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Updated: 2007 SEP 15, 21:17 UT
Event Rank : 72
(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 Oct 26 UT, the 32 km diameter asteroid (1036) Ganymed will occult a 9.2 mag star in the constellation Monoceros for observers along a path that may graze the extreme eastern coast of Australia, particularly around the Gold Coast area.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 13.5 mag (the magnitude of the asteroid) for at most 1.9 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 Limit1 Path Limit2 Error Limit1 Error Limit2
E. Longitude Latitude U.T. Alt Az Alt
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
153 43 37 -18 22 59 15 58 6 42 80 -42 153 56 58 -18 20 30 153 30 11 -18 25 29 154 18 12 -18 16 30 153 8 35 -18 29 27
153 54 3 -19 19 48 15 58 13 42 79 -41 154 7 28 -19 17 18 153 40 33 -19 22 18 154 28 50 -19 13 16 153 18 50 -19 26 17
154 3 29 -20 16 48 15 58 19 42 78 -41 154 17 0 -20 14 17 153 49 55 -20 19 19 154 38 29 -20 10 14 153 28 4 -20 23 19
154 11 55 -21 14 1 15 58 26 42 77 -40 154 25 31 -21 11 29 153 58 16 -21 16 32 154 47 9 -21 7 25 153 36 16 -21 20 34
154 19 20 -22 11 28 15 58 32 42 76 -39 154 33 2 -22 8 55 154 5 34 -22 14 0 154 54 49 -22 4 49 153 43 25 -22 18 4
154 25 43 -23 9 10 15 58 39 41 75 -39 154 39 31 -23 6 36 154 11 50 -23 11 43 155 1 29 -23 2 29 153 49 30 -23 15 48
154 31 2 -24 7 8 15 58 45 41 74 -38 154 44 58 -24 4 33 154 17 2 -24 9 42 155 7 7 -24 0 25 153 54 29 -24 13 49
154 35 16 -25 5 24 15 58 52 41 73 -37 154 49 20 -25 2 48 154 21 8 -25 7 59 155 11 41 -24 58 38 153 58 22 -25 12 7
154 38 22 -26 3 59 15 58 58 41 73 -36 154 52 35 -26 1 22 154 24 5 -26 6 36 155 15 11 -25 57 10 154 1 5 -26 10 45
154 40 19 -27 2 55 15 59 5 41 72 -36 154 54 42 -27 0 17 154 25 53 -27 5 32 155 17 33 -26 56 3 154 2 36 -27 9 43
154 41 4 -28 2 12 15 59 11 40 71 -35 154 55 37 -27 59 33 154 26 27 -28 4 50 155 18 44 -27 55 18 154 2 53 -28 9 3
154 40 33 -29 1 52 15 59 18 40 70 -34 154 55 18 -28 59 12 154 25 45 -29 4 32 155 18 43 -28 54 55 154 1 53 -29 8 47
154 38 44 -30 1 58 15 59 24 40 69 -34 154 53 40 -29 59 17 154 23 42 -30 4 39 155 17 25 -29 54 58 153 59 30 -30 8 55
154 35 31 -31 2 30 15 59 31 39 69 -33 154 50 41 -30 59 48 154 20 16 -31 5 12 155 14 47 -30 55 27 153 55 41 -31 9 30
154 30 50 -32 3 30 15 59 37 39 68 -32 154 46 15 -32 0 47 154 15 20 -32 6 14 155 10 44 -31 56 24 153 50 22 -32 10 34
154 24 35 -33 5 1 15 59 44 38 67 -32 154 40 16 -33 2 16 154 8 49 -33 7 45 155 5 10 -32 57 51 153 43 25 -33 12 7
154 16 41 -34 7 3 15 59 50 38 67 -31 154 32 39 -34 4 17 154 0 38 -34 9 49 154 58 0 -33 59 50 153 34 44 -34 14 13
154 7 0 -35 9 40 15 59 57 37 66 -30 154 23 16 -35 6 52 153 50 37 -35 12 27 154 49 7 -35 2 23 153 24 13 -35 16 53
153 55 23 -36 12 52 16 0 3 37 65 -30 154 12 0 -36 10 4 153 38 39 -36 15 41 154 38 23 -36 5 33 153 11 41 -36 20 9
153 41 41 -37 16 44 16 0 10 36 65 -29 153 58 40 -37 13 53 153 24 34 -37 19 33 154 25 39 -37 9 20 152 56 59 -37 24 4
153 25 42 -38 21 16 16 0 16 36 64 -28 153 43 7 -38 18 24 153 8 11 -38 24 7 154 10 44 -38 13 49 152 39 55 -38 28 39
153 7 15 -39 26 31 16 0 23 35 64 -28 153 25 7 -39 23 38 152 49 16 -39 29 24 153 53 26 -39 19 1 152 20 15 -39 33 59
152 46 4 -40 32 33 16 0 29 34 63 -27 153 4 25 -40 29 39 152 27 35 -40 35 27 153 33 31 -40 24 59 151 57 44 -40 40 4
152 21 50 -41 39 25 16 0 36 34 63 -26 152 40 45 -41 36 29 152 2 48 -41 42 20 153 10 43 -41 31 46 151 32 2 -41 46 59
151 54 14 -42 47 8 16 0 42 33 63 -26 152 13 45 -42 44 11 151 34 34 -42 50 5 152 44 41 -42 39 26 151 2 47 -42 54 46
151 22 51 -43 55 47 16 0 49 32 63 -25 151 43 3 -43 52 48 151 2 29 -43 58 45 152 15 2 -43 48 1 150 29 34 -44 3 28
150 47 10 -45 5 25 16 0 55 31 63 -24 151 8 8 -45 2 25 150 26 1 -45 8 24 151 41 19 -44 57 36 149 51 49 -45 13 10
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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