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Updated: 2021 Oct 21, 17:06 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 Dec 07 UT, the 41 km diameter asteroid (1298) Nocturna will occult a 9.1 mag star in the constellation Taurus for observers along a path across southern Queensland and northern South Australia, passing over Harvey Bay.
In the case of an occultation, the combined light of the asteroid and the star will drop by 6.4 mag to 15.42 mag (the magnitude of the asteroid) for at most 3.2 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 TYC 1874-00353-1 by 1298 Nocturna on 2021 Dec 7
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
154 50 22 -24 31 0 13 56 15.9 37 7 -43 154 50 36 -24 49 8 154 50 8 -24 13 0 154 50 40 -24 55 18 154 50 2 -24 6 56 1.24
154 30 49 -24 35 22 13 56 18.3 37 8 -43 154 31 0 -24 53 32 154 30 38 -24 17 20 154 31 3 -24 59 43 154 30 33 -24 11 16 1.24
154 11 14 -24 39 49 13 56 20.8 37 8 -42 154 11 22 -24 58 1 154 11 5 -24 21 46 154 11 24 -25 4 12 154 11 2 -24 15 40 1.24
153 51 36 -24 44 21 13 56 23.3 37 8 -42 153 51 41 -25 2 35 153 51 31 -24 26 16 153 51 42 -25 8 47 153 51 28 -24 20 10 1.24
153 31 56 -24 48 58 13 56 25.8 37 9 -42 153 31 57 -25 7 14 153 31 53 -24 30 51 153 31 57 -25 13 26 153 31 52 -24 24 44 1.24
153 12 13 -24 53 41 13 56 28.2 36 9 -42 153 12 11 -25 11 58 153 12 13 -24 35 31 153 12 10 -25 18 11 153 12 13 -24 29 24 1.24
152 52 27 -24 58 28 13 56 30.7 36 9 -42 152 52 22 -25 16 47 152 52 31 -24 40 16 152 52 20 -25 23 1 152 52 31 -24 34 8 1.24
152 32 38 -25 3 20 13 56 33.2 36 10 -42 152 32 30 -25 21 42 152 32 45 -24 45 7 152 32 27 -25 27 57 152 32 47 -24 38 58 1.24
152 12 47 -25 8 18 13 56 35.7 36 10 -42 152 12 35 -25 26 42 152 12 57 -24 50 3 152 12 31 -25 32 58 152 13 0 -24 43 53 1.24
151 52 52 -25 13 21 13 56 38.2 36 10 -42 151 52 37 -25 31 47 151 53 5 -24 55 4 151 52 31 -25 38 4 151 53 9 -24 48 53 1.24
151 32 54 -25 18 30 13 56 40.6 36 11 -42 151 32 35 -25 36 58 151 33 10 -25 0 10 151 32 29 -25 43 16 151 33 16 -24 53 59 1.24
151 12 52 -25 23 44 13 56 43.1 36 11 -42 151 12 30 -25 42 15 151 13 12 -25 5 22 151 12 22 -25 48 33 151 13 19 -24 59 10 1.24
150 52 48 -25 29 4 13 56 45.6 35 11 -42 150 52 22 -25 47 37 150 53 11 -25 10 39 150 52 13 -25 53 56 150 53 19 -25 4 26 1.24
150 32 39 -25 34 29 13 56 48.1 35 12 -42 150 32 10 -25 53 5 150 33 6 -25 16 2 150 32 0 -25 59 25 150 33 15 -25 9 48 1.24
150 12 27 -25 40 0 13 56 50.6 35 12 -42 150 11 54 -25 58 39 150 12 58 -25 21 30 150 11 43 -26 4 59 150 13 8 -25 15 16 1.24
149 52 11 -25 45 37 13 56 53.0 35 12 -42 149 51 35 -26 4 18 149 52 46 -25 27 4 149 51 22 -26 10 40 149 52 57 -25 20 49 1.24
149 31 52 -25 51 19 13 56 55.5 35 13 -42 149 31 11 -26 10 3 149 32 30 -25 32 44 149 30 57 -26 16 26 149 32 42 -25 26 28 1.24
149 11 28 -25 57 8 13 56 58.0 35 13 -41 149 10 44 -26 15 55 149 12 10 -25 38 30 149 10 28 -26 22 18 149 12 24 -25 32 13 1.24
148 51 0 -26 3 2 13 57 0.5 35 13 -41 148 50 12 -26 21 52 148 51 46 -25 44 21 148 49 55 -26 28 17 148 52 1 -25 38 3 1.24
148 30 28 -26 9 3 13 57 3.0 34 14 -41 148 29 35 -26 27 56 148 31 18 -25 50 19 148 29 17 -26 34 21 148 31 34 -25 44 0 1.24
148 9 51 -26 15 10 13 57 5.4 34 14 -41 148 8 54 -26 34 6 148 10 45 -25 56 23 148 8 34 -26 40 32 148 11 3 -25 50 3 1.25
147 49 10 -26 21 23 13 57 7.9 34 14 -41 147 48 9 -26 40 22 147 50 8 -26 2 32 147 47 47 -26 46 50 147 50 27 -25 56 12 1.25
147 28 24 -26 27 42 13 57 10.4 34 15 -41 147 27 18 -26 46 45 147 29 26 -26 8 49 147 26 55 -26 53 14 147 29 47 -26 2 27 1.25
147 7 33 -26 34 8 13 57 12.9 34 15 -41 147 6 23 -26 53 14 147 8 40 -26 15 11 147 5 58 -26 59 44 147 9 2 -26 8 48 1.25
146 46 37 -26 40 40 13 57 15.4 33 15 -41 146 45 22 -26 59 50 146 47 48 -26 21 40 146 44 56 -27 6 21 146 48 11 -26 15 16 1.25
146 25 35 -26 47 20 13 57 17.8 33 16 -41 146 24 16 -27 6 33 146 26 51 -26 28 16 146 23 48 -27 13 5 146 27 16 -26 21 51 1.25
146 4 28 -26 54 6 13 57 20.3 33 16 -40 146 3 4 -27 13 22 146 5 49 -26 34 58 146 2 35 -27 19 57 146 6 15 -26 28 32 1.25
145 43 16 -27 0 58 13 57 22.8 33 16 -40 145 41 47 -27 20 19 145 44 41 -26 41 47 145 41 16 -27 26 55 145 45 9 -26 35 20 1.25
145 21 57 -27 7 58 13 57 25.3 33 17 -40 145 20 23 -27 27 23 145 23 28 -26 48 43 145 19 50 -27 34 0 145 23 58 -26 42 14 1.25
145 0 33 -27 15 6 13 57 27.7 33 17 -40 144 58 54 -27 34 35 145 2 9 -26 55 47 144 58 19 -27 41 13 145 2 40 -26 49 16 1.25
144 39 3 -27 22 20 13 57 30.2 32 17 -40 144 37 18 -27 41 53 144 40 43 -27 2 57 144 36 41 -27 48 33 144 41 16 -26 56 25 1.25
144 17 26 -27 29 42 13 57 32.7 32 18 -40 144 15 35 -27 49 20 144 19 12 -27 10 15 144 14 57 -27 56 1 144 19 46 -27 3 42 1.25
143 55 42 -27 37 12 13 57 35.2 32 18 -40 143 53 46 -27 56 54 143 57 33 -27 17 40 143 53 6 -28 3 37 143 58 10 -27 11 5 1.25
143 33 51 -27 44 49 13 57 37.7 32 18 -39 143 31 50 -28 4 36 143 35 48 -27 25 13 143 31 7 -28 11 20 143 36 27 -27 18 37 1.25
143 11 54 -27 52 35 13 57 40.1 31 19 -39 143 9 46 -28 12 26 143 13 57 -27 32 54 143 9 1 -28 19 12 143 14 37 -27 26 16 1.25
142 49 48 -28 0 28 13 57 42.6 31 19 -39 142 47 35 -28 20 25 142 51 57 -27 40 42 142 46 48 -28 27 12 142 52 40 -27 34 3 1.25
142 27 36 -28 8 30 13 57 45.1 31 19 -39 142 25 15 -28 28 32 142 29 51 -27 48 39 142 24 27 -28 35 21 142 30 35 -27 41 58 1.25
142 5 15 -28 16 40 13 57 47.6 31 20 -39 142 2 48 -28 36 47 142 7 36 -27 56 44 142 1 57 -28 43 39 142 8 23 -27 50 2 1.25
141 42 46 -28 24 59 13 57 50.1 31 20 -39 141 40 13 -28 45 12 141 45 14 -28 4 58 141 39 19 -28 52 5 141 46 3 -27 58 14 1.25
141 20 9 -28 33 27 13 57 52.5 30 20 -38 141 17 28 -28 53 45 141 22 43 -28 13 20 141 16 32 -29 0 40 141 23 34 -28 6 34 1.25
140 57 22 -28 42 4 13 57 55.0 30 21 -38 140 54 35 -29 2 28 141 0 4 -28 21 52 140 53 36 -29 9 25 141 0 57 -28 15 4 1.25
140 34 27 -28 50 50 13 57 57.5 30 21 -38 140 31 32 -29 11 21 140 37 16 -28 30 32 140 30 31 -29 18 20 140 38 12 -28 23 42 1.25
140 11 22 -28 59 46 13 58 0.0 30 21 -38 140 8 19 -29 20 23 140 14 18 -28 39 22 140 7 15 -29 27 24 140 15 16 -28 32 30 1.25
139 48 7 -29 8 52 13 58 2.5 29 21 -38 139 44 56 -29 29 35 139 51 11 -28 48 22 139 43 50 -29 36 39 139 52 12 -28 41 28 1.25
139 24 42 -29 18 8 13 58 4.9 29 22 -37 139 21 22 -29 38 58 139 27 54 -28 57 31 139 20 13 -29 46 4 139 28 57 -28 50 35 1.25
139 1 6 -29 27 34 13 58 7.4 29 22 -37 138 57 38 -29 48 31 139 4 26 -29 6 51 138 56 26 -29 55 40 139 5 32 -28 59 52 1.25
138 37 19 -29 37 12 13 58 9.9 28 22 -37 138 33 42 -29 58 16 138 40 48 -29 16 21 138 32 27 -30 5 27 138 41 57 -29 9 20 1.25
138 13 20 -29 47 0 13 58 12.4 28 23 -37 138 9 34 -30 8 12 138 16 58 -29 26 1 138 8 16 -30 15 25 138 18 10 -29 18 58 1.25
137 49 9 -29 56 59 13 58 14.8 28 23 -37 137 45 14 -30 18 19 137 52 56 -29 35 53 137 43 52 -30 25 36 137 54 11 -29 28 48 1.25
137 24 46 -30 7 10 13 58 17.3 28 23 -36 137 20 40 -30 28 38 137 28 43 -29 45 57 137 19 15 -30 35 58 137 30 1 -29 38 48 1.25
137 0 9 -30 17 34 13 58 19.8 27 24 -36 136 55 53 -30 39 10 137 4 16 -29 56 12 136 54 24 -30 46 33 137 5 38 -29 49 1 1.25
136 35 19 -30 28 10 13 58 22.3 27 24 -36 136 30 52 -30 49 55 136 39 36 -30 6 39 136 29 19 -30 57 21 136 41 1 -29 59 25 1.25
136 10 14 -30 38 59 13 58 24.8 27 24 -36 136 5 36 -31 0 53 136 14 43 -30 17 19 136 3 59 -31 8 22 136 16 11 -30 10 2 1.25
135 44 55 -30 50 1 13 58 27.2 26 25 -35 135 40 5 -31 12 6 135 49 34 -30 28 12 135 38 24 -31 19 38 135 51 7 -30 20 52 1.25
135 19 19 -31 1 17 13 58 29.7 26 25 -35 135 14 17 -31 23 32 135 24 11 -30 39 19 135 12 32 -31 31 8 135 25 47 -30 31 56 1.26
134 53 28 -31 12 48 13 58 32.2 26 25 -35 134 48 12 -31 35 13 134 58 31 -30 50 39 134 46 22 -31 42 53 135 0 12 -30 43 13 1.26
134 27 18 -31 24 34 13 58 34.7 25 26 -34 134 21 49 -31 47 10 134 32 35 -31 2 14 134 19 55 -31 54 54 134 34 20 -30 54 44 1.26
134 0 51 -31 36 35 13 58 37.2 25 26 -34 133 55 7 -31 59 23 134 6 22 -31 14 4 133 53 8 -32 7 11 134 8 11 -31 6 31 1.26
133 34 5 -31 48 53 13 58 39.6 25 26 -34 133 28 6 -32 11 53 133 39 50 -31 26 10 133 26 1 -32 19 45 133 41 44 -31 18 33 1.26
133 6 58 -32 1 27 13 58 42.1 24 27 -34 133 0 43 -32 24 41 133 12 58 -31 38 33 132 58 33 -32 32 37 133 14 57 -31 30 51 1.26
132 39 30 -32 14 20 13 58 44.6 24 27 -33 132 32 59 -32 37 47 132 45 47 -31 51 12 132 30 42 -32 45 48 132 47 51 -31 43 27 1.26
132 11 40 -32 27 31 13 58 47.1 24 27 -33 132 4 51 -32 51 12 132 18 13 -32 4 10 132 2 28 -32 59 19 132 20 23 -31 56 20 1.26
131 43 26 -32 41 2 13 58 49.6 23 28 -33 131 36 18 -33 4 58 131 50 17 -32 17 26 131 33 49 -33 13 10 131 52 33 -32 9 31 1.26
131 14 47 -32 54 53 13 58 52.0 23 28 -32 131 7 19 -33 19 6 131 21 57 -32 31 2 131 4 43 -33 27 23 131 24 19 -32 23 2 1.26
130 45 41 -33 9 6 13 58 54.5 22 29 -32 130 37 52 -33 33 35 130 53 12 -32 44 59 130 35 8 -33 41 59 130 55 40 -32 36 54 1.26
130 16 7 -33 23 41 13 58 57.0 22 29 -32 130 7 55 -33 48 29 130 23 59 -32 59 17 130 5 3 -33 56 59 130 26 34 -32 51 7 1.26
129 46 3 -33 38 41 13 58 59.5 22 29 -31 129 37 26 -34 3 48 129 54 17 -33 13 59 129 34 26 -34 12 25 129 57 0 -33 5 42 1.26
129 15 26 -33 54 6 13 59 2.0 21 30 -31 129 6 23 -34 19 34 129 24 5 -33 29 5 129 3 14 -34 28 18 129 26 56 -33 20 42 1.26
128 44 15 -34 9 59 13 59 4.4 21 30 -30 128 34 44 -34 35 49 128 53 20 -33 44 37 128 31 25 -34 44 40 128 56 19 -33 36 7 1.26
128 12 26 -34 26 20 13 59 6.9 20 30 -30 128 2 25 -34 52 34 128 21 59 -34 0 36 127 58 55 -35 1 34 128 25 7 -33 51 59 1.26
127 39 57 -34 43 12 13 59 9.4 20 31 -30 127 29 23 -35 9 52 127 50 1 -34 17 4 127 25 42 -35 19 1 127 53 19 -34 8 20 1.26
127 6 45 -35 0 38 13 59 11.9 19 31 -29 126 55 36 -35 27 45 127 17 21 -34 34 5 126 51 41 -35 37 4 127 20 50 -34 25 12 1.26
126 32 45 -35 18 40 13 59 14.3 19 32 -29 126 20 57 -35 46 17 126 43 58 -34 51 38 126 16 49 -35 55 46 126 47 38 -34 42 37 1.26
125 57 54 -35 37 20 13 59 16.8 18 32 -28 125 45 24 -36 5 30 126 9 46 -35 9 48 125 41 0 -36 15 11 126 13 39 -35 0 37 1.27
125 22 7 -35 56 43 13 59 19.3 18 32 -28 125 8 50 -36 25 28 125 34 42 -35 28 38 125 4 9 -36 35 23 125 38 48 -35 19 16 1.27
124 45 18 -36 16 51 13 59 21.8 17 33 -27 124 31 8 -36 46 17 124 58 40 -35 48 11 124 26 9 -36 56 25 125 3 2 -35 38 37 1.27
124 7 20 -36 37 51 13 59 24.3 17 33 -27 123 52 12 -37 8 0 124 21 35 -36 8 30 123 46 52 -37 18 24 124 26 13 -35 58 44 1.27
123 28 5 -36 59 46 13 59 26.7 16 34 -26 123 11 53 -37 30 45 123 43 19 -36 29 41 123 6 9 -37 41 27 123 48 16 -36 19 41 1.27
122 47 24 -37 22 45 13 59 29.2 16 34 -26 122 29 58 -37 54 38 123 3 45 -36 51 49 122 23 47 -38 5 41 123 9 3 -36 41 33 1.27
122 5 6 -37 46 53 13 59 31.7 15 35 -25 121 46 14 -38 19 50 122 22 42 -37 15 2 121 39 32 -38 31 16 122 28 24 -37 4 28 1.27
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