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Updated: 2021 Jul 15, 17:23 UT
Event Rank : 99
(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 2021 Aug 02 UT, the 86 km diameter asteroid (1303) Luthera will occult a 12.3 mag star in the constellation Scorpius for observers along a path across West Australia, South Australia and New South Wales, passing over Exmouth, Port Augusta, Dubbo and Port Macquarie.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.82 mag to 15.02 mag (the magnitude of the asteroid) for at most 21.9 seconds.
This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
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.
Occultation of UCAC4 316-086871 by 1303 Luthera on 2021 Aug 2
Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 Alt
E. Longitude Latitude U.T. Alt Az Alt Crn
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
111 34 29 -19 47 59 15 15 30.3 47 251 -70 112 1 15 -19 30 35 111 7 52 -20 5 15 112 9 41 -19 25 6 110 59 33 -20 10 38 -0.86
111 48 5 -20 2 14 15 15 39.6 47 251 -70 112 14 54 -19 44 47 111 21 26 -20 19 33 112 23 21 -19 39 17 111 13 6 -20 24 57 -0.86
112 1 52 -20 16 26 15 15 48.9 47 252 -70 112 28 43 -19 58 56 111 35 9 -20 33 47 112 37 11 -19 53 24 111 26 48 -20 39 13 -0.86
112 15 48 -20 30 34 15 15 58.2 47 252 -71 112 42 42 -20 13 0 111 49 3 -20 47 58 112 51 11 -20 7 28 111 40 41 -20 53 24 -0.86
112 29 54 -20 44 38 15 16 7.4 46 252 -71 112 56 52 -20 27 1 112 3 7 -21 2 6 113 5 22 -20 21 27 111 54 44 -21 7 33 -0.86
112 44 11 -20 58 38 15 16 16.7 46 252 -71 113 11 12 -20 40 58 112 17 21 -21 16 9 113 19 43 -20 35 23 112 8 57 -21 21 37 -0.86
112 58 39 -21 12 34 15 16 26.0 46 253 -71 113 25 43 -20 54 51 112 31 45 -21 30 9 113 34 14 -20 49 15 112 23 20 -21 35 38 -0.86
113 13 17 -21 26 27 15 16 35.3 46 253 -71 113 40 24 -21 8 40 112 46 20 -21 44 5 113 48 57 -21 3 3 112 37 55 -21 49 35 -0.86
113 28 6 -21 40 15 15 16 44.6 46 253 -72 113 55 17 -21 22 24 113 1 6 -21 57 57 114 3 50 -21 16 46 112 52 40 -22 3 28 -0.86
113 43 7 -21 53 59 15 16 53.9 46 253 -72 114 10 20 -21 36 5 113 16 3 -22 11 45 114 18 55 -21 30 26 113 7 36 -22 17 17 -0.86
113 58 18 -22 7 40 15 17 3.2 45 253 -72 114 25 35 -21 49 42 113 31 11 -22 25 29 114 34 11 -21 44 1 113 22 43 -22 31 2 -0.86
114 13 41 -22 21 16 15 17 12.5 45 254 -72 114 41 2 -22 3 14 113 46 31 -22 39 9 114 49 39 -21 57 33 113 38 1 -22 44 43 -0.86
114 29 16 -22 34 48 15 17 21.7 45 254 -73 114 56 40 -22 16 42 114 2 2 -22 52 44 115 5 18 -22 10 59 113 53 32 -22 58 20 -0.86
114 45 2 -22 48 16 15 17 31.0 45 254 -73 115 12 30 -22 30 6 114 17 45 -23 6 16 115 21 9 -22 24 22 114 9 13 -23 11 53 -0.86
115 1 1 -23 1 39 15 17 40.3 45 254 -73 115 28 32 -22 43 25 114 33 40 -23 19 43 115 37 13 -22 37 40 114 25 7 -23 25 22 -0.86
115 17 12 -23 14 58 15 17 49.6 44 254 -73 115 44 47 -22 56 40 114 49 47 -23 33 6 115 53 28 -22 50 53 114 41 13 -23 38 46 -0.86
115 33 35 -23 28 12 15 17 58.9 44 254 -73 116 1 14 -23 9 50 115 6 7 -23 46 25 116 9 57 -23 4 2 114 57 32 -23 52 6 -0.86
115 50 11 -23 41 22 15 18 8.2 44 255 -74 116 17 53 -23 22 56 115 22 39 -23 59 39 116 26 38 -23 17 6 115 14 2 -24 5 21 -0.87
116 6 59 -23 54 27 15 18 17.5 44 255 -74 116 34 46 -23 35 56 115 39 24 -24 12 49 116 43 32 -23 30 6 115 30 46 -24 18 32 -0.87
116 24 1 -24 7 28 15 18 26.8 43 255 -74 116 51 52 -23 48 52 115 56 21 -24 25 53 117 0 39 -23 43 0 115 47 43 -24 31 39 -0.87
116 41 17 -24 20 23 15 18 36.0 43 255 -74 117 9 12 -24 1 43 116 13 33 -24 38 54 117 18 0 -23 55 50 116 4 53 -24 44 40 -0.87
116 58 45 -24 33 14 15 18 45.3 43 255 -74 117 26 45 -24 14 29 116 30 57 -24 51 49 117 35 35 -24 8 34 116 22 16 -24 57 37 -0.87
117 16 28 -24 46 0 15 18 54.6 43 255 -75 117 44 32 -24 27 10 116 48 36 -25 4 39 117 53 23 -24 21 14 116 39 53 -25 10 29 -0.87
117 34 25 -24 58 40 15 19 3.9 42 255 -75 118 2 33 -24 39 46 117 6 28 -25 17 25 118 11 26 -24 33 48 116 57 44 -25 23 16 -0.87
117 52 36 -25 11 16 15 19 13.2 42 255 -75 118 20 49 -24 52 16 117 24 35 -25 30 5 118 29 43 -24 46 16 117 15 50 -25 35 58 -0.87
118 11 2 -25 23 46 15 19 22.5 42 256 -75 118 39 20 -25 4 41 117 42 56 -25 42 40 118 48 15 -24 58 40 117 34 9 -25 48 34 -0.87
118 29 42 -25 36 10 15 19 31.8 42 256 -75 118 58 5 -25 17 0 118 1 32 -25 55 10 119 7 2 -25 10 57 117 52 44 -26 1 6 -0.87
118 48 38 -25 48 29 15 19 41.1 41 256 -75 119 17 6 -25 29 14 118 20 23 -26 7 34 119 26 5 -25 23 9 118 11 34 -26 13 32 -0.87
119 7 50 -26 0 43 15 19 50.3 41 256 -76 119 36 22 -25 41 22 118 39 30 -26 19 53 119 45 23 -25 35 15 118 30 38 -26 25 52 -0.87
119 27 17 -26 12 50 15 19 59.6 41 256 -76 119 55 55 -25 53 24 118 58 52 -26 32 6 120 4 57 -25 47 15 118 49 59 -26 38 7 -0.87
119 47 0 -26 24 52 15 20 8.9 41 256 -76 120 15 43 -26 5 19 119 18 30 -26 44 13 120 24 47 -25 59 9 119 9 36 -26 50 16 -0.87
120 7 0 -26 36 47 15 20 18.2 40 256 -76 120 35 49 -26 17 9 119 38 24 -26 56 15 120 44 54 -26 10 57 119 29 28 -27 2 19 -0.87
120 27 16 -26 48 36 15 20 27.5 40 256 -76 120 56 11 -26 28 52 119 58 35 -27 8 10 121 5 18 -26 22 38 119 49 38 -27 14 16 -0.87
120 47 50 -27 0 19 15 20 36.8 40 256 -76 121 16 50 -26 40 29 120 19 3 -27 19 59 121 25 59 -26 34 13 120 10 4 -27 26 6 -0.87
121 8 41 -27 11 56 15 20 46.1 40 256 -76 121 37 47 -26 51 59 120 39 48 -27 31 41 121 46 58 -26 45 41 120 30 48 -27 37 51 -0.87
121 29 49 -27 23 25 15 20 55.4 39 256 -77 121 59 2 -27 3 22 121 0 51 -27 43 17 122 8 15 -26 57 2 120 51 49 -27 49 29 -0.87
121 51 16 -27 34 48 15 21 4.6 39 256 -77 122 20 35 -27 14 38 121 22 12 -27 54 46 122 29 50 -27 8 16 121 13 8 -28 1 0 -0.87
122 13 2 -27 46 3 15 21 13.9 39 256 -77 122 42 27 -27 25 47 121 43 52 -28 6 8 122 51 44 -27 19 22 121 34 45 -28 12 24 -0.87
122 35 7 -27 57 12 15 21 23.2 38 256 -77 123 4 38 -27 36 48 122 5 50 -28 17 23 123 13 58 -27 30 21 121 56 42 -28 23 41 -0.87
122 57 31 -28 8 12 15 21 32.5 38 256 -77 123 27 9 -27 47 42 122 28 7 -28 28 31 123 36 31 -27 41 13 122 18 57 -28 34 51 -0.87
123 20 14 -28 19 6 15 21 41.8 38 256 -77 123 50 0 -27 58 27 122 50 44 -28 39 31 123 59 24 -27 51 56 122 41 32 -28 45 54 -0.87
123 43 19 -28 29 51 15 21 51.1 37 256 -77 124 13 12 -28 9 5 123 13 42 -28 50 24 124 22 38 -28 2 31 123 4 27 -28 56 48 -0.87
124 6 43 -28 40 28 15 22 0.4 37 256 -77 124 36 44 -28 19 34 123 36 59 -29 1 9 124 46 13 -28 12 58 123 27 43 -29 7 35 -0.87
124 30 30 -28 50 56 15 22 9.7 37 256 -77 125 0 39 -28 29 55 124 0 38 -29 11 45 125 10 10 -28 23 16 123 51 19 -29 18 14 -0.87
124 54 38 -29 1 16 15 22 18.9 36 256 -77 125 24 55 -28 40 7 124 24 38 -29 22 13 125 34 29 -28 33 26 124 15 17 -29 28 45 -0.87
125 19 8 -29 11 28 15 22 28.2 36 256 -77 125 49 33 -28 50 10 124 49 1 -29 32 32 125 59 10 -28 43 26 124 39 37 -29 39 6 -0.87
125 44 1 -29 21 30 15 22 37.5 36 256 -77 126 14 35 -29 0 3 125 13 46 -29 42 43 126 24 15 -28 53 16 125 4 19 -29 49 19 -0.86
126 9 18 -29 31 22 15 22 46.8 35 256 -77 126 40 1 -29 9 46 125 38 54 -29 52 44 126 49 44 -29 2 57 125 29 25 -29 59 23 -0.86
126 34 58 -29 41 5 15 22 56.1 35 256 -77 127 5 51 -29 19 20 126 4 26 -30 2 35 127 15 37 -29 12 27 125 54 54 -30 9 17 -0.86
127 1 4 -29 50 37 15 23 5.4 35 256 -77 127 32 6 -29 28 43 126 30 22 -30 12 17 127 41 55 -29 21 47 126 20 47 -30 19 2 -0.86
127 27 35 -29 59 59 15 23 14.7 34 256 -77 127 58 47 -29 37 55 126 56 43 -30 21 48 128 8 39 -29 30 57 126 47 6 -30 28 36 -0.86
127 54 31 -30 9 10 15 23 24.0 34 256 -77 128 25 54 -29 46 56 127 23 30 -30 31 9 128 35 50 -29 39 54 127 13 49 -30 38 0 -0.86
128 21 55 -30 18 10 15 23 33.2 33 256 -77 128 53 29 -29 55 46 127 50 43 -30 40 19 129 3 28 -29 48 41 127 41 0 -30 47 13 -0.86
128 49 46 -30 26 59 15 23 42.5 33 256 -77 129 21 31 -30 4 23 128 18 23 -30 49 18 129 31 34 -29 57 15 128 8 36 -30 56 15 -0.86
129 18 5 -30 35 35 15 23 51.8 33 256 -77 129 50 3 -30 12 49 128 46 31 -30 58 5 130 0 10 -30 5 36 128 36 41 -31 5 5 -0.86
129 46 54 -30 43 58 15 24 1.1 32 256 -77 130 19 4 -30 21 1 129 15 8 -31 6 39 130 29 15 -30 13 45 129 5 14 -31 13 43 -0.86
130 16 12 -30 52 9 15 24 10.4 32 256 -77 130 48 36 -30 28 59 129 44 14 -31 15 1 130 58 51 -30 21 40 129 34 17 -31 22 9 -0.86
130 46 2 -31 0 6 15 24 19.7 32 255 -77 131 18 39 -30 36 44 130 13 51 -31 23 10 131 28 59 -30 29 20 130 3 50 -31 30 21 -0.86
131 16 24 -31 7 49 15 24 29.0 31 255 -76 131 49 16 -30 44 14 130 43 59 -31 31 6 131 59 41 -30 36 46 130 33 54 -31 38 20 -0.86
131 47 19 -31 15 17 15 24 38.3 31 255 -76 132 20 26 -30 51 29 131 14 40 -31 38 47 132 30 56 -30 43 57 131 4 30 -31 46 5 -0.86
132 18 48 -31 22 30 15 24 47.5 30 255 -76 132 52 11 -30 58 28 131 45 54 -31 46 13 133 2 46 -30 50 51 131 35 40 -31 53 36 -0.86
132 50 52 -31 29 27 15 24 56.8 30 255 -76 133 24 33 -31 5 10 132 17 43 -31 53 23 133 35 14 -30 57 29 132 7 24 -32 0 50 -0.86
133 23 34 -31 36 7 15 25 6.1 29 255 -76 133 57 33 -31 11 35 132 50 7 -32 0 18 134 8 19 -31 3 49 132 39 44 -32 7 49 -0.85
133 56 54 -31 42 29 15 25 15.4 29 254 -75 134 31 11 -31 17 42 133 23 9 -32 6 55 134 42 5 -31 9 50 133 12 41 -32 14 31 -0.85
134 30 53 -31 48 33 15 25 24.7 28 254 -75 135 5 31 -31 23 29 133 56 50 -32 13 15 135 16 31 -31 15 32 133 46 16 -32 20 56 -0.85
135 5 34 -31 54 18 15 25 34.0 28 254 -75 135 40 34 -31 28 56 134 31 11 -32 19 16 135 51 41 -31 20 54 134 20 30 -32 27 2 -0.85
135 40 58 -31 59 42 15 25 43.3 27 254 -75 136 16 21 -31 34 3 135 6 13 -32 24 58 136 27 35 -31 25 54 134 55 27 -32 32 49 -0.85
136 17 7 -32 4 45 15 25 52.6 27 254 -74 136 52 54 -31 38 46 135 42 0 -32 30 19 137 4 17 -31 30 31 135 31 6 -32 38 16 -0.85
136 54 3 -32 9 25 15 26 1.8 26 253 -74 137 30 17 -31 43 6 136 18 31 -32 35 18 137 41 49 -31 34 45 136 7 31 -32 43 21 -0.85
137 31 48 -32 13 42 15 26 11.1 26 253 -74 138 8 31 -31 47 1 136 55 51 -32 39 55 138 20 12 -31 38 32 136 44 43 -32 48 3 -0.85
138 10 26 -32 17 33 15 26 20.4 25 253 -74 138 47 39 -31 50 29 137 34 0 -32 44 7 138 59 31 -31 41 53 137 22 44 -32 52 22 -0.85
138 49 58 -32 20 57 15 26 29.7 25 253 -73 139 27 44 -31 53 29 138 13 2 -32 47 54 139 39 47 -31 44 45 138 1 37 -32 56 16 -0.84
139 30 28 -32 23 52 15 26 39.0 24 252 -73 140 8 50 -31 55 58 138 53 0 -32 51 13 140 21 5 -31 47 5 138 41 25 -32 59 42 -0.84
140 11 59 -32 26 17 15 26 48.3 24 252 -72 140 51 1 -31 57 55 139 33 55 -32 54 4 141 3 29 -31 48 53 139 22 10 -33 2 41 -0.84
140 54 35 -32 28 8 15 26 57.6 23 252 -72 141 34 20 -31 59 17 140 15 53 -32 56 23 141 47 3 -31 50 5 140 3 56 -33 5 8 -0.84
141 38 21 -32 29 25 15 27 6.9 22 251 -72 142 18 53 -32 0 1 140 58 57 -32 58 9 142 31 52 -31 50 38 140 46 47 -33 7 3 -0.84
142 23 21 -32 30 3 15 27 16.1 22 251 -71 143 4 45 -32 0 4 141 43 10 -32 59 20 143 18 2 -31 50 30 141 30 48 -33 8 23 -0.84
143 9 41 -32 30 0 15 27 25.4 21 251 -71 143 52 3 -31 59 23 142 28 39 -32 59 52 144 5 39 -31 49 36 142 16 2 -33 9 5 -0.84
143 57 28 -32 29 12 15 27 34.7 21 250 -70 144 40 55 -31 57 53 143 15 29 -32 59 42 144 54 53 -31 47 51 143 2 35 -33 9 7 -0.83
144 46 50 -32 27 35 15 27 44.0 20 250 -70 145 31 29 -31 55 29 144 3 47 -32 58 46 145 45 52 -31 45 12 143 50 34 -33 8 23 -0.83
145 37 54 -32 25 3 15 27 53.3 19 250 -69 146 23 56 -31 52 5 144 53 40 -32 57 1 146 38 47 -31 41 30 144 40 6 -33 6 51 -0.83
146 30 53 -32 21 31 15 28 2.6 18 249 -69 147 18 29 -31 47 34 145 45 17 -32 54 20 147 33 53 -31 36 40 145 31 21 -33 4 26 -0.83
147 25 59 -32 16 51 15 28 11.9 18 249 -68 148 15 24 -31 41 48 146 38 50 -32 50 38 148 31 26 -31 30 31 146 24 27 -33 1 1 -0.83
148 23 29 -32 10 54 15 28 21.2 17 248 -68 149 15 1 -31 34 35 147 34 32 -32 45 48 149 31 48 -31 22 51 147 19 38 -32 56 29 -0.83
149 23 42 -32 3 30 15 28 30.4 16 248 -67 150 17 46 -31 25 41 148 32 39 -32 39 40 150 35 27 -31 13 25 148 17 10 -32 50 43 -0.83
150 27 5 -31 54 23 15 28 39.7 15 247 -66 151 24 13 -31 14 47 149 33 32 -32 32 3 151 43 1 -31 1 53 149 17 21 -32 43 31 -0.82
151 34 14 -31 43 16 15 28 49.0 14 247 -65 152 35 10 -31 1 28 150 37 37 -32 22 42 152 55 23 -30 47 46 150 20 37 -32 34 39 -0.82
152 45 54 -31 29 41 15 28 58.3 13 246 -65 153 51 45 -30 45 7 151 45 31 -32 11 17 154 13 48 -30 30 23 151 27 29 -32 23 51 -0.82
154 3 17 -31 13 1 15 29 7.6 12 246 -64 155 15 42 -30 24 47 152 58 1 -31 57 23 155 40 20 -30 8 38 152 38 42 -32 10 41 -0.83
155 28 9 -30 52 19 15 29 16.9 11 245 -63 156 50 0 -29 58 54 154 16 19 -31 40 21 157 18 33 -29 40 36 153 55 19 -31 54 36 -0.83
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