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Updated: 2020 Dec 31, 00:59 UT
Event Rank : 97
(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 Feb 02 UT, the 84 km diameter asteroid (583) Klotilde will occult a 12.5 mag star in the constellation Corvus for observers along a path across western Queensland and eastern South Australia, passing over Cloncurry, Birdsville, Port Augusta and Kangaroo Island.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.62 mag to 13.83 mag (the magnitude of the asteroid) for at most 21.4 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, 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 UCAC4-379-062590 by 583 Klotilde on 2021 Feb 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
141 38 33 -10 12 19 16 26 7.3 66 103 -54 142 3 42 -10 12 23 141 13 18 -10 12 12 142 23 16 -10 12 25 140 53 34 -10 12 4 -0.45
141 36 49 -10 34 4 16 26 17.4 66 102 -53 142 2 0 -10 34 8 141 11 32 -10 33 56 142 21 34 -10 34 9 140 51 47 -10 33 48 -0.45
141 35 1 -10 55 48 16 26 27.6 66 101 -53 142 0 14 -10 55 52 141 9 43 -10 55 40 142 19 50 -10 55 53 140 49 57 -10 55 33 -0.45
141 33 10 -11 17 31 16 26 37.7 66 100 -53 141 58 24 -11 17 35 141 7 50 -11 17 24 142 18 1 -11 17 36 140 48 3 -11 17 16 -0.45
141 31 15 -11 39 13 16 26 47.9 66 99 -53 141 56 31 -11 39 17 141 5 54 -11 39 6 142 16 10 -11 39 19 140 46 5 -11 38 58 -0.45
141 29 16 -12 0 55 16 26 58.0 66 99 -52 141 54 35 -12 0 59 141 3 53 -12 0 48 142 14 15 -12 1 0 140 44 3 -12 0 40 -0.45
141 27 14 -12 22 36 16 27 8.2 66 98 -52 141 52 35 -12 22 40 141 1 49 -12 22 29 142 12 16 -12 22 42 140 41 57 -12 22 22 -0.44
141 25 9 -12 44 17 16 27 18.3 66 97 -52 141 50 31 -12 44 21 140 59 42 -12 44 10 142 10 14 -12 44 22 140 39 48 -12 44 3 -0.44
141 22 59 -13 5 57 16 27 28.5 66 96 -52 141 48 24 -13 6 1 140 57 30 -13 5 50 142 8 9 -13 6 2 140 37 35 -13 5 43 -0.44
141 20 47 -13 27 37 16 27 38.6 66 95 -51 141 46 13 -13 27 41 140 55 15 -13 27 30 142 6 0 -13 27 42 140 35 18 -13 27 23 -0.44
141 18 30 -13 49 17 16 27 48.8 66 95 -51 141 43 59 -13 49 21 140 52 56 -13 49 10 142 3 47 -13 49 22 140 32 58 -13 49 2 -0.44
141 16 10 -14 10 56 16 27 58.9 66 94 -51 141 41 41 -14 11 0 140 50 34 -14 10 49 142 1 31 -14 11 1 140 30 33 -14 10 41 -0.44
141 13 46 -14 32 35 16 28 9.1 66 93 -50 141 39 20 -14 32 38 140 48 7 -14 32 28 141 59 11 -14 32 39 140 28 5 -14 32 20 -0.44
141 11 18 -14 54 13 16 28 19.2 66 92 -50 141 36 54 -14 54 17 140 45 37 -14 54 6 141 56 48 -14 54 18 140 25 33 -14 53 59 -0.44
141 8 47 -15 15 52 16 28 29.4 66 91 -50 141 34 26 -15 15 56 140 43 4 -15 15 45 141 54 22 -15 15 56 140 22 57 -15 15 37 -0.44
141 6 12 -15 37 30 16 28 39.5 66 91 -50 141 31 53 -15 37 34 140 40 26 -15 37 23 141 51 51 -15 37 35 140 20 18 -15 37 15 -0.44
141 3 33 -15 59 8 16 28 49.7 66 90 -49 141 29 18 -15 59 12 140 37 45 -15 59 1 141 49 17 -15 59 13 140 17 34 -15 58 54 -0.44
141 0 51 -16 20 46 16 28 59.8 66 89 -49 141 26 38 -16 20 50 140 34 59 -16 20 39 141 46 40 -16 20 51 140 14 47 -16 20 32 -0.44
140 58 5 -16 42 25 16 29 10.0 66 88 -49 141 23 55 -16 42 29 140 32 10 -16 42 18 141 43 59 -16 42 30 140 11 55 -16 42 10 -0.44
140 55 15 -17 4 3 16 29 20.1 66 87 -48 141 21 8 -17 4 7 140 29 17 -17 3 56 141 41 14 -17 4 8 140 9 0 -17 3 48 -0.43
140 52 21 -17 25 41 16 29 30.3 66 87 -48 141 18 17 -17 25 45 140 26 20 -17 25 34 141 38 26 -17 25 47 140 6 0 -17 25 26 -0.43
140 49 23 -17 47 20 16 29 40.4 66 86 -48 141 15 22 -17 47 24 140 23 19 -17 47 13 141 35 34 -17 47 25 140 2 57 -17 47 5 -0.43
140 46 22 -18 8 59 16 29 50.6 66 85 -48 141 12 24 -18 9 3 140 20 14 -18 8 51 141 32 38 -18 9 4 139 59 50 -18 8 44 -0.43
140 43 16 -18 30 38 16 30 0.7 66 84 -47 141 9 22 -18 30 42 140 17 6 -18 30 31 141 29 38 -18 30 43 139 56 38 -18 30 23 -0.43
140 40 7 -18 52 17 16 30 10.9 66 83 -47 141 6 16 -18 52 22 140 13 53 -18 52 10 141 26 35 -18 52 23 139 53 23 -18 52 2 -0.43
140 36 53 -19 13 57 16 30 21.0 66 83 -47 141 3 6 -19 14 2 140 10 36 -19 13 50 141 23 28 -19 14 3 139 50 3 -19 13 41 -0.43
140 33 36 -19 35 37 16 30 31.2 66 82 -46 140 59 52 -19 35 42 140 7 15 -19 35 30 141 20 17 -19 35 43 139 46 39 -19 35 22 -0.43
140 30 14 -19 57 18 16 30 41.3 66 81 -46 140 56 34 -19 57 23 140 3 50 -19 57 10 141 17 2 -19 57 24 139 43 11 -19 57 2 -0.43
140 26 49 -20 18 59 16 30 51.5 66 80 -46 140 53 12 -20 19 4 140 0 20 -20 18 51 141 13 43 -20 19 6 139 39 39 -20 18 43 -0.43
140 23 19 -20 40 41 16 31 1.6 66 79 -46 140 49 46 -20 40 46 139 56 47 -20 40 33 141 10 20 -20 40 48 139 36 2 -20 40 25 -0.43
140 19 45 -21 2 24 16 31 11.8 66 79 -45 140 46 17 -21 2 29 139 53 9 -21 2 15 141 6 53 -21 2 31 139 32 21 -21 2 7 -0.43
140 16 7 -21 24 7 16 31 21.9 65 78 -45 140 42 43 -21 24 12 139 49 27 -21 23 58 141 3 22 -21 24 14 139 28 36 -21 23 50 -0.43
140 12 25 -21 45 51 16 31 32.1 65 77 -45 140 39 4 -21 45 56 139 45 40 -21 45 42 140 59 47 -21 45 58 139 24 46 -21 45 33 -0.42
140 8 38 -22 7 35 16 31 42.2 65 76 -44 140 35 22 -22 7 41 139 41 49 -22 7 27 140 56 8 -22 7 43 139 20 51 -22 7 18 -0.42
140 4 47 -22 29 21 16 31 52.4 65 76 -44 140 31 35 -22 29 27 139 37 54 -22 29 12 140 52 25 -22 29 29 139 16 53 -22 29 3 -0.42
140 0 52 -22 51 7 16 32 2.5 65 75 -44 140 27 44 -22 51 13 139 33 54 -22 50 58 140 48 38 -22 51 16 139 12 49 -22 50 49 -0.42
139 56 52 -23 12 55 16 32 12.7 65 74 -44 140 23 49 -23 13 1 139 29 49 -23 12 45 140 44 46 -23 13 3 139 8 41 -23 12 36 -0.42
139 52 47 -23 34 43 16 32 22.8 65 73 -43 140 19 49 -23 34 49 139 25 40 -23 34 34 140 40 50 -23 34 52 139 4 28 -23 34 24 -0.42
139 48 38 -23 56 32 16 32 33.0 65 73 -43 140 15 45 -23 56 39 139 21 26 -23 56 23 140 36 49 -23 56 42 139 0 10 -23 56 13 -0.42
139 44 24 -24 18 23 16 32 43.1 65 72 -43 140 11 36 -24 18 30 139 17 7 -24 18 13 140 32 44 -24 18 33 138 55 48 -24 18 3 -0.42
139 40 6 -24 40 15 16 32 53.3 64 71 -42 140 7 22 -24 40 22 139 12 44 -24 40 4 140 28 34 -24 40 25 138 51 20 -24 39 54 -0.42
139 35 42 -25 2 8 16 33 3.4 64 71 -42 140 3 4 -25 2 15 139 8 15 -25 1 57 140 24 20 -25 2 18 138 46 48 -25 1 47 -0.42
139 31 14 -25 24 2 16 33 13.6 64 70 -42 139 58 41 -25 24 9 139 3 42 -25 23 51 140 20 1 -25 24 12 138 42 10 -25 23 40 -0.42
139 26 41 -25 45 57 16 33 23.7 64 69 -42 139 54 14 -25 46 5 138 59 3 -25 45 46 140 15 38 -25 46 8 138 37 28 -25 45 35 -0.42
139 22 3 -26 7 54 16 33 33.9 64 69 -41 139 49 41 -26 8 2 138 54 20 -26 7 43 140 11 9 -26 8 6 138 32 40 -26 7 32 -0.42
139 17 20 -26 29 52 16 33 44.0 64 68 -41 139 45 3 -26 30 0 138 49 31 -26 29 41 140 6 36 -26 30 4 138 27 46 -26 29 29 -0.42
139 12 31 -26 51 52 16 33 54.2 63 67 -41 139 40 21 -26 52 0 138 44 37 -26 51 40 140 1 58 -26 52 5 138 22 48 -26 51 28 -0.42
139 7 38 -27 13 53 16 34 4.3 63 67 -40 139 35 33 -27 14 2 138 39 37 -27 13 41 139 57 15 -27 14 7 138 17 43 -27 13 29 -0.41
139 2 39 -27 35 56 16 34 14.5 63 66 -40 139 30 40 -27 36 5 138 34 32 -27 35 44 139 52 26 -27 36 10 138 12 34 -27 35 31 -0.41
138 57 34 -27 58 1 16 34 24.6 63 65 -40 139 25 42 -27 58 10 138 29 21 -27 57 48 139 47 33 -27 58 15 138 7 18 -27 57 35 -0.41
138 52 24 -28 20 7 16 34 34.8 63 65 -39 139 20 38 -28 20 17 138 24 5 -28 19 54 139 42 34 -28 20 22 138 1 57 -28 19 41 -0.41
138 47 8 -28 42 15 16 34 44.9 63 64 -39 139 15 28 -28 42 25 138 18 43 -28 42 1 139 37 29 -28 42 31 137 56 30 -28 41 48 -0.41
138 41 47 -29 4 25 16 34 55.1 62 64 -39 139 10 13 -29 4 35 138 13 15 -29 4 11 139 32 19 -29 4 41 137 50 56 -29 3 58 -0.41
138 36 19 -29 26 37 16 35 5.2 62 63 -39 139 4 53 -29 26 47 138 7 41 -29 26 22 139 27 4 -29 26 54 137 45 17 -29 26 9 -0.41
138 30 46 -29 48 50 16 35 15.4 62 63 -38 138 59 26 -29 49 2 138 2 0 -29 48 36 139 21 43 -29 49 8 137 39 31 -29 48 22 -0.41
138 25 7 -30 11 6 16 35 25.6 62 62 -38 138 53 54 -30 11 18 137 56 14 -30 10 51 139 16 15 -30 11 24 137 33 39 -30 10 36 -0.41
138 19 21 -30 33 24 16 35 35.7 61 62 -38 138 48 15 -30 33 36 137 50 21 -30 33 8 139 10 42 -30 33 43 137 27 41 -30 32 53 -0.41
138 13 29 -30 55 44 16 35 45.9 61 61 -37 138 42 30 -30 55 56 137 44 21 -30 55 28 139 5 3 -30 56 4 137 21 36 -30 55 13 -0.41
138 7 30 -31 18 6 16 35 56.0 61 60 -37 138 36 39 -31 18 19 137 38 15 -31 17 49 138 59 18 -31 18 27 137 15 24 -31 17 34 -0.41
138 1 25 -31 40 30 16 36 6.2 61 60 -37 138 30 41 -31 40 44 137 32 2 -31 40 13 138 53 26 -31 40 52 137 9 5 -31 39 57 -0.41
137 55 13 -32 2 57 16 36 16.3 61 59 -36 138 24 37 -32 3 11 137 25 42 -32 2 39 138 47 28 -32 3 19 137 2 39 -32 2 23 -0.41
137 48 54 -32 25 26 16 36 26.5 60 59 -36 138 18 26 -32 25 41 137 19 16 -32 25 8 138 41 23 -32 25 49 136 56 5 -32 24 51 -0.41
137 42 28 -32 47 58 16 36 36.6 60 59 -36 138 12 8 -32 48 13 137 12 41 -32 47 39 138 35 12 -32 48 22 136 49 25 -32 47 22 -0.41
137 35 55 -33 10 32 16 36 46.8 60 58 -36 138 5 43 -33 10 47 137 6 0 -33 10 13 138 28 53 -33 10 57 136 42 36 -33 9 55 -0.41
137 29 14 -33 33 9 16 36 56.9 60 58 -35 137 59 11 -33 33 25 136 59 10 -33 32 49 138 22 27 -33 33 35 136 35 40 -33 32 31 -0.41
137 22 25 -33 55 48 16 37 7.1 59 57 -35 137 52 32 -33 56 5 136 52 13 -33 55 28 138 15 55 -33 56 15 136 28 36 -33 55 9 -0.40
137 15 29 -34 18 30 16 37 17.2 59 57 -35 137 45 44 -34 18 47 136 45 8 -34 18 9 138 9 14 -34 18 58 136 21 24 -34 17 50 -0.40
137 8 25 -34 41 15 16 37 27.4 59 56 -34 137 38 49 -34 41 33 136 37 55 -34 40 53 138 2 26 -34 41 44 136 14 4 -34 40 34 -0.40
137 1 13 -35 4 3 16 37 37.5 59 56 -34 137 31 46 -35 4 21 136 30 33 -35 3 41 137 55 31 -35 4 33 136 6 35 -35 3 20 -0.40
136 53 52 -35 26 54 16 37 47.7 58 55 -34 137 24 35 -35 27 13 136 23 3 -35 26 31 137 48 27 -35 27 25 135 58 57 -35 26 10 -0.40
136 46 23 -35 49 47 16 37 57.8 58 55 -33 137 17 16 -35 50 7 136 15 24 -35 49 24 137 41 15 -35 50 20 135 51 10 -35 49 2 -0.40
136 38 45 -36 12 44 16 38 8.0 58 55 -33 137 9 48 -36 13 5 136 7 36 -36 12 20 137 33 55 -36 13 18 135 43 14 -36 11 58 -0.40
136 30 58 -36 35 44 16 38 18.1 57 54 -33 137 2 11 -36 36 6 135 59 38 -36 35 19 137 26 26 -36 36 19 135 35 9 -36 34 56 -0.40
136 23 1 -36 58 48 16 38 28.3 57 54 -32 136 54 25 -36 59 10 135 51 31 -36 58 22 137 18 48 -36 59 24 135 26 53 -36 57 58 -0.40
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