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Updated: 2023 Jun 15, 05:08 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 2023 Aug 12 UT, the 50 km diameter asteroid (472) Roma will occult a 9.2 mag star in the constellation Aquarius for observers along a path across New Zealand, running from Christchurch to Rotorua, passing over Wellington.
In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 12.45 mag (the magnitude of the asteroid) for at most 4.2 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 6389-00295-1 by 472 Roma on 2023 Aug 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
176 56 4 -37 1 11 15 29 0.7 59 298 -42 176 38 21 -36 54 40 177 13 52 -37 7 41 176 28 1 -36 50 50 177 24 21 -37 11 28 0.61
176 45 41 -37 19 11 15 29 3.8 59 299 -42 176 27 55 -37 12 38 177 3 33 -37 25 42 176 17 33 -37 8 47 177 14 4 -37 29 30 0.61
176 35 18 -37 37 11 15 29 6.9 59 299 -42 176 17 28 -37 30 37 176 53 14 -37 43 44 176 7 4 -37 26 45 177 3 47 -37 47 33 0.61
176 24 55 -37 55 13 15 29 10.0 59 300 -42 176 7 2 -37 48 37 176 42 55 -38 1 47 175 56 36 -37 44 45 176 53 30 -38 5 37 0.61
176 14 32 -38 13 16 15 29 13.0 59 301 -42 175 56 35 -38 6 39 176 32 36 -38 19 52 175 46 7 -38 2 46 176 43 13 -38 23 43 0.61
176 4 9 -38 31 20 15 29 16.1 59 301 -42 175 46 8 -38 24 42 176 22 16 -38 37 57 175 35 38 -38 20 47 176 32 56 -38 41 49 0.61
175 53 45 -38 49 26 15 29 19.2 59 302 -42 175 35 40 -38 42 46 176 11 56 -38 56 5 175 25 8 -38 38 50 176 22 38 -38 59 58 0.61
175 43 21 -39 7 33 15 29 22.3 58 302 -42 175 25 12 -39 0 51 176 1 36 -39 14 13 175 14 37 -38 56 55 176 12 20 -39 18 7 0.61
175 32 56 -39 25 41 15 29 25.4 58 303 -43 175 14 44 -39 18 58 175 51 15 -39 32 23 175 4 7 -39 15 1 176 2 2 -39 36 18 0.61
175 22 31 -39 43 51 15 29 28.5 58 304 -43 175 4 15 -39 37 6 175 40 54 -39 50 34 174 53 35 -39 33 8 175 51 43 -39 54 30 0.61
175 12 5 -40 2 2 15 29 31.6 58 304 -43 174 53 45 -39 55 15 175 30 32 -40 8 47 174 43 3 -39 51 17 175 41 24 -40 12 44 0.61
175 1 38 -40 20 15 15 29 34.7 58 305 -43 174 43 14 -40 13 26 175 20 10 -40 27 1 174 32 30 -40 9 27 175 31 4 -40 30 59 0.61
174 51 11 -40 38 29 15 29 37.7 58 306 -43 174 32 42 -40 31 39 175 9 47 -40 45 17 174 21 55 -40 27 38 175 20 43 -40 49 16 0.61
174 40 43 -40 56 44 15 29 40.8 58 306 -43 174 22 10 -40 49 53 174 59 23 -41 3 35 174 11 20 -40 45 51 175 10 22 -41 7 34 0.61
174 30 14 -41 15 2 15 29 43.9 58 307 -43 174 11 36 -41 8 9 174 48 58 -41 21 54 174 0 44 -41 4 6 175 0 0 -41 25 54 0.61
174 19 44 -41 33 21 15 29 47.0 58 307 -43 174 1 2 -41 26 26 174 38 33 -41 40 14 173 50 7 -41 22 22 174 49 37 -41 44 16 0.61
174 9 13 -41 51 42 15 29 50.1 58 308 -43 173 50 26 -41 44 45 174 28 6 -41 58 37 173 39 29 -41 40 40 174 39 13 -42 2 39 0.61
173 58 40 -42 10 4 15 29 53.2 58 309 -43 173 39 49 -42 3 6 174 17 39 -42 17 1 173 28 50 -41 59 0 174 28 49 -42 21 5 0.61
173 48 7 -42 28 28 15 29 56.3 58 309 -43 173 29 11 -42 21 28 174 7 10 -42 35 27 173 18 9 -42 17 21 174 18 23 -42 39 32 0.61
173 37 33 -42 46 55 15 29 59.4 57 310 -43 173 18 32 -42 39 53 173 56 41 -42 53 55 173 7 27 -42 35 45 174 7 56 -42 58 1 0.61
173 26 57 -43 5 23 15 30 2.4 57 310 -43 173 7 51 -42 58 19 173 46 10 -43 12 25 172 56 43 -42 54 10 173 57 28 -43 16 32 0.61
173 16 20 -43 23 53 15 30 5.5 57 311 -43 172 57 9 -43 16 47 173 35 38 -43 30 57 172 45 58 -43 12 37 173 46 59 -43 35 5 0.61
173 5 41 -43 42 25 15 30 8.6 57 312 -43 172 46 25 -43 35 17 173 25 4 -43 49 31 172 35 12 -43 31 6 173 36 29 -43 53 40 0.61
172 55 1 -44 0 59 15 30 11.7 57 312 -43 172 35 40 -43 53 50 173 14 29 -44 8 7 172 24 23 -43 49 38 173 25 57 -44 12 17 0.61
172 33 35 -44 38 14 15 30 17.9 57 313 -43 172 14 4 -44 31 1 172 53 15 -44 45 26 172 2 41 -44 26 46 173 4 49 -44 49 38 0.61
172 22 50 -44 56 55 15 30 21.0 57 314 -43 172 3 13 -44 49 39 172 42 35 -45 4 8 171 51 47 -44 45 24 172 54 13 -45 8 22 0.61
172 12 3 -45 15 37 15 30 24.1 57 315 -43 171 52 21 -45 8 20 172 31 53 -45 22 53 171 40 52 -45 4 3 172 43 34 -45 27 8 0.61
172 1 14 -45 34 23 15 30 27.1 56 315 -42 171 41 26 -45 27 3 172 21 10 -45 41 41 171 29 54 -45 22 45 172 32 55 -45 45 57 0.61
171 50 23 -45 53 10 15 30 30.2 56 316 -42 171 30 29 -45 45 49 172 10 25 -46 0 30 171 18 53 -45 41 30 172 22 13 -46 4 47 0.61
171 39 30 -46 12 0 15 30 33.3 56 316 -42 171 19 30 -46 4 37 171 59 38 -46 19 22 171 7 51 -46 0 16 172 11 29 -46 23 41 0.61
171 28 34 -46 30 53 15 30 36.4 56 317 -42 171 8 28 -46 23 27 171 48 48 -46 38 17 170 56 46 -46 19 6 172 0 43 -46 42 37 0.61
171 17 36 -46 49 48 15 30 39.5 56 317 -42 170 57 24 -46 42 20 171 37 57 -46 57 14 170 45 38 -46 37 57 171 49 55 -47 1 35 0.61
171 6 36 -47 8 46 15 30 42.6 56 318 -42 170 46 18 -47 1 16 171 27 3 -47 16 14 170 34 28 -46 56 51 171 39 5 -47 20 36 0.61
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