|
|
Updated: 2021 OCT 21, 16:51 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 2021 Nov 12 UT, the 82.2 km diameter asteroid (84) Klio will occult a 12.1 mag star in the constellation Capricornus for observers along a fairly broad path across New Zealand, including most of the South Island and the east coast of the North Island, including Christchurch and Wellington.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.40 mag to 13.18 mag (the magnitude of the asteroid) for at most 3.120 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, 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.
Occultation of TYC 6331-00355-1 by 84 Klio on 2021 Nov 12
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
160 49 50 -49 54 12 10 38 23.5 30 283 -15 159 50 43 -49 37 54 161 50 56 -50 10 12 159 49 0 -49 37 25 161 52 45 -50 10 40 1.43
161 10 6 -49 41 31 10 38 24.6 30 282 -16 160 10 54 -49 25 20 162 11 17 -49 57 21 160 9 11 -49 24 51 162 13 7 -49 57 49 1.43
161 30 27 -49 28 47 10 38 25.7 30 282 -16 160 31 10 -49 12 45 162 31 44 -49 44 29 160 29 27 -49 12 17 162 33 34 -49 44 57 1.43
161 50 53 -49 16 3 10 38 26.9 30 282 -16 160 51 30 -49 0 9 162 52 16 -49 31 35 160 49 47 -48 59 41 162 54 6 -49 32 3 1.43
162 11 24 -49 3 16 10 38 28.0 30 281 -17 161 11 55 -48 47 31 163 12 53 -49 18 40 161 10 11 -48 47 3 163 14 44 -49 19 7 1.43
162 32 0 -48 50 28 10 38 29.1 30 281 -17 161 32 24 -48 34 52 163 33 37 -49 5 43 161 30 40 -48 34 24 163 35 27 -49 6 9 1.43
162 52 41 -48 37 38 10 38 30.3 29 280 -17 161 52 58 -48 22 11 163 54 26 -48 52 44 161 51 15 -48 21 43 163 56 17 -48 53 10 1.43
163 13 29 -48 24 47 10 38 31.4 29 280 -18 162 13 38 -48 9 28 164 15 21 -48 39 43 162 11 54 -48 9 1 164 17 12 -48 40 9 1.43
163 34 22 -48 11 53 10 38 32.6 29 280 -18 162 34 23 -47 56 43 164 36 23 -48 26 40 162 32 39 -47 56 16 164 38 15 -48 27 6 1.43
163 55 22 -47 58 57 10 38 33.7 29 279 -18 162 55 15 -47 43 57 164 57 32 -48 13 35 162 53 30 -47 43 30 164 59 24 -48 14 0 1.43
164 16 28 -47 46 0 10 38 34.8 29 279 -19 163 16 12 -47 31 8 165 18 49 -48 0 28 163 14 27 -47 30 42 165 20 41 -48 0 53 1.43
164 37 41 -47 33 0 10 38 36.0 28 278 -19 163 37 16 -47 18 18 165 40 12 -47 47 18 163 35 31 -47 17 51 165 42 5 -47 47 43 1.43
164 59 2 -47 19 58 10 38 37.1 28 278 -19 163 58 26 -47 5 25 166 1 44 -47 34 6 163 56 41 -47 4 59 166 3 37 -47 34 31 1.43
165 20 30 -47 6 53 10 38 38.2 28 278 -19 164 19 44 -46 52 30 166 23 24 -47 20 52 164 17 58 -46 52 4 166 25 17 -47 21 16 1.43
165 42 7 -46 53 46 10 38 39.4 28 277 -20 164 41 8 -46 39 33 166 45 13 -47 7 35 164 39 23 -46 39 7 166 47 7 -47 7 59 1.43
166 3 51 -46 40 37 10 38 40.5 28 277 -20 165 2 41 -46 26 33 167 7 11 -46 54 15 165 0 55 -46 26 8 167 9 5 -46 54 39 1.43
166 25 45 -46 27 25 10 38 41.7 27 276 -20 165 24 22 -46 13 31 167 29 19 -46 40 53 165 22 35 -46 13 6 167 31 13 -46 41 16 1.43
166 47 47 -46 14 10 10 38 42.8 27 276 -21 165 46 11 -46 0 26 167 51 36 -46 27 27 165 44 24 -46 0 1 167 53 31 -46 27 50 1.43
167 9 59 -46 0 52 10 38 43.9 27 276 -21 166 8 8 -45 47 19 168 14 4 -46 13 58 166 6 21 -45 46 54 168 15 59 -46 14 21 1.44
167 32 22 -45 47 31 10 38 45.1 27 275 -21 166 30 15 -45 34 8 168 36 42 -46 0 26 166 28 28 -45 33 44 168 38 38 -46 0 49 1.44
167 54 54 -45 34 7 10 38 46.2 26 275 -22 166 52 32 -45 20 55 168 59 33 -45 46 51 166 50 44 -45 20 31 169 1 29 -45 47 13 1.44
168 17 38 -45 20 40 10 38 47.3 26 274 -22 167 14 59 -45 7 38 169 22 35 -45 33 12 167 13 10 -45 7 15 169 24 32 -45 33 34 1.44
168 40 33 -45 7 9 10 38 48.5 26 274 -22 167 37 36 -44 54 19 169 45 49 -45 19 30 167 35 47 -44 53 56 169 47 47 -45 19 51 1.44
169 3 40 -44 53 35 10 38 49.6 26 274 -23 168 0 24 -44 40 56 170 9 17 -45 5 44 167 58 35 -44 40 33 170 11 15 -45 6 4 1.44
169 26 59 -44 39 57 10 38 50.7 25 273 -23 168 23 24 -44 27 29 170 32 58 -44 51 53 168 21 34 -44 27 7 170 34 57 -44 52 14 1.44
169 50 32 -44 26 15 10 38 51.9 25 273 -23 168 46 36 -44 13 59 170 56 54 -44 37 58 168 44 45 -44 13 37 170 58 54 -44 38 19 1.44
170 14 18 -44 12 29 10 38 53.0 25 273 -24 169 10 1 -44 0 25 171 21 5 -44 23 59 169 8 9 -44 0 3 171 23 6 -44 24 19 1.44
170 38 19 -43 58 39 10 38 54.2 25 272 -24 169 33 39 -43 46 47 171 45 32 -44 9 55 169 31 47 -43 46 26 171 47 33 -44 10 15 1.44
171 2 36 -43 44 44 10 38 55.3 24 272 -24 169 57 30 -43 33 5 172 10 16 -43 55 47 169 55 38 -43 32 44 172 12 18 -43 56 6 1.44
171 27 8 -43 30 44 10 38 56.4 24 271 -25 170 21 37 -43 19 18 172 35 17 -43 41 33 170 19 43 -43 18 58 172 37 20 -43 41 51 1.44
171 51 57 -43 16 39 10 38 57.6 24 271 -25 170 45 58 -43 5 27 173 0 37 -43 27 14 170 44 4 -43 5 7 173 2 41 -43 27 32 1.44
172 17 3 -43 2 30 10 38 58.7 23 271 -25 171 10 36 -42 51 31 173 26 16 -43 12 49 171 8 41 -42 51 11 173 28 21 -43 13 6 1.44
172 42 29 -42 48 14 10 38 59.8 23 270 -26 171 35 31 -42 37 30 173 52 16 -42 58 17 171 33 35 -42 37 11 173 54 22 -42 58 35 1.44
173 8 13 -42 33 53 10 39 1.0 23 270 -26 172 0 43 -42 23 24 174 18 38 -42 43 40 171 58 46 -42 23 5 174 20 45 -42 43 57 1.44
173 34 19 -42 19 26 10 39 2.1 22 269 -26 172 26 14 -42 9 12 174 45 22 -42 28 56 172 24 17 -42 8 54 174 47 31 -42 29 12 1.44
174 0 46 -42 4 52 10 39 3.3 22 269 -27 172 52 5 -41 54 55 175 12 32 -42 14 5 172 50 6 -41 54 36 175 14 41 -42 14 20 1.44
174 27 37 -41 50 12 10 39 4.4 22 269 -27 173 18 17 -41 40 31 175 40 7 -41 59 6 173 16 17 -41 40 13 175 42 18 -41 59 21 1.44
174 54 52 -41 35 24 10 39 5.5 21 268 -28 173 44 51 -41 26 0 176 8 10 -41 43 59 173 42 50 -41 25 43 176 10 22 -41 44 13 1.44
175 22 33 -41 20 29 10 39 6.7 21 268 -28 174 11 48 -41 11 23 176 36 42 -41 28 43 174 9 46 -41 11 6 176 38 56 -41 28 57 1.44
175 50 42 -41 5 25 10 39 7.8 21 267 -28 174 39 9 -40 56 39 177 5 45 -41 13 19 174 37 6 -40 56 22 177 8 1 -41 13 32 1.45
176 19 21 -40 50 13 10 39 8.9 20 267 -29 175 6 57 -40 41 46 177 35 22 -40 57 45 175 4 53 -40 41 31 177 37 40 -40 57 57 1.45
176 48 30 -40 34 52 10 39 10.1 20 267 -29 175 35 13 -40 26 46 178 5 35 -40 42 0 175 33 7 -40 26 31 178 7 55 -40 42 12 1.45
177 18 14 -40 19 21 10 39 11.2 19 266 -29 176 3 59 -40 11 37 178 36 27 -40 26 4 176 1 51 -40 11 22 178 38 49 -40 26 15 1.45
177 48 34 -40 3 40 10 39 12.4 19 266 -30 176 33 16 -39 56 18 179 8 0 -40 9 56 176 31 7 -39 56 5 179 10 24 -40 10 6 1.45
178 19 32 -39 47 47 10 39 13.5 19 265 -30 177 3 8 -39 40 50 179 40 18 -39 53 35 177 0 56 -39 40 37 179 42 45 -39 53 44 1.45
178 51 13 -39 31 42 10 39 14.6 18 265 -31 177 33 35 -39 25 11 -179 46 34 -39 37 0 177 31 22 -39 24 59 -179 44 4 -39 37 8 1.45
179 23 39 -39 15 24 10 39 15.8 18 265 -31 178 4 42 -39 9 21 -179 12 33 -39 20 9 178 2 27 -39 9 9 -179 10 0 -39 20 16 1.45
179 56 54 -38 58 52 10 39 16.9 17 264 -31 178 36 32 -38 53 18 -178 37 33 -39 3 2 178 34 14 -38 53 7 -178 34 57 -39 3 8 1.45
Uncertainty in time = +/- 1 secs
Prediction of 2021 Oct 21.0
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]