|
|
Updated: 2010 JUN 10, 04:27 UT
Event Rank : 5
(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 2010 Aug 07 UT, the 13 km diameter asteroid (5330) Senrikyu will occult a 10.5 mag star in the constellation Corona Australis for observers along a very narrow south-to-north path across Western Australia from Esperance to Port Hedland.
In the case of an occultation, the combined light of the asteroid and the star will drop by 5.4 mag to 15.9 mag (the magnitude of the asteroid) for at most 0.8 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: .
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
114 50 20 -10 0 0 12 58 14 57 173 -39 114 54 0 114 46 40 116 35 7 113 5 55
115 4 38 -11 0 0 12 58 8 58 174 -39 115 8 19 115 0 58 116 49 49 113 19 51
115 19 7 -12 0 0 12 58 2 59 174 -40 115 22 49 115 15 26 117 4 43 113 33 55
115 33 48 -13 0 0 12 57 56 60 174 -40 115 37 30 115 30 5 117 19 51 113 48 9
115 48 40 -14 0 0 12 57 50 61 174 -41 115 52 23 115 44 56 117 35 14 114 2 32
116 3 44 -15 0 0 12 57 44 62 174 -41 116 7 29 115 59 59 117 50 50 114 17 5
116 19 1 -16 0 0 12 57 38 63 174 -41 116 22 47 116 15 16 118 6 43 114 31 48
116 34 33 -17 0 0 12 57 31 64 174 -42 116 38 20 116 30 45 118 22 51 114 46 43
116 50 18 -18 0 0 12 57 25 65 175 -42 116 54 7 116 46 30 118 39 16 115 1 50
117 6 19 -19 0 0 12 57 18 66 175 -42 117 10 9 117 2 29 118 55 59 115 17 10
117 22 35 -20 0 0 12 57 12 67 175 -43 117 26 27 117 18 44 119 13 1 115 32 42
117 39 9 -21 0 0 12 57 5 68 175 -43 117 43 2 117 35 16 119 30 23 115 48 29
117 56 0 -22 0 0 12 56 59 69 176 -43 117 59 55 117 52 5 119 48 5 116 4 31
118 13 9 -23 0 0 12 56 52 70 176 -44 118 17 6 118 9 13 120 6 8 116 20 48
118 30 39 -24 0 0 12 56 45 71 176 -44 118 34 37 118 26 40 120 24 34 116 37 22
118 48 28 -25 0 0 12 56 38 72 177 -44 118 52 29 118 44 28 120 43 25 116 54 13
119 6 40 -26 0 0 12 56 32 73 177 -44 119 10 43 119 2 37 121 2 40 117 11 23
119 25 14 -27 0 0 12 56 25 74 178 -44 119 29 20 119 21 9 121 22 21 117 28 52
119 44 13 -28 0 0 12 56 18 75 179 -45 119 48 21 119 40 5 121 42 31 117 46 41
120 3 37 -29 0 0 12 56 11 76 179 -45 120 7 47 119 59 26 122 3 10 118 4 53
120 23 28 -30 0 0 12 56 4 77 180 -45 120 27 41 120 19 15 122 24 20 118 23 27
120 43 47 -31 0 0 12 55 57 78 181 -45 120 48 3 120 39 31 122 46 2 118 42 25
121 4 36 -32 0 0 12 55 50 79 183 -45 121 8 55 121 0 17 123 8 19 119 1 50
121 25 57 -33 0 0 12 55 43 80 184 -45 121 30 19 121 21 35 123 31 12 119 21 41
121 47 52 -34 0 0 12 55 36 80 186 -45 121 52 17 121 43 26 123 54 44 119 42 1
122 10 22 -35 0 0 12 55 28 81 189 -45 122 14 51 122 5 53 124 18 57 120 2 52
122 33 30 -36 0 0 12 55 21 82 192 -46 122 38 3 122 28 57 124 43 54 120 24 15
122 57 18 -37 0 0 12 55 14 83 196 -46 123 1 55 122 52 41 125 9 36 120 46 13
123 21 49 -38 0 0 12 55 7 84 202 -46 123 26 30 123 17 8 125 36 8 121 8 47
123 47 5 -39 0 0 12 55 0 84 209 -46 123 51 50 123 42 20 126 3 31 121 32 1
Uncertainty in time = +/- 11 secs
Prediction of 2010 Jun 9.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
[Top of Page][Return to Home Page]