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Updated: 2009 SEP 22, 05:24 UT
Event Rank : 43
(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 Nov 15 UT, the 24 km diameter asteroid (1372) Haremari will occult a 11.0 mag star in the constellation Andromeda for observers along a path across Australia beginning near Cairns in Queensland, passing through central Australia, and in Western Australia passing near Kalgoorlie, Southern Cross, Katanning and Walpole.
In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 14.4 mag (the magnitude of the asteroid) for at most 2.6 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 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
115 2 4 -38 0 0 15 19 20 10 353 -33 114 38 50 115 25 36 113 29 18 116 39 25
115 30 28 -37 0 0 15 19 13 11 353 -34 115 7 11 115 54 1 113 57 36 117 7 59
116 2 4 -36 0 0 15 19 7 12 352 -35 115 38 42 116 25 43 114 28 54 117 40 1
116 36 56 -35 0 0 15 18 59 13 352 -36 116 13 26 117 0 44 115 3 15 118 15 35
117 15 12 -34 0 0 15 18 51 14 351 -37 116 51 30 117 39 14 115 40 46 118 54 50
117 57 1 -33 0 0 15 18 42 15 351 -38 117 33 1 118 21 20 116 21 32 119 37 57
118 42 32 -32 0 0 15 18 32 16 350 -39 118 18 11 119 7 14 117 5 43 120 25 9
119 32 1 -31 0 0 15 18 21 17 349 -40 119 7 13 119 57 11 117 53 31 121 16 46
120 25 47 -30 0 0 15 18 10 18 349 -41 120 0 25 120 51 33 118 45 11 122 13 10
121 24 13 -29 0 0 15 17 57 18 348 -42 120 58 10 121 50 43 119 41 2 123 14 54
122 27 49 -28 0 0 15 17 43 19 347 -43 122 0 55 122 55 14 120 41 27 124 22 37
123 37 18 -27 0 0 15 17 29 20 346 -44 123 9 19 124 5 51 121 46 59 125 37 17
124 53 32 -26 0 0 15 17 13 21 345 -45 124 24 12 125 23 32 122 58 16 127 0 10
126 17 47 -25 0 0 15 16 55 21 344 -46 125 46 43 126 49 40 124 16 12 128 33 11
127 51 51 -24 0 0 15 16 35 22 343 -47 127 18 30 128 26 16 125 42 2 130 19 18
129 38 33 -23 0 0 15 16 13 22 341 -48 129 2 1 130 16 31 127 17 31 132 23 37
131 42 35 -22 0 0 15 15 48 23 340 -49 131 1 18 132 25 58 129 5 22 134 56 26
Latitude Latitude Latitude Latitude
132 0 0 -21 52 21 15 15 45 23 340 -49 -21 33 48 -22 11 11 -20 38 35 -23 10 36
133 0 0 -21 27 27 15 15 33 23 339 -50 -21 9 11 -21 45 59 -20 14 47 -22 44 23
134 0 0 -21 4 41 15 15 21 23 338 -50 -20 46 41 -21 22 57 -19 52 59 -22 20 29
135 0 0 -20 44 0 15 15 9 23 337 -50 -20 26 12 -21 2 1 -19 33 8 -21 58 46
136 0 0 -20 25 18 15 14 57 23 337 -50 -20 7 43 -20 43 8 -19 15 12 -21 39 12
137 0 0 -20 8 35 15 14 46 23 336 -50 -19 51 9 -20 26 14 -18 59 7 -21 21 43
138 0 0 -19 53 46 15 14 35 22 335 -50 -19 36 29 -20 11 16 -18 44 53 -21 6 14
139 0 0 -19 40 50 15 14 24 22 335 -50 -19 23 41 -19 58 12 -18 32 26 -20 52 45
140 0 0 -19 29 46 15 14 13 22 334 -50 -19 12 43 -19 47 1 -18 21 45 -20 41 13
141 0 0 -19 20 31 15 14 2 22 333 -50 -19 3 33 -19 37 41 -18 12 50 -20 31 35
142 0 0 -19 13 4 15 13 51 21 333 -50 -18 56 10 -19 30 10 -18 5 38 -20 23 51
143 0 0 -19 7 25 15 13 41 21 332 -49 -18 50 34 -19 24 28 -18 0 10 -20 18 0
144 0 0 -19 3 33 15 13 30 21 331 -49 -18 46 44 -19 20 35 -17 56 24 -20 14 0
145 0 0 -19 1 28 15 13 20 20 331 -49 -18 44 39 -19 18 29 -17 54 22 -20 11 52
146 0 0 -19 1 10 15 13 10 20 330 -48 -18 44 20 -19 18 11 -17 54 1 -20 11 36
147 0 0 -19 2 38 15 13 1 19 329 -48 -18 45 47 -19 19 41 -17 55 24 -20 13 11
148 0 0 -19 5 54 15 12 51 19 329 -48 -18 49 0 -19 23 0 -17 58 30 -20 16 39
149 0 0 -19 10 58 15 12 42 18 328 -47 -18 54 1 -19 28 8 -18 3 19 -20 22 0
150 0 0 -19 17 51 15 12 33 18 328 -46 -19 0 49 -19 35 6 -18 9 54 -20 29 15
151 0 0 -19 26 36 15 12 24 17 327 -46 -19 9 27 -19 43 57 -18 18 14 -20 38 26
152 0 0 -19 37 12 15 12 16 16 327 -45 -19 19 56 -19 54 41 -18 28 22 -20 49 36
153 0 0 -19 49 43 15 12 7 16 326 -45 -19 32 19 -20 7 21 -18 40 20 -21 2 46
154 0 0 -20 4 11 15 11 59 15 326 -44 -19 46 36 -20 21 59 -18 54 9 -21 17 59
Uncertainty in time = +/- 7 secs
Prediction of 2009 Sep 22.0
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[Observing Details]
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