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Updated: 2017 OCT 01, 15:53 UT
Event Rank : 73
(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 2017 Nov 25 UT, the 28 km diameter asteroid (1132) Hollandia will occult a 10.7 mag star in the constellation Aquarius for observers along a path beginning over South Australia near Port Augusta. The path then moves north-east and into Queensland near Rockhampton and Gladstone.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.71 mag to 15.40 mag (the magnitude of the asteroid) for at most 1.5 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, inparticular 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.
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
133 53 42 -34 41 52 13 31 0 32 278 -31 133 38 15 -34 37 6 134 9 17 -34 46 37 133 18 58 -34 31 4 134 29 7 -34 52 34 1.30
134 48 39 -33 58 11 13 31 5 31 277 -32 134 33 3 -33 53 31 135 4 23 -34 2 51 134 13 36 -33 47 35 135 24 24 -34 8 41 1.30
135 45 2 -33 14 19 13 31 10 30 276 -33 135 29 17 -33 9 44 136 0 57 -33 18 52 135 9 37 -33 3 56 136 21 12 -33 24 35 1.30
136 43 2 -32 30 12 13 31 15 29 275 -34 136 27 4 -32 25 43 136 59 8 -32 34 39 136 7 10 -32 20 3 137 19 39 -32 40 14 1.31
137 42 47 -31 45 49 13 31 21 29 274 -35 137 26 36 -31 41 27 137 59 8 -31 50 10 137 6 25 -31 35 54 138 19 57 -31 55 36 1.31
138 44 32 -31 1 6 13 31 26 28 273 -36 138 28 4 -30 56 51 139 1 9 -31 5 20 138 7 34 -30 51 26 139 22 21 -31 10 37 1.31
139 48 31 -30 16 0 13 31 31 27 272 -37 139 31 44 -30 11 52 140 5 28 -30 20 6 139 10 50 -30 6 37 140 27 5 -30 25 14 1.31
140 55 2 -29 30 27 13 31 37 26 271 -38 140 37 53 -29 26 27 141 12 22 -29 34 25 140 16 32 -29 21 21 141 34 30 -29 39 22 1.32
142 4 27 -28 44 22 13 31 42 25 270 -39 141 46 51 -28 40 30 142 22 14 -28 48 11 141 24 58 -28 35 35 142 44 58 -28 52 56 1.32
143 17 12 -27 57 38 13 31 47 24 269 -40 142 59 5 -27 53 56 143 35 33 -28 1 18 142 36 34 -27 49 13 143 59 0 -28 5 50 1.32
144 33 53 -27 10 9 13 31 53 23 268 -41 144 15 8 -27 6 39 144 52 54 -27 13 37 143 51 50 -27 2 9 145 17 13 -27 17 55 1.33
145 55 13 -26 21 45 13 31 58 21 267 -42 145 35 41 -26 18 27 146 15 3 -26 25 0 145 11 28 -26 14 13 146 40 27 -26 29 0 1.33
147 22 12 -25 32 13 13 32 3 20 266 -43 147 1 41 -25 29 10 147 43 3 -25 35 12 146 36 18 -25 25 14 148 9 48 -25 38 52 1.34
148 56 12 -24 41 16 13 32 9 19 266 -44 148 34 26 -24 38 32 149 18 22 -24 43 56 148 7 34 -24 34 58 149 46 53 -24 47 9 1.35
150 39 14 -23 48 28 13 32 14 17 265 -45 150 15 48 -23 46 7 151 3 10 -23 50 43 149 46 58 -23 43 1 151 34 6 -23 53 23 1.36
152 34 28 -22 53 9 13 32 19 15 264 -46 152 8 42 -22 51 20 153 0 56 -22 54 49 151 37 8 -22 48 52 153 35 21 -22 56 42 1.38
154 47 31 -21 54 9 13 32 24 13 263 -47 154 18 8 -21 53 8 155 17 57 -21 54 57 153 42 28 -21 51 35 155 58 0 -21 55 37 1.41
Uncertainty in time = +/- 2 secs
Prediction of 2017 Oct 1.0
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