 11 -34 28 40
129 50 22 -33 19 32 12 59 32 26 277 -24 128 35 47 -33 2 25 131 8 33 -33 36 13 127 41 15 -32 49 7 132 10 40 -33 48 32
130 32 53 -32 39 58 12 59 35 25 276 -25 129 17 36 -32 23 8 131 51 55 -32 56 18 128 22 36 -32 10 4 132 54 46 -33 8 21
131 16 53 -32 0 19 12 59 38 25 276 -26 130 0 45 -31 43 49 132 36 54 -32 16 18 129 5 13 -31 30 59 133 40 39 -32 28 4
132 2 28 -31 20 36 12 59 41 24 275 -27 130 45 22 -31 4 26 133 23 40 -31 36 13 129 49 11 -30 51 50 134 28 27 -31 47 39
132 49 49 -30 40 45 12 59 44 24 274 -28 131 31 34 -30 24 57 134 12 23 -30 55 58 130 34 38 -30 12 36 135 18 25 -31 7 5
133 39 5 -30 0 46 12 59 48 23 273 -29 132 19 29 -29 45 21 135 3 15 -30 15 33 131 21 41 -29 33 16 136 10 45 -30 26 18
134 30 29 -29 20 36 12 59 51 22 273 -30 133 9 19 -29 5 36 135 56 33 -29 34 55 132 10 30 -28 53 48 137 5 47 -29 45 16
135 24 16 -28 40 12 12 59 54 21 272 -31 134 1 16 -28 25 39 136 52 34 -28 54 0 133 1 16 -28 14 10 138 3 52 -29 3 54
136 20 44 -27 59 31 12 59 57 21 271 -32 134 55 35 -27 45 28 137 51 43 -28 12 45 133 54 11 -27 34 19 139 5 30 -28 22 9
137 20 16 -27 18 30 13 0 0 20 271 -33 135 52 33 -27 5 0 138 54 27 -27 31 5 134 49 31 -26 54 13 140 11 16 -27 39 53
138 23 21 -26 37 3 13 0 3 19 270 -34 136 52 34 -26 24 10 140 1 26 -26 48 53 135 47 36 -26 13 48 141 22 2 -26 56 59
139 30 37 -25 55 5 13 0 6 18 269 -35 137 56 6 -25 42 55 141 13 33 -26 6 1 136 48 50 -25 33 1 142 38 55 -26 13 17
140 42 53 -25 12 28 13 0 9 17 268 -37 139 3 46 -25 1 9 142 31 58 -25 22 19 137 53 41 -24 51 47 144 3 38 -25 28 30
142 1 20 -24 29 1 13 0 12 15 268 -38 140 16 23 -24 18 43 143 58 30 -24 37 29 139 2 51 -24 9 59 145 38 51 -24 42 15
143 27 41 -23 44 27 13 0 15 14 267 -39 141 35 7 -23 35 28 145 35 58 -23 51 6 140 17 12 -23 27 30 147 29 14 -23 53 48
145 4 36 -22 58 24 13 0 18 13 266 -40 143 1 37 -22 51 7 147 29 29 -23 2 24 141 37 57 -22 44 7 149 44 36 -23 1 42
146 56 49 -22 10 6 13 0 21 11 265 -42 144 38 28 -22 5 17 149 49 55 -22 9 44 143 6 57 -21 59 35 152 54 59 -22 1 26
149 14 9 -21 18 7 13 0 24 9 264 -44 146 30 13 -21 17 17 153 13 21 -21 7 42 144 47 6 -21 13 25 ... .. .. .. .. ..
152 26 27 -20 17 58 13 0 27 5 263 -46 148 46 4 -20 25 43 ... .. .. .. .. .. 146 43 32 -20 24 53 ... .. .. .. .. ..
Uncertainty in time = +/- 2 secs
[Prediction of 2008 Dec 24.0]
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