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Updated: 2008 FEB 03, 23:55 UT
Event Rank : 10
(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 2008 Mar 08 UT, the 16 km diameter asteroid (2728) Yatskiv will occult a 10.1 mag star in the constellation Gemini for observers along a narrow path of considerable uncertainty across Australia from Cape Howe on the Victorian/NewSouthWales border to South of Broome in Western Australia. The one sigma uncertainty includes most of eastern Victoria and southern and western New South Wales.
In the case of an occultation, the combined light of the asteroid and the star will drop by 7.1 mag to 17.2 mag (the magnitude of the asteroid) for at most 4.0 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
152 54 38 -40 0 0 10 46 5 32 357 -27 153 6 13 152 43 1 155 43 57 150 1 39
151 35 40 -39 0 0 10 46 34 33 358 -27 151 47 13 151 24 5 154 24 20 148 43 11
150 15 54 -38 0 0 10 47 5 34 359 -27 150 27 26 150 4 22 153 4 6 147 23 45
148 55 16 -37 0 0 10 47 37 35 1 -26 149 6 47 148 43 44 151 43 10 146 3 13
147 33 38 -36 0 0 10 48 11 36 2 -26 147 45 9 147 22 6 150 21 24 144 41 31
146 10 54 -35 0 0 10 48 45 37 4 -26 146 22 25 145 59 21 148 58 44 143 18 30
144 46 56 -34 0 0 10 49 21 38 5 -25 144 58 29 144 35 22 147 35 2 141 54 3
143 21 38 -33 0 0 10 49 57 39 7 -24 143 33 13 143 10 2 146 10 12 140 28 2
141 54 51 -32 0 0 10 50 35 40 9 -24 142 6 30 141 43 11 144 44 5 139 0 18
140 26 27 -31 0 0 10 51 15 41 10 -23 140 38 10 140 14 43 143 16 35 137 30 41
138 56 16 -30 0 0 10 51 55 42 12 -22 139 8 4 138 44 27 141 47 32 135 59 1
137 24 9 -29 0 0 10 52 37 42 14 -22 137 36 3 137 12 13 140 16 48 134 25 6
135 49 53 -28 0 0 10 53 20 43 16 -21 136 1 54 135 37 49 138 44 13 132 48 42
134 13 15 -27 0 0 10 54 5 44 18 -20 134 25 26 134 1 2 137 9 35 131 9 34
132 34 2 -26 0 0 10 54 51 44 20 -19 132 46 24 132 21 39 135 32 42 129 27 25
130 51 57 -25 0 0 10 55 38 44 23 -18 131 4 31 130 39 21 133 53 21 127 41 54
129 6 41 -24 0 0 10 56 27 45 25 -17 129 19 29 128 53 50 132 11 16 125 52 37
127 17 52 -23 0 0 10 57 18 45 27 -15 127 30 56 127 4 44 130 26 9 123 59 7
125 25 2 -22 0 0 10 58 10 45 30 -14 125 38 27 125 11 35 128 37 39 122 0 48
123 27 42 -21 0 0 10 59 5 45 32 -13 123 41 29 123 13 51 126 45 22 119 56 57
121 25 12 -20 0 0 11 0 1 45 35 -11 121 39 27 121 10 54 124 48 48 117 46 42
Latitude Latitude Latitude Latitude
120 0 0 -19 19 52 11 0 40 45 37 -10 -19 13 6 -19 26 39 -17 41 32 -21 1 26
119 0 0 -18 52 24 11 1 7 45 38 -9 -18 45 40 -18 59 9 -17 14 36 -20 33 22
118 0 0 -18 25 35 11 1 34 45 39 -9 -18 18 54 -18 32 18 -16 48 19 -20 5 59
117 0 0 -17 59 26 11 2 1 44 40 -8 -17 52 47 -18 6 6 -16 22 40 -19 39 16
Uncertainty in time = +/- 28 secs
[Prediction of 2008 Feb 3.0]
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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