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Updated: 2023 Feb 15, 20:57 UT
Event Rank : 66
(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 2023 Apr 07 UT, the 42 km diameter asteroid (829) Academia will occult a 10.9 mag star in the constellation Scorpius for observers along a somewhat uncertain path across Northern Territory and South Australia, passing over Katherine, Tennant Creek, near Darwin, Port Lincoln and Kangaroo Island.
In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 15.98 mag (the magnitude of the asteroid) for at most 7.3 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 7366-00317-1 by 829 Academia on 2023 Apr 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
129 58 25 - 9 52 47 15 10 19.9 25 122 -86 129 36 32 - 9 47 33 130 20 4 - 9 57 50 128 56 15 - 9 37 35 130 58 38 -10 6 33 1.09
130 12 34 -10 20 40 15 10 26.2 26 122 -86 129 50 54 -10 15 37 130 34 0 -10 25 34 129 11 3 -10 5 59 131 12 14 -10 33 59 1.09
130 26 15 -10 48 14 15 10 32.6 26 122 -85 130 4 47 -10 43 20 130 47 30 -10 52 58 129 25 19 -10 34 1 131 25 23 -11 1 7 1.09
130 39 29 -11 15 29 15 10 38.9 27 121 -85 130 18 12 -11 10 44 131 0 32 -11 20 4 129 39 6 -11 1 43 131 38 8 -11 27 58 1.09
130 52 17 -11 42 26 15 10 45.2 27 121 -85 130 31 10 -11 37 50 131 13 11 -11 46 53 129 52 25 -11 29 5 131 50 29 -11 54 33 1.09
131 4 40 -12 9 6 15 10 51.5 27 121 -84 130 43 44 -12 4 38 131 25 25 -12 13 25 130 5 17 -11 56 9 132 2 28 -12 20 51 1.09
131 16 41 -12 35 30 15 10 57.8 28 121 -84 130 55 53 -12 31 10 131 37 17 -12 39 42 130 17 44 -12 22 56 132 14 5 -12 46 55 1.09
131 28 19 -13 1 39 15 11 4.1 28 121 -84 131 7 40 -12 57 26 131 48 47 -13 5 43 130 29 48 -12 49 26 132 25 22 -13 12 45 1.09
131 39 37 -13 27 33 15 11 10.4 29 120 -83 131 19 5 -13 23 27 131 59 57 -13 31 31 130 41 28 -13 15 40 132 36 19 -13 38 20 1.09
131 50 34 -13 53 14 15 11 16.8 29 120 -83 131 30 10 -13 49 14 132 10 47 -13 57 5 130 52 47 -13 41 40 132 46 57 -14 3 43 1.09
132 1 11 -14 18 41 15 11 23.1 29 120 -83 131 40 54 -14 14 48 132 21 18 -14 22 26 131 3 44 -14 7 25 132 57 17 -14 28 54 1.09
132 11 30 -14 43 55 15 11 29.4 30 120 -82 131 51 20 -14 40 8 132 31 31 -14 47 34 131 14 22 -14 32 57 133 7 20 -14 53 52 1.09
132 21 31 -15 8 57 15 11 35.7 30 120 -82 132 1 27 -15 5 16 132 41 27 -15 12 31 131 24 41 -14 58 16 133 17 6 -15 18 39 1.08
132 31 15 -15 33 48 15 11 42.0 31 119 -81 132 11 16 -15 30 12 132 51 5 -15 37 16 131 34 41 -15 23 22 133 26 35 -15 43 15 1.08
132 40 43 -15 58 27 15 11 48.3 31 119 -81 132 20 49 -15 54 57 133 0 27 -16 1 50 131 44 23 -15 48 17 133 35 49 -16 7 40 1.08
132 49 54 -16 22 56 15 11 54.6 31 119 -81 132 30 4 -16 19 30 133 9 34 -16 26 14 131 53 49 -16 13 0 133 44 48 -16 31 56 1.08
132 58 49 -16 47 14 15 12 1.0 32 119 -80 132 39 5 -16 43 53 133 18 25 -16 50 28 132 2 57 -16 37 32 133 53 32 -16 56 1 1.08
133 7 30 -17 11 22 15 12 7.3 32 119 -80 132 47 49 -17 8 6 133 27 2 -17 14 31 132 11 50 -17 1 54 134 2 2 -17 19 57 1.08
133 15 56 -17 35 21 15 12 13.6 32 118 -79 132 56 19 -17 32 10 133 35 24 -17 38 26 132 20 28 -17 26 6 134 10 18 -17 43 44 1.08
133 24 8 -17 59 11 15 12 19.9 33 118 -79 133 4 35 -17 56 3 133 43 33 -18 2 11 132 28 50 -17 50 7 134 18 20 -18 7 22 1.08
133 32 6 -18 22 51 15 12 26.2 33 118 -78 133 12 36 -18 19 48 133 51 28 -18 25 48 132 36 58 -18 14 0 134 26 10 -18 30 52 1.08
133 39 51 -18 46 24 15 12 32.5 33 118 -78 133 20 24 -18 43 24 133 59 10 -18 49 16 132 44 52 -18 37 43 134 33 47 -18 54 14 1.08
133 47 23 -19 9 47 15 12 38.8 34 117 -78 133 27 59 -19 6 52 134 6 39 -19 12 37 132 52 32 -19 1 18 134 41 12 -19 17 28 1.08
133 54 42 -19 33 3 15 12 45.2 34 117 -77 133 35 20 -19 30 11 134 13 56 -19 35 49 132 59 59 -19 24 44 134 48 25 -19 40 34 1.08
134 1 49 -19 56 12 15 12 51.5 34 117 -77 133 42 30 -19 53 23 134 21 0 -19 58 54 133 7 12 -19 48 3 134 55 26 -20 3 33 1.08
134 8 44 -20 19 12 15 12 57.8 34 117 -76 133 49 27 -20 16 27 134 27 53 -20 21 51 133 14 14 -20 11 13 135 2 16 -20 26 25 1.07
134 15 27 -20 42 6 15 13 4.1 35 117 -76 133 56 12 -20 39 24 134 34 35 -20 44 42 133 21 3 -20 34 16 135 8 54 -20 49 10 1.07
134 21 59 -21 4 53 15 13 10.4 35 116 -76 134 2 46 -21 2 14 134 41 5 -21 7 25 133 27 40 -20 57 12 135 15 22 -21 11 48 1.07
134 28 20 -21 27 33 15 13 16.7 35 116 -75 134 9 8 -21 24 57 134 47 24 -21 30 2 133 34 5 -21 20 0 135 21 39 -21 34 20 1.07
134 34 29 -21 50 6 15 13 23.0 36 116 -75 134 15 19 -21 47 33 134 53 33 -21 52 33 133 40 18 -21 42 42 135 27 45 -21 56 45 1.07
134 40 28 -22 12 33 15 13 29.4 36 116 -75 134 21 19 -22 10 3 134 59 31 -22 14 57 133 46 21 -22 5 17 135 33 42 -22 19 5 1.07
134 46 17 -22 34 54 15 13 35.7 36 115 -74 134 27 8 -22 32 27 135 5 19 -22 37 16 133 52 12 -22 27 46 135 39 28 -22 41 18 1.07
134 51 55 -22 57 9 15 13 42.0 36 115 -74 134 32 47 -22 54 44 135 10 56 -22 59 28 133 57 53 -22 50 9 135 45 4 -23 3 26 1.07
134 57 23 -23 19 18 15 13 48.3 37 115 -73 134 38 16 -23 16 56 135 16 24 -23 21 35 134 3 23 -23 12 25 135 50 31 -23 25 29 1.07
135 2 41 -23 41 22 15 13 54.6 37 115 -73 134 43 35 -23 39 2 135 21 41 -23 43 36 134 8 43 -23 34 36 135 55 48 -23 47 26 1.07
135 7 50 -24 3 20 15 14 0.9 37 114 -73 134 48 43 -24 1 3 135 26 49 -24 5 32 134 13 52 -23 56 41 136 0 56 -24 9 18 1.07
135 12 48 -24 25 13 15 14 7.2 37 114 -72 134 53 42 -24 22 58 135 31 48 -24 27 23 134 18 51 -24 18 40 136 5 55 -24 31 5 1.07
135 17 37 -24 47 1 15 14 13.6 38 114 -72 134 58 31 -24 44 48 135 36 37 -24 49 9 134 23 41 -24 40 35 136 10 45 -24 52 47 1.07
135 22 17 -25 8 44 15 14 19.9 38 113 -71 135 3 11 -25 6 34 135 41 17 -25 10 50 134 28 20 -25 2 24 136 15 25 -25 14 24 1.06
135 26 48 -25 30 23 15 14 26.2 38 113 -71 135 7 42 -25 28 14 135 45 48 -25 32 26 134 32 51 -25 24 8 136 19 57 -25 35 57 1.06
135 31 10 -25 51 56 15 14 32.5 38 113 -71 135 12 3 -25 49 50 135 50 11 -25 53 58 134 37 12 -25 45 47 136 24 20 -25 57 25 1.06
135 35 23 -26 13 25 15 14 38.8 38 113 -70 135 16 15 -26 11 21 135 54 24 -26 15 25 134 41 23 -26 7 22 136 28 35 -26 18 49 1.06
135 39 27 -26 34 50 15 14 45.1 39 112 -70 135 20 19 -26 32 47 135 58 29 -26 36 48 134 45 25 -26 28 52 136 32 41 -26 40 9 1.06
135 43 22 -26 56 11 15 14 51.4 39 112 -70 135 24 13 -26 54 10 136 2 25 -26 58 7 134 49 19 -26 50 18 136 36 39 -27 1 24 1.06
135 47 9 -27 17 27 15 14 57.8 39 112 -69 135 27 59 -27 15 28 136 6 13 -27 19 21 134 53 3 -27 11 39 136 40 28 -27 22 36 1.06
135 50 47 -27 38 39 15 15 4.1 39 111 -69 135 31 36 -27 36 42 136 9 52 -27 40 32 134 56 38 -27 32 56 136 44 9 -27 43 44 1.06
135 54 16 -27 59 48 15 15 10.4 39 111 -69 135 35 4 -27 57 52 136 13 23 -28 1 39 135 0 4 -27 54 9 136 47 43 -28 4 48 1.06
135 57 38 -28 20 53 15 15 16.7 40 111 -68 135 38 24 -28 18 58 136 16 45 -28 22 42 135 3 22 -28 15 19 136 51 8 -28 25 48 1.06
136 0 51 -28 41 54 15 15 23.0 40 111 -68 135 41 36 -28 40 1 136 20 0 -28 43 42 135 6 31 -28 36 24 136 54 25 -28 46 45 1.06
136 3 55 -29 2 51 15 15 29.3 40 110 -68 135 44 39 -29 1 0 136 23 6 -29 4 38 135 9 32 -28 57 25 136 57 34 -29 7 39 1.05
136 6 52 -29 23 45 15 15 35.6 40 110 -67 135 47 34 -29 21 55 136 26 4 -29 25 30 135 12 24 -29 18 23 137 0 35 -29 28 29 1.05
136 9 40 -29 44 35 15 15 42.0 40 110 -67 135 50 20 -29 42 47 136 28 54 -29 46 19 135 15 7 -29 39 18 137 3 29 -29 49 16 1.05
136 12 20 -30 5 23 15 15 48.3 41 109 -66 135 52 59 -30 3 35 136 31 36 -30 7 5 135 17 42 -30 0 9 137 6 15 -30 9 59 1.05
136 14 52 -30 26 7 15 15 54.6 41 109 -66 135 55 29 -30 24 21 136 34 10 -30 27 48 135 20 9 -30 20 56 137 8 52 -30 30 40 1.05
136 17 17 -30 46 48 15 16 0.9 41 109 -66 135 57 51 -30 45 3 136 36 37 -30 48 28 135 22 27 -30 41 41 137 11 23 -30 51 18 1.05
136 19 33 -31 7 26 15 16 7.2 41 109 -65 136 0 5 -31 5 42 136 38 55 -31 9 5 135 24 37 -31 2 22 137 13 45 -31 11 52 1.05
136 21 41 -31 28 1 15 16 13.5 41 108 -65 136 2 11 -31 26 18 136 41 6 -31 29 39 135 26 38 -31 23 0 137 16 0 -31 32 24 1.05
136 23 41 -31 48 33 15 16 19.8 41 108 -65 136 4 8 -31 46 51 136 43 9 -31 50 10 135 28 32 -31 43 35 137 18 8 -31 52 54 1.05
136 25 34 -32 9 2 15 16 26.2 42 108 -64 136 5 58 -32 7 22 136 45 3 -32 10 38 135 30 17 -32 4 8 137 20 7 -32 13 20 1.05
136 27 18 -32 29 29 15 16 32.5 42 107 -64 136 7 40 -32 27 49 136 46 51 -32 31 4 135 31 54 -32 24 37 137 21 59 -32 33 44 1.05
136 28 54 -32 49 53 15 16 38.8 42 107 -64 136 9 14 -32 48 15 136 48 30 -32 51 27 135 33 23 -32 45 4 137 23 44 -32 54 6 1.05
136 30 23 -33 10 15 15 16 45.1 42 107 -63 136 10 39 -33 8 37 136 50 2 -33 11 48 135 34 43 -33 5 28 137 25 21 -33 14 25 1.04
136 31 44 -33 30 34 15 16 51.4 42 106 -63 136 11 57 -33 28 57 136 51 25 -33 32 6 135 35 56 -33 25 50 137 26 50 -33 34 41 1.04
136 32 57 -33 50 50 15 16 57.7 42 106 -63 136 13 7 -33 49 14 136 52 41 -33 52 22 135 37 0 -33 46 9 137 28 12 -33 54 56 1.04
136 34 2 -34 11 5 15 17 4.0 42 106 -62 136 14 9 -34 9 30 136 53 50 -34 12 35 135 37 56 -34 6 25 137 29 26 -34 15 8 1.04
136 34 59 -34 31 17 15 17 10.4 42 105 -62 136 15 2 -34 29 43 136 54 50 -34 32 47 135 38 43 -34 26 40 137 30 32 -34 35 18 1.04
136 35 48 -34 51 27 15 17 16.7 43 105 -62 136 15 48 -34 49 53 136 55 43 -34 52 56 135 39 23 -34 46 52 137 31 31 -34 55 26 1.04
136 36 29 -35 11 35 15 17 23.0 43 105 -61 136 16 26 -35 10 2 136 56 27 -35 13 3 135 39 54 -35 7 1 137 32 23 -35 15 32 1.04
136 37 2 -35 31 40 15 17 29.3 43 105 -61 136 16 55 -35 30 8 136 57 4 -35 33 8 135 40 17 -35 27 9 137 33 6 -35 35 36 1.04
136 37 27 -35 51 44 15 17 35.6 43 104 -61 136 17 16 -35 50 12 136 57 33 -35 53 11 135 40 31 -35 47 14 137 33 42 -35 55 38 1.04
136 37 45 -36 11 46 15 17 41.9 43 104 -60 136 17 30 -36 10 15 136 57 54 -36 13 13 135 40 37 -36 7 18 137 34 10 -36 15 38 1.04
136 37 54 -36 31 46 15 17 48.2 43 104 -60 136 17 35 -36 30 15 136 58 7 -36 33 12 135 40 35 -36 27 19 137 34 31 -36 35 36 1.04
136 37 54 -36 51 44 15 17 54.6 43 103 -60 136 17 31 -36 50 14 136 58 12 -36 53 9 135 40 24 -36 47 18 137 34 43 -36 55 33 1.04
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