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Updated: 2011 OCT 13, 19:16 UT
Event Rank : 25
(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 2011 Nov 30 UT, the 18 km diameter asteroid (1660) Wood will occult a 10.2 mag star in the constellation Puppis for observers along a north- to-south path across Western Australia from Halls Creek to Eucla.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.5 mag (the magnitude of the asteroid) for at most 1.3 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, 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 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
124 26 55 - 7 47 20 16 15 6 46 99 -59 124 33 25 - 7 46 28 124 20 24 - 7 48 12 125 8 9 - 7 41 43 123 45 11 - 7 52 49
124 49 41 - 8 53 31 16 15 15 47 98 -57 124 56 11 - 8 52 38 124 43 12 - 8 54 23 125 30 52 - 8 47 50 124 8 2 - 8 59 3
125 11 15 - 9 59 28 16 15 24 47 97 -56 125 17 44 - 9 58 34 125 4 46 -10 0 21 125 52 23 - 9 53 43 124 29 38 -10 5 5
125 31 39 -11 5 14 16 15 33 48 96 -55 125 38 8 -11 4 20 125 25 10 -11 6 8 126 12 47 -10 59 25 124 50 2 -11 10 54
125 50 56 -12 10 50 16 15 42 48 94 -54 125 57 25 -12 9 56 125 44 26 -12 11 45 126 32 5 -12 4 58 125 9 17 -12 16 35
126 9 7 -13 16 19 16 15 51 48 93 -53 126 15 37 -13 15 24 126 2 37 -13 17 14 126 50 20 -13 10 23 125 27 26 -13 22 7
126 26 16 -14 21 42 16 16 0 49 92 -52 126 32 46 -14 20 47 126 19 45 -14 22 38 127 7 34 -14 15 43 125 44 29 -14 27 34
126 42 23 -15 27 1 16 16 9 49 91 -51 126 48 55 -15 26 5 126 35 51 -15 27 58 127 23 49 -15 20 58 126 0 30 -15 32 56
126 57 31 -16 32 18 16 16 18 49 89 -50 127 4 3 -16 31 21 126 50 57 -16 33 15 127 39 5 -16 26 12 126 15 29 -16 38 16
127 11 39 -17 37 34 16 16 27 50 88 -48 127 18 14 -17 36 36 127 5 4 -17 38 31 127 53 23 -17 31 24 126 29 27 -17 43 35
127 24 49 -18 42 50 16 16 36 50 87 -47 127 31 26 -18 41 53 127 18 12 -18 43 48 128 6 46 -18 36 38 126 42 25 -18 48 55
127 37 2 -19 48 10 16 16 45 50 85 -46 127 43 41 -19 47 11 127 30 23 -19 49 8 128 19 12 -19 41 54 126 54 23 -19 54 17
127 48 17 -20 53 33 16 16 54 50 84 -45 127 54 58 -20 52 34 127 41 36 -20 54 31 128 30 43 -20 47 14 127 5 23 -20 59 44
127 58 35 -21 59 2 16 17 3 50 82 -44 128 5 19 -21 58 2 127 51 51 -22 0 1 128 41 19 -21 52 40 127 15 23 -22 5 16
128 7 56 -23 4 38 16 17 12 50 81 -43 128 14 43 -23 3 38 128 1 9 -23 5 37 128 50 59 -22 58 13 127 24 24 -23 10 55
128 16 18 -24 10 23 16 17 22 50 80 -42 128 23 9 -24 9 23 128 9 28 -24 11 23 128 59 43 -24 3 55 127 32 24 -24 16 43
128 23 42 -25 16 19 16 17 31 50 78 -41 128 30 36 -25 15 18 128 16 47 -25 17 19 129 7 30 -25 9 47 127 39 24 -25 22 42
128 30 6 -26 22 27 16 17 40 50 77 -40 128 37 4 -26 21 25 128 23 7 -26 23 28 129 14 19 -26 15 52 127 45 21 -26 28 52
128 35 28 -27 28 48 16 17 49 50 76 -39 128 42 31 -27 27 47 128 28 25 -27 29 50 129 20 10 -27 22 11 127 50 15 -27 35 17
128 39 48 -28 35 26 16 17 58 50 74 -38 128 46 55 -28 34 24 128 32 40 -28 36 28 129 24 59 -28 28 46 127 54 3 -28 41 58
128 43 2 -29 42 21 16 18 7 49 73 -36 128 50 14 -29 41 19 128 35 49 -29 43 24 129 28 47 -29 35 38 127 56 44 -29 48 56
128 45 8 -30 49 36 16 18 16 49 72 -35 128 52 26 -30 48 33 128 37 49 -30 50 39 129 31 29 -30 42 50 127 58 14 -30 56 13
128 46 4 -31 57 11 16 18 25 49 70 -34 128 53 28 -31 56 8 128 38 39 -31 58 15 129 33 3 -31 50 23 127 58 30 -32 3 51
128 45 46 -33 5 10 16 18 34 48 69 -33 128 53 17 -33 4 7 128 38 14 -33 6 14 129 33 27 -32 58 19 127 57 29 -33 11 53
128 44 9 -34 13 35 16 18 43 48 68 -32 128 51 47 -34 12 30 128 36 30 -34 14 39 129 32 36 -34 6 40 127 55 6 -34 20 20
128 41 10 -35 22 26 16 18 52 47 67 -31 128 48 56 -35 21 22 128 33 23 -35 23 31 129 30 25 -35 15 29 127 51 16 -35 29 14
128 36 42 -36 31 48 16 19 1 47 66 -30 128 44 36 -36 30 43 128 28 47 -36 32 53 129 26 51 -36 24 48 127 45 53 -36 38 38
128 30 40 -37 41 41 16 19 10 46 65 -29 128 38 43 -37 40 36 128 22 36 -37 42 47 129 21 46 -37 34 39 127 38 52 -37 48 34
128 22 56 -38 52 9 16 19 19 46 64 -28 128 31 9 -38 51 3 128 14 41 -38 53 15 129 15 5 -38 45 4 127 30 3 -38 59 4
128 13 21 -40 3 14 16 19 28 45 63 -27 128 21 45 -40 2 8 128 4 56 -40 4 20 129 6 38 -39 56 6 127 19 18 -40 10 11
Uncertainty in time = +/- 4 secs
Prediction of 2011 Oct 14.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
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[Asteroid Occultation Results]
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