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Updated: 2022 Feb 14, 19:32 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 2022 Apr 03 UT, the 89 km diameter asteroid (754) Malabar will occult a 11.9 mag star in the constellation Monoceros for observers along a path across West Australia, Northern Territory and northern Queensland, passing over Geraldton.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.8 mag to 14.65 mag (the magnitude of the asteroid) for at most 4.4 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 456-026334 by 754 Malabar on 2022 Apr 3
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
110 58 30 -30 6 36 14 32 3.4 28 289 -51 110 10 22 -29 42 38 111 48 27 -30 30 41 109 54 10 -29 34 24 112 6 7 -30 39 1 1.48
111 16 51 -29 56 28 14 32 4.8 28 289 -52 110 28 27 -29 32 32 112 7 4 -30 20 31 110 12 11 -29 24 19 112 24 49 -30 28 50 1.48
111 35 20 -29 46 21 14 32 6.3 28 289 -52 110 46 41 -29 22 27 112 25 50 -30 10 22 110 30 20 -29 14 15 112 43 42 -30 18 41 1.48
111 53 59 -29 36 15 14 32 7.7 27 288 -52 111 5 5 -29 12 23 112 44 47 -30 0 15 110 48 38 -29 4 12 113 2 46 -30 8 32 1.48
112 12 48 -29 26 11 14 32 9.2 27 288 -53 111 23 37 -29 2 21 113 3 55 -29 50 8 111 7 5 -28 54 10 113 22 0 -29 58 26 1.48
112 31 48 -29 16 8 14 32 10.7 27 288 -53 111 42 19 -28 52 20 113 23 14 -29 40 4 111 25 42 -28 44 10 113 41 26 -29 48 20 1.48
112 50 58 -29 6 7 14 32 12.1 27 288 -53 112 1 12 -28 42 20 113 42 44 -29 30 0 111 44 28 -28 34 11 114 1 3 -29 38 16 1.48
113 10 20 -28 56 6 14 32 13.6 27 287 -54 112 20 14 -28 32 22 114 2 26 -29 19 58 112 3 25 -28 24 13 114 20 53 -29 28 13 1.48
113 29 52 -28 46 7 14 32 15.0 26 287 -54 112 39 27 -28 22 25 114 22 20 -29 9 57 112 22 32 -28 14 16 114 40 56 -29 18 12 1.48
113 49 37 -28 36 9 14 32 16.5 26 287 -54 112 58 52 -28 12 29 114 42 27 -28 59 57 112 41 49 -28 4 21 115 1 11 -29 8 11 1.48
114 9 34 -28 26 13 14 32 18.0 26 287 -55 113 18 27 -28 2 34 115 2 48 -28 49 59 113 1 18 -27 54 26 115 21 40 -28 58 13 1.49
114 29 43 -28 16 17 14 32 19.4 26 286 -55 113 38 15 -27 52 40 115 23 22 -28 40 2 113 20 58 -27 44 33 115 42 23 -28 48 15 1.49
114 50 6 -28 6 23 14 32 20.9 25 286 -55 113 58 14 -27 42 48 115 44 10 -28 30 7 113 40 51 -27 34 42 116 3 21 -28 38 19 1.49
115 10 42 -27 56 31 14 32 22.3 25 286 -56 114 18 26 -27 32 57 116 5 13 -28 20 12 114 0 55 -27 24 51 116 24 34 -28 28 24 1.49
115 31 32 -27 46 39 14 32 23.8 25 285 -56 114 38 52 -27 23 7 116 26 32 -28 10 19 114 21 12 -27 15 2 116 46 3 -28 18 30 1.49
115 52 37 -27 36 49 14 32 25.3 25 285 -56 114 59 31 -27 13 18 116 48 6 -28 0 28 114 41 43 -27 5 13 117 7 49 -28 8 38 1.49
116 13 58 -27 27 0 14 32 26.7 24 285 -57 115 20 24 -27 3 31 117 9 57 -27 50 37 115 2 27 -26 55 26 117 29 52 -27 58 47 1.49
116 35 34 -27 17 12 14 32 28.2 24 285 -57 115 41 31 -26 53 44 117 32 6 -27 40 48 115 23 26 -26 45 41 117 52 13 -27 48 58 1.49
116 57 27 -27 7 26 14 32 29.6 24 284 -57 116 2 54 -26 43 59 117 54 33 -27 31 0 115 44 39 -26 35 56 118 14 52 -27 39 9 1.49
117 19 37 -26 57 41 14 32 31.1 24 284 -58 116 24 33 -26 34 15 118 17 19 -27 21 14 116 6 8 -26 26 13 118 37 52 -27 29 23 1.49
117 42 5 -26 47 57 14 32 32.6 23 284 -58 116 46 28 -26 24 33 118 40 24 -27 11 29 116 27 53 -26 16 31 119 1 11 -27 19 37 1.49
118 4 52 -26 38 14 14 32 34.0 23 283 -58 117 8 41 -26 14 52 119 3 51 -27 1 45 116 49 54 -26 6 50 119 24 53 -27 9 53 1.49
118 27 59 -26 28 33 14 32 35.5 23 283 -59 117 31 11 -26 5 11 119 27 40 -26 52 3 117 12 13 -25 57 10 119 48 57 -27 0 10 1.49
118 51 27 -26 18 53 14 32 36.9 22 283 -59 117 54 1 -25 55 33 119 51 51 -26 42 22 117 34 50 -25 47 32 120 13 26 -26 50 29 1.49
119 15 16 -26 9 15 14 32 38.4 22 283 -60 118 17 10 -25 45 55 120 16 27 -26 32 42 117 57 47 -25 37 54 120 38 19 -26 40 49 1.49
119 39 28 -25 59 37 14 32 39.9 22 282 -60 118 40 39 -25 36 19 120 41 28 -26 23 4 118 21 3 -25 28 18 121 3 39 -26 31 10 1.49
120 4 5 -25 50 1 14 32 41.3 21 282 -60 119 4 30 -25 26 44 121 6 57 -26 13 27 118 44 40 -25 18 44 121 29 27 -26 21 33 1.49
120 29 6 -25 40 27 14 32 42.8 21 282 -61 119 28 44 -25 17 10 121 32 53 -26 3 51 119 8 39 -25 9 10 121 55 46 -26 11 57 1.49
120 54 34 -25 30 53 14 32 44.2 21 282 -61 119 53 22 -25 7 37 121 59 20 -25 54 17 119 33 1 -24 59 38 122 22 35 -26 2 23 1.49
121 20 30 -25 21 21 14 32 45.7 20 281 -62 120 18 25 -24 58 6 122 26 20 -25 44 45 119 57 47 -24 50 7 122 49 59 -25 52 51 1.49
121 46 57 -25 11 51 14 32 47.2 20 281 -62 120 43 54 -24 48 36 122 53 53 -25 35 14 120 22 59 -24 40 38 123 17 59 -25 43 20 1.49
122 13 55 -25 2 22 14 32 48.6 20 281 -62 121 9 51 -24 39 8 123 22 3 -25 25 44 120 48 37 -24 31 9 123 46 37 -25 33 50 1.49
122 41 27 -24 52 54 14 32 50.1 19 280 -63 121 36 18 -24 29 41 123 50 53 -25 16 17 121 14 44 -24 21 42 124 15 56 -25 24 22 1.49
123 9 35 -24 43 28 14 32 51.5 19 280 -63 122 3 17 -24 20 15 124 20 24 -25 6 50 121 41 22 -24 12 17 124 46 1 -25 14 56 1.49
123 38 22 -24 34 4 14 32 53.0 18 280 -64 122 30 49 -24 10 51 124 50 41 -24 57 26 122 8 31 -24 2 53 125 16 54 -25 5 32 1.49
124 7 50 -24 24 41 14 32 54.5 18 280 -64 122 58 58 -24 1 28 125 21 48 -24 48 3 122 36 15 -23 53 30 125 48 39 -24 56 9 1.50
124 38 3 -24 15 19 14 32 55.9 18 279 -65 123 27 44 -23 52 7 125 53 47 -24 38 42 123 4 35 -23 44 9 126 21 21 -24 46 48 1.50
125 9 5 -24 6 0 14 32 57.4 17 279 -65 123 57 12 -23 42 47 126 26 46 -24 29 23 123 33 34 -23 34 49 126 55 7 -24 37 29 1.50
125 40 59 -23 56 42 14 32 58.8 17 279 -65 124 27 23 -23 33 29 127 0 48 -24 20 6 124 3 15 -23 25 31 127 30 1 -24 28 13 1.50
126 13 51 -23 47 26 14 33 0.3 16 278 -66 124 58 23 -23 24 12 127 36 2 -24 10 51 124 33 42 -23 16 14 128 6 13 -24 18 58 1.50
126 47 45 -23 38 12 14 33 1.8 16 278 -66 125 30 15 -23 14 58 128 12 34 -24 1 39 125 4 57 -23 6 59 128 43 52 -24 9 46 1.50
127 22 50 -23 29 0 14 33 3.2 15 278 -67 126 3 3 -23 5 45 128 50 36 -23 52 28 125 37 6 -22 57 46 129 23 8 -24 0 37 1.50
127 59 11 -23 19 50 14 33 4.7 15 278 -67 126 36 54 -22 56 34 129 30 17 -23 43 21 126 10 12 -22 48 35 130 4 15 -23 51 31 1.50
128 36 59 -23 10 43 14 33 6.2 14 277 -68 127 11 53 -22 47 24 130 11 54 -23 34 16 126 44 23 -22 39 25 130 47 32 -23 42 27 1.51
129 16 24 -23 1 38 14 33 7.6 13 277 -68 127 48 8 -22 38 18 130 55 45 -23 25 15 127 19 44 -22 30 18 131 33 22 -23 33 27 1.51
129 57 41 -22 52 36 14 33 9.1 13 277 -69 128 25 48 -22 29 13 131 42 14 -23 16 17 127 56 23 -22 21 13 132 22 13 -23 24 32 1.51
130 41 8 -22 43 37 14 33 10.5 12 276 -69 129 5 3 -22 20 11 132 31 53 -23 7 24 128 34 29 -22 12 10 133 14 49 -23 15 41 1.51
131 27 6 -22 34 42 14 33 12.0 11 276 -70 129 46 8 -22 11 12 133 25 28 -22 58 35 129 14 15 -22 3 10 134 12 11 -23 6 56 1.52
132 16 6 -22 25 51 14 33 13.5 11 276 -70 130 29 19 -22 2 15 134 24 6 -22 49 53 129 55 54 -21 54 12 135 15 53 -22 58 19 1.53
133 8 50 -22 17 4 14 33 14.9 10 275 -71 131 14 57 -21 53 22 135 29 31 -22 41 19 130 39 44 -21 45 18 136 28 40 -22 49 53 1.53
134 6 18 -22 8 24 14 33 16.4 9 275 -71 132 3 32 -21 44 33 136 44 52 -22 32 57 131 26 9 -21 36 27 137 56 2 -22 41 44 1.54
135 10 4 -21 59 51 14 33 17.8 8 274 -72 132 55 42 -21 35 49 138 16 43 -22 24 54 132 15 39 -21 27 40 139 53 28 -22 34 8 1.56
136 22 48 -21 51 29 14 33 19.3 7 274 -73 133 52 24 -21 27 10 140 26 5 -22 17 32 133 8 57 -21 18 58 ... .. .. .. .. .. 1.59
137 49 52 -21 43 23 14 33 20.8 6 273 -73 134 55 3 -21 18 39 ... .. .. .. .. .. 134 7 6 -21 10 22 ... .. .. .. .. .. 1.65
139 45 58 -21 35 50 14 33 22.2 4 273 -74 136 6 3 -21 10 18 ... .. .. .. .. .. 135 11 43 -21 1 54 ... .. .. .. .. .. 1.81
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