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Updated: 2021 Dec 15, 04:13 UT
Event Rank : 100
(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 Feb 13 UT, the 167 km diameter asteroid (106) Dione will occult a 10.5 mag star in the constellation Taurus for observers along a path across New Zealand, passing over Auckland and Whangarei.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 12.79 mag (the magnitude of the asteroid) for at most 16.5 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 1816-00263-1 by 106 Dione on 2022 Feb 13
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
171 28 15 -36 24 22 8 45 21.7 27 341 -14 170 54 45 -34 51 14 172 5 34 -38 2 43 170 53 21 -34 47 13 172 7 19 -38 7 13 1.92
171 45 28 -36 22 56 8 45 24.3 27 340 -15 171 11 35 -34 49 45 172 23 14 -38 1 21 171 10 9 -34 45 44 172 25 1 -38 5 51 1.92
172 2 43 -36 21 34 8 45 26.9 27 340 -15 171 28 26 -34 48 20 172 40 57 -38 0 4 171 27 0 -34 44 18 172 42 45 -38 4 35 1.92
172 20 1 -36 20 17 8 45 29.5 27 340 -15 171 45 20 -34 46 58 172 58 42 -37 58 52 171 43 53 -34 42 57 173 0 32 -38 3 23 1.92
172 37 21 -36 19 3 8 45 32.1 27 339 -15 172 2 16 -34 45 41 173 16 31 -37 57 44 172 0 48 -34 41 39 173 18 22 -38 2 15 1.92
172 54 44 -36 17 54 8 45 34.7 27 339 -15 172 19 14 -34 44 27 173 34 23 -37 56 41 172 17 45 -34 40 25 173 36 15 -38 1 12 1.92
173 12 10 -36 16 50 8 45 37.3 27 339 -16 172 36 15 -34 43 18 173 52 18 -37 55 43 172 34 45 -34 39 16 173 54 12 -38 0 14 1.92
173 29 38 -36 15 49 8 45 39.8 26 338 -16 172 53 19 -34 42 12 174 10 17 -37 54 49 172 51 47 -34 38 10 174 12 12 -37 59 21 1.92
173 47 10 -36 14 53 8 45 42.4 26 338 -16 173 10 25 -34 41 11 174 28 19 -37 54 0 173 8 52 -34 37 8 174 30 15 -37 58 32 1.92
174 4 45 -36 14 2 8 45 45.0 26 338 -16 173 27 33 -34 40 13 174 46 24 -37 53 16 173 26 0 -34 36 10 174 48 22 -37 57 49 1.92
174 22 23 -36 13 14 8 45 47.6 26 338 -17 173 44 45 -34 39 20 175 4 33 -37 52 37 173 43 10 -34 35 17 175 6 33 -37 57 10 1.92
174 40 4 -36 12 32 8 45 50.2 26 337 -17 174 1 59 -34 38 30 175 22 46 -37 52 3 174 0 24 -34 34 27 175 24 48 -37 56 36 1.92
174 57 49 -36 11 53 8 45 52.8 26 337 -17 174 19 17 -34 37 45 175 41 4 -37 51 33 174 17 40 -34 33 41 175 43 6 -37 56 7 1.92
175 15 37 -36 11 20 8 45 55.4 26 337 -17 174 36 38 -34 37 4 175 59 25 -37 51 9 174 35 0 -34 33 0 176 1 29 -37 55 43 1.92
175 33 29 -36 10 50 8 45 58.0 26 336 -17 174 54 1 -34 36 27 176 17 51 -37 50 50 174 52 22 -34 32 23 176 19 56 -37 55 24 1.92
175 51 25 -36 10 26 8 46 0.5 26 336 -18 175 11 29 -34 35 54 176 36 21 -37 50 35 175 9 48 -34 31 50 176 38 28 -37 55 11 1.92
176 9 25 -36 10 6 8 46 3.1 26 336 -18 175 28 59 -34 35 26 176 54 55 -37 50 26 175 27 18 -34 31 21 176 57 5 -37 55 2 1.92
176 27 29 -36 9 50 8 46 5.7 26 336 -18 175 46 33 -34 35 1 177 13 35 -37 50 22 175 44 51 -34 30 56 177 15 46 -37 54 59 1.92
176 45 37 -36 9 40 8 46 8.3 25 335 -18 176 4 11 -34 34 42 177 32 19 -37 50 24 176 2 27 -34 30 36 177 34 32 -37 55 1 1.92
177 3 49 -36 9 34 8 46 10.9 25 335 -18 176 21 53 -34 34 26 177 51 8 -37 50 31 176 20 8 -34 30 20 177 53 23 -37 55 8 1.92
177 22 6 -36 9 33 8 46 13.5 25 335 -19 176 39 38 -34 34 15 178 10 3 -37 50 43 176 37 52 -34 30 9 178 12 20 -37 55 21 1.92
177 40 28 -36 9 37 8 46 16.1 25 334 -19 176 57 28 -34 34 8 178 29 3 -37 51 1 176 55 40 -34 30 2 178 31 22 -37 55 40 1.92
177 58 54 -36 9 46 8 46 18.7 25 334 -19 177 15 21 -34 34 6 178 48 9 -37 51 24 177 13 32 -34 29 59 178 50 30 -37 56 4 1.92
178 17 25 -36 10 0 8 46 21.2 25 334 -19 177 33 19 -34 34 9 179 7 21 -37 51 53 177 31 29 -34 30 1 179 9 43 -37 56 34 1.92
178 36 2 -36 10 20 8 46 23.8 25 333 -20 177 51 22 -34 34 16 179 26 39 -37 52 28 177 49 30 -34 30 8 179 29 3 -37 57 9 1.92
178 54 43 -36 10 44 8 46 26.4 25 333 -20 178 9 29 -34 34 27 179 46 3 -37 53 9 178 7 35 -34 30 19 179 48 29 -37 57 51 1.92
179 13 30 -36 11 14 8 46 29.0 25 333 -20 178 27 40 -34 34 44 -179 54 27 -37 53 55 178 25 46 -34 30 35 -179 51 58 -37 58 38 1.92
179 32 23 -36 11 49 8 46 31.6 24 333 -20 178 45 57 -34 35 5 -179 34 49 -37 54 48 178 44 0 -34 30 56 -179 32 18 -37 59 32 1.92
Use these links for further information:
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