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Updated: 2022 Jun 13, 20:51 UT
Event Rank : 80
(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 Aug 10 UT, the 56 km diameter asteroid (269) Justitia will occult a 12.1 mag star in the constellation Sagittarius for observers along a slightly uncertain path across New Zealand, passing over Gisborne.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.1 mag to 12.68 mag (the magnitude of the asteroid) for at most 18.6 seconds. Note full moon nearby.
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 UCAC4 365-133617 by 269 Justitia on 2022 Aug 10
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
178 24 51 -37 7 5 10 36 22.7 64 315 -60 178 44 39 -37 6 25 178 5 5 -37 7 43 179 11 20 -37 5 28 177 38 31 -37 8 32 -0.33
178 25 46 -37 30 28 10 36 36.3 64 316 -60 178 45 40 -37 29 48 178 5 53 -37 31 7 179 12 30 -37 28 50 177 39 11 -37 31 56 -0.33
178 26 48 -37 53 55 10 36 49.9 63 316 -59 178 46 49 -37 53 14 178 6 49 -37 54 34 179 13 47 -37 52 16 177 39 58 -37 55 24 -0.33
178 27 57 -38 17 24 10 37 3.4 63 317 -59 178 48 5 -38 16 43 178 7 51 -38 18 4 179 15 12 -38 15 44 177 40 51 -38 18 55 -0.33
178 29 14 -38 40 58 10 37 17.0 63 317 -59 178 49 28 -38 40 16 178 9 1 -38 41 38 179 16 44 -38 39 16 177 41 52 -38 42 29 -0.33
178 30 38 -39 4 34 10 37 30.5 62 317 -59 178 50 59 -39 3 52 178 10 18 -39 5 15 179 18 25 -39 2 51 177 42 59 -39 6 7 -0.34
178 32 9 -39 28 15 10 37 44.1 62 318 -59 178 52 38 -39 27 31 178 11 43 -39 28 56 179 20 13 -39 26 30 177 44 14 -39 29 49 -0.34
178 33 49 -39 51 59 10 37 57.6 62 318 -58 178 54 25 -39 51 15 178 13 15 -39 52 41 179 22 10 -39 50 13 177 45 37 -39 53 34 -0.34
178 35 37 -40 15 46 10 38 11.2 61 319 -58 178 56 21 -40 15 2 178 14 56 -40 16 29 179 24 16 -40 13 59 177 47 7 -40 17 23 -0.34
178 37 34 -40 39 38 10 38 24.8 61 319 -58 178 58 25 -40 38 53 178 16 45 -40 40 21 179 26 31 -40 37 49 177 48 46 -40 41 16 -0.34
178 39 39 -41 3 33 10 38 38.3 61 319 -58 179 0 38 -41 2 47 178 18 42 -41 4 17 179 28 55 -41 1 43 177 50 33 -41 5 13 -0.34
178 41 54 -41 27 33 10 38 51.9 60 320 -57 179 3 0 -41 26 46 178 20 48 -41 28 17 179 31 28 -41 25 41 177 52 28 -41 29 14 -0.34
178 44 17 -41 51 36 10 39 5.4 60 320 -57 179 5 32 -41 50 49 178 23 4 -41 52 22 179 34 11 -41 49 43 177 54 33 -41 53 19 -0.34
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
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