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Updated: 2006 FEB 03, 22:25 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 2006 Feb 08 UT, the 98 km diameter asteroid (148) Gallia will occult a 12.1 mag star in the constellation Monoceros for observers along a path running up the eastern coast of Australia, beginning near Eden, passing near Canberra and Sydney, directly over Katoomba in the Blue Mountains and Coonabarrabran in central NSW then into Queensland past Townsville and leaving the Australian mainland near Cairns
In the case of an occultation, the combined light of the asteroid and the star will drop by a relatively minor 0.6 mag to 11.7 mag (the magnitude of the asteroid) for at most 7.4 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
151 24 50 -45 0 0 10 20 58 41 18 -11 152 5 11 150 44 22 152 33 22 150 15 58
151 19 36 -44 0 0 10 21 4 42 18 -12 151 59 17 150 39 49 152 27 0 150 11 53
151 13 55 -43 0 0 10 21 10 43 18 -12 151 52 58 150 34 45 152 20 14 150 7 16
151 7 46 -42 0 0 10 21 16 44 19 -13 151 46 13 150 29 13 152 13 4 150 2 9
151 1 12 -41 0 0 10 21 23 45 19 -13 151 39 5 150 23 12 152 5 32 149 56 33
150 54 12 -40 0 0 10 21 29 46 20 -14 151 31 33 150 16 46 151 57 38 149 50 29
150 46 49 -39 0 0 10 21 36 46 20 -14 151 23 39 150 9 53 151 49 22 149 43 58
150 39 2 -38 0 0 10 21 42 47 21 -15 151 15 23 150 2 35 151 40 46 149 37 1
150 30 52 -37 0 0 10 21 49 48 21 -15 151 6 46 149 54 53 151 31 50 149 29 38
150 22 21 -36 0 0 10 21 56 49 22 -16 150 57 48 149 46 48 151 22 34 149 21 51
150 13 28 -35 0 0 10 22 3 50 22 -16 150 48 30 149 38 20 151 12 58 149 13 41
150 4 14 -34 0 0 10 22 10 51 23 -16 150 38 52 149 29 29 151 3 4 149 5 7
149 54 39 -33 0 0 10 22 17 52 24 -17 150 28 55 149 20 17 150 52 52 148 56 10
149 44 44 -32 0 0 10 22 24 53 24 -17 150 18 39 149 10 43 150 42 21 148 46 51
149 34 29 -31 0 0 10 22 31 54 25 -18 150 8 4 149 0 48 150 31 32 148 37 10
149 23 54 -30 0 0 10 22 38 54 26 -18 149 57 10 148 50 32 150 20 25 148 27 7
149 13 0 -29 0 0 10 22 46 55 27 -18 149 45 58 148 39 56 150 9 0 148 16 44
149 1 46 -28 0 0 10 22 53 56 28 -19 149 34 28 148 28 59 149 57 18 148 5 59
148 50 13 -27 0 0 10 23 1 57 29 -19 149 22 39 148 17 42 149 45 18 147 54 53
148 38 22 -26 0 0 10 23 8 58 30 -19 149 10 33 148 6 6 149 33 1 147 43 27
148 26 11 -25 0 0 10 23 16 58 31 -20 148 58 8 147 54 9 149 20 27 147 31 41
148 13 42 -24 0 0 10 23 24 59 32 -20 148 45 25 147 41 53 149 7 35 147 19 34
148 0 53 -23 0 0 10 23 32 60 33 -20 148 32 24 147 29 17 148 54 25 147 7 7
147 47 46 -22 0 0 10 23 40 61 35 -21 148 19 6 147 16 22 148 40 58 146 54 19
147 34 20 -21 0 0 10 23 48 61 36 -21 148 5 29 147 3 6 148 27 14 146 41 11
147 20 35 -20 0 0 10 23 56 62 37 -21 147 51 33 146 49 31 148 13 12 146 27 43
147 6 31 -19 0 0 10 24 4 63 39 -22 147 37 20 146 35 36 147 58 51 146 13 55
146 52 7 -18 0 0 10 24 12 63 40 -22 147 22 48 146 21 21 147 44 13 145 59 46
146 37 24 -17 0 0 10 24 20 64 42 -22 147 7 57 146 6 46 147 29 17 145 45 16
146 22 21 -16 0 0 10 24 29 65 44 -22 146 52 47 145 51 50 147 14 2 145 30 25
146 6 58 -15 0 0 10 24 37 65 46 -22 146 37 18 145 36 34 146 58 29 145 15 13
145 51 16 -14 0 0 10 24 45 66 48 -23 146 21 29 145 20 56 146 42 36 144 59 40
145 35 12 -13 0 0 10 24 54 66 50 -23 146 5 21 145 4 58 146 26 24 144 43 45
145 18 48 -12 0 0 10 25 2 67 52 -23 145 48 53 144 48 38 146 9 53 144 27 28
145 2 3 -11 0 0 10 25 11 67 54 -23 145 32 4 144 31 57 145 53 1 144 10 49
144 44 56 -10 0 0 10 25 19 67 57 -23 145 14 54 144 14 53 145 35 49 143 53 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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