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Updated: 2005 NOV 15, 01:42 UT
Event Rank : 98
(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 26 UT, the 149 km diameter asteroid (117) Lomia will occult a 10.6 mag star in the constellation Capricornus for observers along a path across south-eastern South Australia, passing directly over Adelaide across north-western New South Wales and then south-east Queensland passing direcly over Bundaberg.
In the case of an occultation, the combined light of the asteroid and the star will drop by 3.1 mag to 13.7 mag (the magnitude of the asteroid) for at most 5.6 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
135 57 35 -37 34 47 12 13 51 31 267 -22 134 30 8 -37 19 4 137 28 53 -37 49 15 133 29 22 -37 7 3 138 37 14 -37 58 48 1.21
136 59 30 -36 41 4 12 13 55 30 266 -23 135 31 13 -36 26 11 138 31 47 -36 54 37 134 29 56 -36 14 43 139 40 58 -37 3 27 1.21
138 3 26 -35 46 33 12 13 59 29 265 -24 136 34 7 -35 32 35 139 36 57 -35 59 7 135 32 11 -35 21 43 140 47 9 -36 7 10 1.22
139 9 41 -34 51 10 12 14 3 28 264 -26 137 39 6 -34 38 10 140 44 43 -35 2 38 136 36 22 -34 27 58 141 56 12 -35 9 49 1.22
140 18 35 -33 54 45 12 14 7 27 263 -27 138 46 27 -33 42 50 141 55 29 -34 5 1 137 42 44 -33 33 20 143 8 34 -34 11 13 1.22
141 30 35 -32 57 9 12 14 11 26 262 -28 139 56 32 -32 46 26 143 9 47 -33 6 3 138 51 38 -32 37 43 144 24 50 -33 11 9 1.23
142 46 12 -31 58 9 12 14 15 24 261 -30 141 9 48 -31 48 47 144 28 15 -32 5 29 140 3 28 -31 40 56 145 45 47 -32 9 17 1.23
144 6 7 -30 57 29 12 14 19 23 260 -31 142 26 48 -30 49 41 145 51 46 -31 2 59 141 18 42 -30 42 50 147 12 26 -31 5 15 1.23
145 31 15 -29 54 49 12 14 23 22 259 -33 143 48 17 -29 48 50 147 21 29 -29 58 7 142 37 58 -29 43 8 148 46 16 -29 58 28 1.24
147 2 50 -28 49 39 12 14 27 20 257 -34 145 15 11 -28 45 53 148 59 6 -28 50 12 144 2 6 -28 41 32 150 29 27 -28 48 7 1.25
148 42 41 -27 41 18 12 14 31 18 256 -36 146 48 52 -27 40 18 150 47 11 -27 38 18 145 32 13 -27 37 36 152 25 25 -27 32 54 1.26
150 33 33 -26 28 44 12 14 35 16 255 -38 148 31 16 -26 31 21 152 49 58 -26 20 47 147 9 51 -26 30 45 154 40 27 -26 10 26 1.27
152 40 8 -25 10 10 12 14 39 14 254 -40 150 25 25 -25 17 54 155 15 38 -24 54 36 148 57 23 -25 20 5 157 28 15 -24 35 36 1.30
155 11 40 -23 42 8 12 14 43 12 253 -42 152 36 37 -23 57 56 158 24 21 -23 12 10 150 58 37 -24 4 10 161 36 54 -22 30 25 1.34
158 32 29 -21 55 32 12 14 47 8 252 -45 155 15 38 -22 27 25 164 12 57 -20 30 1 153 20 34 -22 40 21 ... .. .. .. .. .. 1.47
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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