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Updated: 2023 Aug 26, 23:56 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 Oct 07 UT, the 124 km diameter asteroid (276) Adelheid will occult a 10.2 mag star in the constellation Orion for observers along a path running near eastern Australian coast with a small probability of a path shift over south-eastern Queensland.
In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 13.92 mag (the magnitude of the asteroid) for at most 10.2 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 0700-01188-1 by 276 Adelheid on 2023 Oct 7
Centre Star Star Sun Path Limits Error Limits Alt
E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' "
Longitude Longitude Longitude Longitude
152 45 56 -45 0 0 15 1 11.1 21 52 -36 151 17 53 154 11 4 150 50 43 154 36 12 -1.38
153 14 38 -44 0 0 15 1 5.0 22 52 -37 151 49 3 154 37 30 151 22 40 155 1 59 -1.38
153 40 4 -43 0 0 15 0 58.6 23 52 -38 152 16 43 155 0 53 151 51 3 155 24 47 -1.38
155 16 10 -37 0 0 15 0 17.2 27 53 -42 154 2 25 156 28 0 153 39 47 156 49 18 -1.39
155 24 12 -36 0 0 15 0 9.7 28 54 -43 154 11 35 156 34 59 153 49 19 156 55 58 -1.40
155 30 17 -35 0 0 15 0 2.1 29 54 -44 154 18 42 156 40 5 153 56 44 157 0 47 -1.40
155 34 28 -34 0 0 14 59 54.4 29 54 -45 154 23 49 156 43 23 154 2 9 157 3 50 -1.40
155 36 50 -33 0 0 14 59 46.5 30 55 -46 154 27 1 156 44 58 154 5 37 157 5 11 -1.40
155 37 28 -32 0 0 14 59 38.5 30 55 -46 154 28 24 156 44 52 154 7 14 157 4 53 -1.40
155 36 24 -31 0 0 14 59 30.3 31 56 -47 154 28 0 156 43 9 154 7 3 157 2 58 1.40
155 33 41 -30 0 0 14 59 22.0 31 56 -48 154 25 53 156 39 52 154 5 7 156 59 31 1.41
155 29 21 -29 0 0 14 59 13.6 32 57 -49 154 22 5 156 35 2 154 1 28 156 54 32 1.41
155 23 27 -28 0 0 14 59 5.0 32 58 -50 154 16 38 156 28 42 153 56 10 156 48 5 1.41
155 16 0 -27 0 0 14 58 56.3 33 58 -51 154 9 33 156 20 53 153 49 12 156 40 9 1.41
155 7 1 -26 0 0 14 58 47.5 33 59 -52 154 0 53 156 11 36 153 40 38 156 30 46 1.42
154 56 31 -25 0 0 14 58 38.6 33 60 -52 153 50 38 156 0 51 153 30 27 156 19 57 1.42
154 44 31 -24 0 0 14 58 29.5 34 61 -53 153 38 48 155 48 39 153 18 40 156 7 42 1.42
154 31 0 -23 0 0 14 58 20.3 34 61 -54 153 25 24 155 35 1 153 5 17 155 54 1 1.42
154 15 58 -22 0 0 14 58 11.0 34 62 -55 153 10 25 155 19 56 152 50 19 155 38 55 1.43
153 59 25 -21 0 0 14 58 1.6 34 63 -56 152 53 50 155 3 23 152 33 44 155 22 22 1.43
153 41 19 -20 0 0 14 57 52.1 35 64 -57 152 35 39 154 45 22 152 15 30 155 4 21 1.43
153 21 40 -19 0 0 14 57 42.5 35 65 -58 152 15 49 154 25 51 151 55 38 154 44 53 1.43
153 0 25 -18 0 0 14 57 32.7 35 65 -59 151 54 20 154 4 48 151 34 4 154 23 54 1.44
Use these links for further information:
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[Observing Details]
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