|
|
Updated: 2023 Oct 15, 21:12 UT
Event Rank : 92
(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 Dec 02 UT, the 107 km diameter asteroid (1583) Antilochus will occult a 11.8 mag star in the constellation Hydra for observers along a path across north-western West Australia, passing near Port Hedland and over Jurien.
In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 16.14 mag (the magnitude of the asteroid) for at most 7.8 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 5455-01746-1 by 1583 Antilochus on 2023 Dec 2
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
123 11 28 -10 0 0 18 33 18.2 70 106 -36 122 39 1 123 43 48 122 6 44 124 15 43 -0.36
122 54 11 -11 0 0 18 33 26.5 70 103 -36 122 21 33 123 26 40 121 49 7 123 58 45 -0.36
122 36 21 -12 0 0 18 33 34.9 70 100 -35 122 3 33 123 9 2 121 30 56 123 41 16 -0.36
122 17 59 -13 0 0 18 33 43.3 70 97 -35 121 45 0 122 50 51 121 12 11 123 23 16 -0.36
121 59 3 -14 0 0 18 33 51.7 70 95 -35 121 25 51 122 32 7 120 52 49 123 4 45 -0.36
121 39 32 -15 0 0 18 34 0.0 70 92 -34 121 6 7 122 12 49 120 32 51 122 45 39 -0.36
121 19 24 -16 0 0 18 34 8.4 69 89 -34 120 45 44 121 52 55 120 12 15 122 25 59 -0.36
120 58 39 -17 0 0 18 34 16.8 69 87 -33 120 24 43 121 32 25 119 50 58 122 5 43 -0.36
120 37 13 -18 0 0 18 34 25.2 69 84 -33 120 3 2 121 11 16 119 29 0 121 44 50 -0.35
120 15 7 -19 0 0 18 34 33.6 68 82 -32 119 40 38 120 49 27 119 6 19 121 23 18 -0.35
119 52 18 -20 0 0 18 34 42.0 68 80 -32 119 17 30 120 26 56 118 42 52 121 1 5 -0.35
119 28 44 -21 0 0 18 34 50.4 67 78 -31 118 53 37 120 3 42 118 18 38 120 38 10 -0.35
119 4 24 -22 0 0 18 34 58.8 67 76 -31 118 28 55 119 39 42 117 53 35 120 14 30 -0.35
118 39 14 -23 0 0 18 35 7.2 66 74 -31 118 3 23 119 14 54 117 27 41 119 50 4 -0.35
118 13 13 -24 0 0 18 35 15.6 65 72 -30 117 36 58 118 49 17 117 0 52 119 24 49 -0.35
117 46 18 -25 0 0 18 35 23.9 65 71 -30 117 9 38 118 22 47 116 33 6 118 58 44 -0.35
117 18 27 -26 0 0 18 35 32.2 64 69 -29 116 41 20 117 55 22 116 4 21 118 31 45 -0.35
116 49 36 -27 0 0 18 35 40.6 63 68 -29 116 12 0 117 26 59 115 34 32 118 3 49 -0.35
116 19 42 -28 0 0 18 35 48.9 63 66 -28 115 41 36 116 57 35 115 3 37 117 34 54 -0.35
115 48 42 -29 0 0 18 35 57.1 62 65 -28 115 10 3 116 27 7 114 31 31 117 4 56 -0.35
115 16 32 -30 0 0 18 36 5.4 61 64 -27 114 37 18 115 55 30 113 58 12 116 33 52 -0.35
114 43 7 -31 0 0 18 36 13.6 60 63 -27 114 3 17 115 22 41 113 23 33 116 1 38 -0.35
114 8 23 -32 0 0 18 36 21.8 59 62 -26 113 27 54 114 48 36 112 47 30 115 28 10 -0.35
113 32 15 -33 0 0 18 36 30.0 58 62 -26 112 51 4 114 13 9 112 9 59 114 53 22 -0.35
112 54 38 -34 0 0 18 36 38.2 57 61 -25 112 12 43 113 36 15 111 30 52 114 17 11 -0.35
112 15 26 -35 0 0 18 36 46.3 56 60 -25 111 32 43 112 57 49 110 50 3 113 39 30 -0.35
111 34 31 -36 0 0 18 36 54.4 55 60 -24 110 50 57 112 17 44 110 7 26 113 0 13 -0.35
110 51 48 -37 0 0 18 37 2.4 54 59 -24 110 7 19 111 35 54 109 22 52 112 19 14 -0.35
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]