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Updated: 2007 MAY 12, 01:59 UT
Event Rank : 6
(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 2007 Jun 08 UT, the 12 km diameter asteroid (2384) Schulhof will occult a 9.5 mag star in the constellation Sagittarius for observers along a narrow path of considerable uncertainty across western Western Australia from about Port Headland to Geraldton.
In the case of an occultation, the combined light of the asteroid and the star will drop by 6.6 mag to 16.1 mag (the magnitude of the asteroid) for at most 2.0 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
120 44 40 -17 0 0 20 37 26 60 214 -24 120 40 57 120 48 23 119 17 49 122 11 28
120 16 55 -18 0 0 20 37 43 61 214 -25 120 13 11 120 20 40 118 49 35 121 44 12
119 49 2 -19 0 0 20 38 1 62 215 -25 119 45 16 119 52 47 118 21 10 121 16 48
119 20 57 -20 0 0 20 38 19 63 215 -26 119 17 10 119 24 44 117 52 32 120 49 17
118 52 42 -21 0 0 20 38 36 64 216 -27 118 48 53 118 56 30 117 23 40 120 21 37
118 24 14 -22 0 0 20 38 55 65 217 -27 118 20 24 118 28 4 116 54 34 119 53 46
117 55 33 -23 0 0 20 39 13 66 218 -28 117 51 41 117 59 25 116 25 12 119 25 45
117 26 37 -24 0 0 20 39 31 67 218 -29 117 22 44 117 30 31 115 55 33 118 57 31
116 57 26 -25 0 0 20 39 49 68 219 -29 116 53 30 117 1 22 115 25 36 118 29 5
116 27 58 -26 0 0 20 40 8 69 221 -30 116 24 0 116 31 55 114 55 19 118 0 24
115 58 11 -27 0 0 20 40 27 70 222 -30 115 54 11 116 2 11 114 24 41 117 31 28
115 28 5 -28 0 0 20 40 46 71 223 -31 115 24 3 115 32 7 113 53 41 117 2 14
Latitude Latitude Latitude Latitude
114 0 0 -30 51 32 20 41 40 74 228 -32 -30 43 36 -30 59 29 -27 47 50 -33 59 32
113 0 0 -32 44 44 20 42 17 75 232 -33 -32 36 50 -32 52 39 -29 42 3 -35 51 47
112 0 0 -34 34 48 20 42 53 77 237 -34 -34 26 57 -34 42 40 -31 33 18 -37 40 44
111 0 0 -36 21 38 20 43 28 78 243 -35 -36 13 50 -36 29 26 -33 21 26 -39 26 16
110 0 0 -38 5 7 20 44 2 80 250 -36 -37 57 22 -38 12 51 -35 6 22 -41 8 19
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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