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Updated: 2005 JUL 24, 01:40 UT
Event Rank : 94
(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 Aug 14 UT, the 118 km diameter asteroid (772) Tanete will occult a 11.5 mag star in the constellation Sculptor 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 2.2 mag to 13.6 mag (the magnitude of the asteroid) for at most 10.5 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 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
141 42 55 -10 0 0 18 59 33 60 206 -26 141 8 7 142 17 43 140 36 6 142 49 43
141 18 45 -11 0 0 18 59 42 61 206 -27 140 43 50 141 53 39 140 11 42 142 25 45
140 54 28 -12 0 0 18 59 51 62 207 -27 140 19 25 141 29 30 139 47 10 142 1 43
140 30 4 -13 0 0 19 0 0 63 207 -28 139 54 52 141 5 14 139 22 29 141 37 35
140 5 32 -14 0 0 19 0 9 64 207 -28 139 30 11 140 40 51 138 57 39 141 13 21
139 40 51 -15 0 0 19 0 19 65 208 -29 139 5 20 140 16 20 138 32 38 140 48 59
139 16 0 -16 0 0 19 0 28 66 208 -29 138 40 18 139 51 40 138 7 26 140 24 29
138 50 58 -17 0 0 19 0 38 67 208 -30 138 15 4 139 26 50 137 42 1 139 59 49
138 25 45 -18 0 0 19 0 48 68 209 -30 137 49 38 139 1 49 137 16 23 139 35 0
138 0 18 -19 0 0 19 0 58 69 210 -31 137 23 58 138 36 37 136 50 31 139 9 59
137 34 38 -20 0 0 19 1 7 70 210 -31 136 58 3 138 11 11 136 24 22 138 44 46
137 8 43 -21 0 0 19 1 17 71 211 -31 136 31 52 137 45 31 135 57 57 138 19 20
136 42 31 -22 0 0 19 1 27 72 212 -32 136 5 24 137 19 35 135 31 13 137 53 40
136 16 2 -23 0 0 19 1 37 73 212 -32 135 38 37 136 53 24 135 4 10 137 27 44
135 49 14 -24 0 0 19 1 47 74 213 -33 135 11 31 136 26 54 134 36 46 137 1 31
135 22 6 -25 0 0 19 1 58 75 214 -33 134 44 3 136 0 5 134 9 0 136 35 0
134 54 36 -26 0 0 19 2 8 76 216 -33 134 16 12 135 32 56 133 40 50 136 8 10
134 26 43 -27 0 0 19 2 18 77 217 -34 133 47 58 135 5 26 133 12 14 135 40 59
133 58 26 -28 0 0 19 2 28 78 219 -34 133 19 17 134 37 31 132 43 12 135 13 26
133 29 42 -29 0 0 19 2 39 79 221 -35 132 50 8 134 9 12 132 13 41 134 45 29
133 0 30 -30 0 0 19 2 49 80 223 -35 132 20 30 133 40 26 131 43 38 134 17 7
132 30 49 -31 0 0 19 3 0 81 226 -35 131 50 21 133 11 11 131 13 3 133 48 17
132 0 35 -32 0 0 19 3 10 82 230 -36 131 19 38 132 41 26 130 41 53 133 18 58
Latitude Latitude Latitude Latitude
131 0 0 -33 56 54 19 3 31 84 240 -36 -32 37 45 -35 16 28 -31 25 16 -36 30 6
130 0 0 -35 48 16 19 3 50 85 258 -37 -34 30 15 -37 6 42 -33 18 48 -38 19 17
129 0 0 -37 35 12 19 4 9 85 285 -37 -36 18 21 -38 52 28 -35 7 59 -40 3 57
128 0 0 -39 17 44 19 4 28 85 314 -37 -38 2 6 -40 33 47 -36 52 50 -41 44 8
127 0 0 -40 55 55 19 4 45 84 336 -38 -39 41 31 -42 10 42 -38 33 22 -43 19 54
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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