|
|
Updated: 2018 Aug 12, 18:31 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 2018 Oct 09 UT, the 146 km diameter asteroid (173) Ino will occult a 10.8 mag star in the constellation Aquarius for observers along a path across southern South Australia, western Victoria, western New South Wales and southern Queensland, running from Millicent, over Mount Gambier and Mildura, to Rockhampton.
In the case of an occultation, the combined light of the asteroid and the star will drop by only 0.73 mag to 10.75 mag (the magnitude of the asteroid) for at most 23.3 seconds. This event may be difficult to observe visually.
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 367-183545 by 173 Ino on 2018 Oct 9
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
156 5 21 -18 11 43 17 4 31 20 259 -30 157 54 17 -18 10 15 154 24 24 -18 10 42 158 29 50 -18 9 11 153 54 37 -18 9 57 1.32
155 21 42 -18 48 52 17 4 41 21 259 -31 157 7 36 -18 48 27 153 43 5 -18 47 0 157 42 1 -18 47 47 153 13 55 -18 46 1 1.32
154 39 56 -19 25 28 17 4 51 22 259 -31 156 23 12 -19 26 0 153 3 22 -19 22 49 156 56 39 -19 25 40 152 34 45 -19 21 39 1.32
153 59 51 -20 1 34 17 5 0 23 260 -31 155 40 50 -20 2 56 152 25 6 -19 58 14 156 13 27 -20 2 54 151 56 58 -19 56 52 1.32
153 21 19 -20 37 14 17 5 10 23 260 -32 155 0 17 -20 39 22 151 48 10 -20 33 16 155 32 10 -20 39 36 151 20 27 -20 31 44 1.32
152 44 10 -21 12 30 17 5 20 24 261 -32 154 21 21 -21 15 20 151 12 27 -21 7 58 154 52 37 -21 15 48 150 45 7 -21 6 16 1.33
152 8 18 -21 47 25 17 5 30 25 261 -32 153 43 55 -21 50 52 150 37 51 -21 42 21 154 14 37 -21 51 34 150 10 52 -21 40 30 1.33
151 33 37 -22 22 1 17 5 40 25 261 -32 153 7 51 -22 26 3 150 4 18 -22 16 27 153 38 2 -22 26 56 149 37 37 -22 14 28 1.33
151 0 2 -22 56 19 17 5 49 26 262 -32 152 33 1 -23 0 53 149 31 43 -22 50 18 153 2 46 -23 1 57 149 5 19 -22 48 11 1.33
150 27 27 -23 30 21 17 5 59 26 262 -33 151 59 20 -23 35 25 149 0 3 -23 23 54 152 28 41 -23 36 39 148 33 53 -23 21 40 1.33
149 55 50 -24 4 9 17 6 9 27 263 -33 151 26 43 -24 9 40 148 29 14 -23 57 17 151 55 44 -24 11 4 148 3 17 -23 54 56 1.33
149 25 6 -24 37 43 17 6 19 27 263 -33 150 55 7 -24 43 39 147 59 13 -24 30 29 151 23 49 -24 45 12 147 33 28 -24 28 1 1.34
148 55 12 -25 11 4 17 6 28 28 264 -33 150 24 26 -25 17 25 147 29 58 -25 3 29 150 52 51 -25 19 6 147 4 24 -25 0 55 1.34
148 26 6 -25 44 15 17 6 38 28 264 -33 149 54 38 -25 50 58 147 1 26 -25 36 19 150 22 49 -25 52 47 146 36 1 -25 33 39 1.34
147 57 44 -26 17 15 17 6 48 29 265 -33 149 25 39 -26 24 20 146 33 34 -26 9 0 149 53 37 -26 26 16 146 8 18 -26 6 14 1.34
147 30 5 -26 50 5 17 6 58 29 265 -33 148 57 28 -26 57 31 146 6 22 -26 41 32 149 25 14 -26 59 33 145 41 13 -26 38 41 1.34
147 3 7 -27 22 47 17 7 8 29 266 -33 148 30 1 -27 30 32 145 39 47 -27 13 56 148 57 37 -27 32 41 145 14 44 -27 11 0 1.34
146 36 47 -27 55 21 17 7 17 30 266 -33 148 3 17 -28 3 24 145 13 47 -27 46 13 148 30 44 -28 5 39 144 48 49 -27 43 12 1.34
146 11 5 -28 27 47 17 7 27 30 266 -33 147 37 13 -28 36 9 144 48 21 -28 18 24 148 4 32 -28 38 29 144 23 28 -28 15 18 1.35
145 45 57 -29 0 7 17 7 37 31 267 -33 147 11 47 -29 8 45 144 23 28 -28 50 28 147 39 0 -29 11 12 143 58 39 -28 47 18 1.35
145 21 24 -29 32 21 17 7 47 31 267 -33 146 46 59 -29 41 15 143 59 7 -29 22 27 147 14 7 -29 43 47 143 34 20 -29 19 13 1.35
144 57 24 -30 4 30 17 7 56 31 268 -33 146 22 47 -30 13 39 143 35 15 -29 54 22 146 49 50 -30 16 16 143 10 31 -29 51 3 1.35
144 33 55 -30 36 33 17 8 6 32 268 -33 145 59 8 -30 45 57 143 11 53 -30 26 11 146 26 8 -30 48 39 142 47 10 -30 22 49 1.35
144 10 57 -31 8 32 17 8 16 32 269 -33 145 36 4 -31 18 11 142 48 59 -30 57 57 146 3 0 -31 20 57 142 24 18 -30 54 30 1.36
143 48 28 -31 40 27 17 8 26 32 269 -33 145 13 31 -31 50 19 142 26 33 -31 29 39 145 40 26 -31 53 10 142 1 52 -31 26 9 1.36
143 26 29 -32 12 19 17 8 36 32 270 -33 144 51 29 -32 22 24 142 4 33 -32 1 18 145 18 23 -32 25 19 141 39 52 -31 57 44 1.36
143 4 57 -32 44 7 17 8 45 33 270 -33 144 29 58 -32 54 25 141 43 0 -32 32 54 144 56 51 -32 57 24 141 18 17 -32 29 17 1.36
142 43 52 -33 15 53 17 8 55 33 271 -33 144 8 56 -33 26 24 141 21 51 -33 4 28 144 35 50 -33 29 26 140 57 7 -33 0 47 1.36
142 23 15 -33 47 36 17 9 5 33 271 -33 143 48 23 -33 58 19 141 1 7 -33 36 0 144 15 18 -34 1 26 140 36 21 -33 32 16 1.36
142 3 3 -34 19 18 17 9 15 33 272 -33 143 28 18 -34 30 13 140 40 47 -34 7 31 143 55 15 -34 33 23 140 15 59 -34 3 43 1.37
141 43 17 -34 50 58 17 9 24 34 273 -33 143 8 41 -35 2 4 140 20 51 -34 39 0 143 35 41 -35 5 18 139 55 59 -34 35 9 1.37
141 23 55 -35 22 37 17 9 34 34 273 -33 142 49 31 -35 33 54 140 1 19 -35 10 29 143 16 34 -35 37 12 139 36 23 -35 6 34 1.37
141 4 59 -35 54 15 17 9 44 34 274 -32 142 30 48 -36 5 43 139 42 9 -35 41 56 142 57 55 -36 9 4 139 17 9 -35 37 59 1.37
140 46 27 -36 25 53 17 9 54 34 274 -32 142 12 31 -36 37 32 139 23 21 -36 13 24 142 39 43 -36 40 56 138 58 17 -36 9 23 1.37
140 28 19 -36 57 31 17 10 4 34 275 -32 141 54 40 -37 9 20 139 4 56 -36 44 52 142 21 57 -37 12 47 138 39 46 -36 40 48 1.37
140 10 34 -37 29 9 17 10 13 34 275 -32 141 37 15 -37 41 8 138 46 52 -37 16 20 142 4 38 -37 44 38 138 21 37 -37 12 13 1.38
139 53 14 -38 0 47 17 10 23 35 276 -32 141 20 15 -38 12 56 138 29 11 -37 47 49 141 47 45 -38 16 30 138 3 49 -37 43 39 1.38
139 36 16 -38 32 27 17 10 33 35 276 -32 141 3 41 -38 44 45 138 11 51 -38 19 19 141 31 18 -38 48 22 137 46 22 -38 15 6 1.38
139 19 42 -39 4 7 17 10 43 35 277 -31 140 47 33 -39 16 35 137 54 52 -38 50 50 141 15 17 -39 20 15 137 29 16 -38 46 34 1.38
139 3 32 -39 35 50 17 10 52 35 277 -31 140 31 49 -39 48 26 137 38 15 -39 22 23 140 59 43 -39 52 9 137 12 31 -39 18 4 1.38
138 47 44 -40 7 33 17 11 2 35 278 -31 140 16 31 -40 20 19 137 21 59 -39 53 58 140 44 34 -40 24 5 136 56 7 -39 49 37 1.39
138 32 20 -40 39 19 17 11 12 35 278 -31 140 1 39 -40 52 14 137 6 5 -40 25 35 140 29 51 -40 56 2 136 40 3 -40 21 11 1.39
138 17 19 -41 11 8 17 11 22 35 279 -30 139 47 12 -41 24 11 136 50 32 -40 57 14 140 15 35 -41 28 2 136 24 21 -40 52 48 1.39
138 2 42 -41 42 59 17 11 32 35 279 -30 139 33 10 -41 56 11 136 35 20 -41 28 57 140 1 45 -42 0 4 136 8 59 -41 24 28 1.39
137 48 28 -42 14 53 17 11 41 35 280 -30 139 19 35 -42 28 13 136 20 30 -42 0 42 139 48 22 -42 32 9 135 53 58 -41 56 10 1.39
137 34 39 -42 46 50 17 11 51 35 280 -30 139 6 26 -43 0 19 136 6 2 -42 32 31 139 35 26 -43 4 18 135 39 18 -42 27 57 1.39
137 21 13 -43 18 52 17 12 1 35 281 -29 138 53 43 -43 32 28 135 51 56 -43 4 24 139 22 57 -43 36 29 135 25 0 -42 59 47 1.40
137 8 12 -43 50 56 17 12 11 35 281 -29 138 41 27 -44 4 41 135 38 12 -43 36 21 139 10 56 -44 8 44 135 11 3 -43 31 41 1.40
136 55 36 -44 23 6 17 12 20 35 282 -29 138 29 39 -44 36 58 135 24 51 -44 8 22 138 59 23 -44 41 4 134 57 28 -44 3 39 1.40
136 43 25 -44 55 19 17 12 30 35 282 -28 138 18 19 -45 9 19 135 11 52 -44 40 27 138 48 19 -45 13 27 134 44 16 -44 35 42 1.40
Uncertainty in time = +/- 6 secs
Prediction of 2018 Aug 12.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
[Top of Page][Return to Home Page]