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Updated: 2023 Jun 27, 04:31 UT
Event Rank : 90
(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 21 UT, the 83 km diameter asteroid (676) Melitta will occult a 12.4 mag star in the constellation Serpens for observers along a path across western Queensland and eastern South Australia, passing over Mount Isa and near Mount Gambier.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 14.29 mag (the magnitude of the asteroid) for at most 12.0 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 UCAC4 390-085804 by 676 Melitta on 2023 Aug 21
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
138 46 8 -10 5 48 10 3 38.6 78 101 -20 138 23 11 -10 8 45 139 9 2 -10 2 48 137 59 14 -10 11 47 139 32 51 - 9 59 39 0.21
138 47 39 -10 25 14 10 3 43.8 78 99 -20 138 24 41 -10 28 12 139 10 35 -10 22 15 138 0 43 -10 31 15 139 34 25 -10 19 6 0.21
138 49 10 -10 44 41 10 3 49.1 78 98 -21 138 26 10 -10 47 38 139 12 7 -10 41 41 138 2 11 -10 50 41 139 35 59 -10 38 32 0.21
138 50 39 -11 4 7 10 3 54.3 78 97 -21 138 27 38 -11 7 5 139 13 38 -11 1 7 138 3 37 -11 10 8 139 37 31 -10 57 58 0.21
138 52 8 -11 23 33 10 3 59.6 78 95 -21 138 29 5 -11 26 31 139 15 8 -11 20 33 138 5 3 -11 29 35 139 39 3 -11 17 23 0.21
138 53 35 -11 42 59 10 4 4.8 78 94 -21 138 30 31 -11 45 57 139 16 37 -11 39 58 138 6 27 -11 49 1 139 40 33 -11 36 49 0.21
138 55 1 -12 2 25 10 4 10.0 78 92 -21 138 31 55 -12 5 23 139 18 4 -11 59 24 138 7 50 -12 8 27 139 42 2 -11 56 14 0.21
138 56 26 -12 21 50 10 4 15.3 78 91 -21 138 33 19 -12 24 49 139 19 31 -12 18 49 138 9 11 -12 27 53 139 43 31 -12 15 39 0.21
138 57 50 -12 41 16 10 4 20.5 78 89 -21 138 34 41 -12 44 15 139 20 57 -12 38 15 138 10 32 -12 47 19 139 44 58 -12 35 4 0.21
138 59 13 -13 0 41 10 4 25.8 78 87 -21 138 36 2 -13 3 41 139 22 22 -12 57 40 138 11 52 -13 6 45 139 46 25 -12 54 29 0.21
139 0 35 -13 20 7 10 4 31.0 78 86 -21 138 37 23 -13 23 6 139 23 46 -13 17 5 138 13 10 -13 26 11 139 47 50 -13 13 54 0.21
139 1 56 -13 39 32 10 4 36.3 78 84 -21 138 38 42 -13 42 32 139 25 9 -13 36 31 138 14 27 -13 45 37 139 49 15 -13 33 19 0.21
139 3 17 -13 58 58 10 4 41.5 78 83 -21 138 40 0 -14 1 58 139 26 31 -13 55 56 138 15 43 -14 5 4 139 50 39 -13 52 44 0.21
139 4 36 -14 18 24 10 4 46.8 78 81 -22 138 41 17 -14 21 24 139 27 52 -14 15 22 138 16 58 -14 24 30 139 52 2 -14 12 10 0.21
139 5 54 -14 37 50 10 4 52.0 78 80 -22 138 42 33 -14 40 51 139 29 12 -14 34 47 138 18 12 -14 43 56 139 53 25 -14 31 35 0.21
139 7 11 -14 57 16 10 4 57.2 78 78 -22 138 43 49 -15 0 17 139 30 31 -14 54 13 138 19 26 -15 3 23 139 54 46 -14 51 1 0.21
139 8 27 -15 16 43 10 5 2.5 78 77 -22 138 45 3 -15 19 44 139 31 50 -15 13 40 138 20 38 -15 22 50 139 56 7 -15 10 27 0.21
139 9 43 -15 36 9 10 5 7.7 78 75 -22 138 46 16 -15 39 11 139 33 7 -15 33 6 138 21 49 -15 42 17 139 57 26 -15 29 53 0.21
139 10 57 -15 55 36 10 5 13.0 78 73 -22 138 47 28 -15 58 38 139 34 24 -15 52 33 138 22 58 -16 1 45 139 58 45 -15 49 19 0.21
139 12 11 -16 15 4 10 5 18.2 78 72 -22 138 48 40 -16 18 6 139 35 40 -16 12 0 138 24 7 -16 21 13 140 0 3 -16 8 46 0.21
139 13 24 -16 34 32 10 5 23.5 78 70 -22 138 49 50 -16 37 34 139 36 54 -16 31 27 138 25 15 -16 40 41 140 1 21 -16 28 13 0.21
139 14 35 -16 54 0 10 5 28.7 78 69 -22 138 50 59 -16 57 2 139 38 9 -16 50 55 138 26 22 -17 0 10 140 2 37 -16 47 41 0.21
139 15 46 -17 13 28 10 5 34.0 78 67 -22 138 52 8 -17 16 31 139 39 22 -17 10 24 138 27 28 -17 19 39 140 3 53 -17 7 9 0.21
139 16 56 -17 32 58 10 5 39.2 78 66 -22 138 53 15 -17 36 1 139 40 34 -17 29 52 138 28 33 -17 39 9 140 5 8 -17 26 38 0.21
139 18 5 -17 52 27 10 5 44.4 78 65 -22 138 54 22 -17 55 31 139 41 46 -17 49 22 138 29 37 -17 58 40 140 6 23 -17 46 7 0.20
139 19 14 -18 11 58 10 5 49.7 77 63 -22 138 55 28 -18 15 1 139 42 57 -18 8 52 138 30 40 -18 18 10 140 7 36 -18 5 36 0.20
139 20 21 -18 31 29 10 5 54.9 77 62 -23 138 56 32 -18 34 33 139 44 7 -18 28 22 138 31 42 -18 37 42 140 8 49 -18 25 7 0.20
139 21 28 -18 51 0 10 6 0.2 77 60 -23 138 57 36 -18 54 4 139 45 16 -18 47 54 138 32 43 -18 57 14 140 10 1 -18 44 38 0.20
139 22 33 -19 10 32 10 6 5.4 77 59 -23 138 58 39 -19 13 37 139 46 25 -19 7 26 138 33 43 -19 16 47 140 11 12 -19 4 9 0.20
139 23 38 -19 30 5 10 6 10.7 77 58 -23 138 59 41 -19 33 10 139 47 33 -19 26 58 138 34 42 -19 36 21 140 12 23 -19 23 41 0.20
139 24 43 -19 49 39 10 6 15.9 77 57 -23 139 0 43 -19 52 44 139 48 40 -19 46 32 138 35 40 -19 55 55 140 13 33 -19 43 15 0.20
139 25 46 -20 9 14 10 6 21.2 77 55 -23 139 1 43 -20 12 19 139 49 46 -20 6 6 138 36 37 -20 15 31 140 14 42 -20 2 48 0.20
139 26 48 -20 28 49 10 6 26.4 76 54 -23 139 2 42 -20 31 55 139 50 51 -20 25 41 138 37 34 -20 35 7 140 15 51 -20 22 23 0.20
139 27 50 -20 48 26 10 6 31.6 76 53 -23 139 3 41 -20 51 32 139 51 56 -20 45 17 138 38 29 -20 54 44 140 16 59 -20 41 59 0.20
139 28 51 -21 8 3 10 6 36.9 76 52 -23 139 4 39 -21 11 10 139 53 0 -21 4 54 138 39 24 -21 14 22 140 18 6 -21 1 35 0.20
139 29 51 -21 27 41 10 6 42.1 76 51 -23 139 5 36 -21 30 48 139 54 4 -21 24 32 138 40 17 -21 34 1 140 19 13 -21 21 13 0.20
139 30 51 -21 47 20 10 6 47.4 76 49 -23 139 6 32 -21 50 28 139 55 6 -21 44 11 138 41 10 -21 53 41 140 20 19 -21 40 51 0.20
139 31 49 -22 7 1 10 6 52.6 76 48 -23 139 7 27 -22 10 8 139 56 8 -22 3 51 138 42 2 -22 13 22 140 21 24 -22 0 31 0.20
139 32 47 -22 26 42 10 6 57.9 75 47 -23 139 8 21 -22 29 50 139 57 9 -22 23 32 138 42 52 -22 33 4 140 22 29 -22 20 11 0.20
139 33 44 -22 46 25 10 7 3.1 75 46 -23 139 9 15 -22 49 33 139 58 10 -22 43 14 138 43 42 -22 52 47 140 23 33 -22 39 53 0.20
139 34 40 -23 6 8 10 7 8.4 75 45 -23 139 10 8 -23 9 17 139 59 10 -23 2 57 138 44 31 -23 12 32 140 24 37 -22 59 36 0.20
139 35 36 -23 25 53 10 7 13.6 75 44 -23 139 11 0 -23 29 3 140 0 9 -23 22 42 138 45 19 -23 32 18 140 25 40 -23 19 20 0.20
139 36 31 -23 45 40 10 7 18.8 75 43 -24 139 11 51 -23 48 49 140 1 7 -23 42 28 138 46 7 -23 52 5 140 26 42 -23 39 6 0.20
139 37 25 -24 5 27 10 7 24.1 74 43 -24 139 12 41 -24 8 37 140 2 5 -24 2 15 138 46 53 -24 11 53 140 27 44 -23 58 52 0.20
139 38 18 -24 25 16 10 7 29.3 74 42 -24 139 13 31 -24 28 27 140 3 2 -24 22 3 138 47 38 -24 31 43 140 28 45 -24 18 40 0.20
139 39 11 -24 45 6 10 7 34.6 74 41 -24 139 14 19 -24 48 17 140 3 59 -24 41 53 138 48 23 -24 51 34 140 29 45 -24 38 30 0.20
139 40 3 -25 4 58 10 7 39.8 74 40 -24 139 15 7 -25 8 10 140 4 55 -25 1 45 138 49 7 -25 11 27 140 30 45 -24 58 21 0.20
139 40 54 -25 24 51 10 7 45.1 73 39 -24 139 15 54 -25 28 3 140 5 50 -25 21 37 138 49 49 -25 31 21 140 31 45 -25 18 13 0.20
139 41 44 -25 44 46 10 7 50.3 73 38 -24 139 16 40 -25 47 59 140 6 45 -25 41 32 138 50 31 -25 51 17 140 32 44 -25 38 7 0.20
139 42 34 -26 4 43 10 7 55.6 73 38 -24 139 17 26 -26 7 55 140 7 39 -26 1 28 138 51 12 -26 11 14 140 33 42 -25 58 2 0.20
139 43 23 -26 24 41 10 8 0.8 73 37 -24 139 18 11 -26 27 54 140 8 32 -26 21 25 138 51 52 -26 31 13 140 34 40 -26 17 59 0.20
139 44 11 -26 44 40 10 8 6.0 72 36 -24 139 18 54 -26 47 54 140 9 24 -26 41 24 138 52 32 -26 51 13 140 35 37 -26 37 58 0.20
139 44 59 -27 4 42 10 8 11.3 72 35 -24 139 19 38 -27 7 56 140 10 16 -27 1 25 138 53 10 -27 11 16 140 36 33 -26 57 59 0.20
139 45 46 -27 24 45 10 8 16.5 72 35 -24 139 20 20 -27 28 0 140 11 8 -27 21 28 138 53 47 -27 31 20 140 37 30 -27 18 1 0.20
139 46 32 -27 44 50 10 8 21.8 72 34 -24 139 21 1 -27 48 5 140 11 59 -27 41 33 138 54 24 -27 51 26 140 38 25 -27 38 5 0.19
139 47 17 -28 4 57 10 8 27.0 71 33 -24 139 21 42 -28 8 12 140 12 49 -28 1 39 138 55 0 -28 11 34 140 39 20 -27 58 11 0.19
139 48 2 -28 25 6 10 8 32.3 71 33 -24 139 22 22 -28 28 22 140 13 38 -28 21 47 138 55 35 -28 31 44 140 40 15 -28 18 18 0.19
139 48 46 -28 45 16 10 8 37.5 71 32 -24 139 23 1 -28 48 33 140 14 27 -28 41 58 138 56 8 -28 51 55 140 41 9 -28 38 28 0.19
139 49 29 -29 5 29 10 8 42.8 71 32 -24 139 23 39 -29 8 46 140 15 16 -29 2 10 138 56 41 -29 12 9 140 42 2 -28 58 40 0.19
139 50 12 -29 25 44 10 8 48.0 70 31 -24 139 24 17 -29 29 2 140 16 3 -29 22 24 138 57 13 -29 32 25 140 42 55 -29 18 54 0.19
139 50 54 -29 46 1 10 8 53.2 70 30 -24 139 24 53 -29 49 19 140 16 51 -29 42 41 138 57 45 -29 52 43 140 43 48 -29 39 10 0.19
139 51 35 -30 6 20 10 8 58.5 70 30 -24 139 25 29 -30 9 39 140 17 37 -30 2 59 138 58 15 -30 13 4 140 44 40 -29 59 28 0.19
139 52 15 -30 26 42 10 9 3.7 69 29 -24 139 26 4 -30 30 1 140 18 23 -30 23 20 138 58 44 -30 33 26 140 45 31 -30 19 48 0.19
139 52 55 -30 47 5 10 9 9.0 69 29 -24 139 26 39 -30 50 25 140 19 8 -30 43 43 138 59 13 -30 53 51 140 46 22 -30 40 10 0.19
139 53 34 -31 7 32 10 9 14.2 69 28 -24 139 27 12 -31 10 52 140 19 53 -31 4 9 138 59 40 -31 14 18 140 47 13 -31 0 35 0.19
139 54 13 -31 28 0 10 9 19.5 69 28 -24 139 27 45 -31 31 21 140 20 37 -31 24 37 139 0 7 -31 34 48 140 48 3 -31 21 3 0.19
139 54 51 -31 48 31 10 9 24.7 68 27 -24 139 28 16 -31 51 53 140 21 21 -31 45 7 139 0 32 -31 55 20 140 48 52 -31 41 32 0.19
139 55 27 -32 9 5 10 9 30.0 68 27 -24 139 28 47 -32 12 27 140 22 4 -32 5 40 139 0 57 -32 15 55 140 49 42 -32 2 5 0.19
139 56 4 -32 29 41 10 9 35.2 68 26 -25 139 29 18 -32 33 3 140 22 46 -32 26 16 139 1 21 -32 36 32 140 50 30 -32 22 39 0.19
139 56 39 -32 50 19 10 9 40.5 67 26 -25 139 29 47 -32 53 43 140 23 28 -32 46 54 139 1 44 -32 57 12 140 51 18 -32 43 17 0.19
139 57 14 -33 11 1 10 9 45.7 67 25 -25 139 30 15 -33 14 25 140 24 9 -33 7 34 139 2 5 -33 17 55 140 52 6 -33 3 57 0.19
139 57 48 -33 31 45 10 9 50.9 67 25 -25 139 30 43 -33 35 10 140 24 49 -33 28 18 139 2 26 -33 38 40 140 52 53 -33 24 40 0.19
139 58 22 -33 52 32 10 9 56.2 67 25 -25 139 31 10 -33 55 58 140 25 29 -33 49 5 139 2 46 -33 59 29 140 53 40 -33 45 26 0.19
139 58 54 -34 13 22 10 10 1.4 66 24 -25 139 31 36 -34 16 48 140 26 9 -34 9 54 139 3 5 -34 20 20 140 54 26 -34 6 14 0.19
139 59 26 -34 34 15 10 10 6.7 66 24 -25 139 32 1 -34 37 42 140 26 48 -34 30 46 139 3 23 -34 41 14 140 55 12 -34 27 6 0.19
139 59 57 -34 55 11 10 10 11.9 66 23 -25 139 32 25 -34 58 39 140 27 26 -34 51 41 139 3 40 -35 2 12 140 55 57 -34 48 0 0.19
140 0 28 -35 16 10 10 10 17.2 65 23 -25 139 32 48 -35 19 38 140 28 3 -35 12 40 139 3 55 -35 23 12 140 56 42 -35 8 58 0.19
140 0 58 -35 37 13 10 10 22.4 65 23 -25 139 33 11 -35 40 41 140 28 40 -35 33 41 139 4 10 -35 44 16 140 57 27 -35 29 59 0.19
140 1 27 -35 58 18 10 10 27.7 65 22 -25 139 33 32 -36 1 48 140 29 17 -35 54 46 139 4 24 -36 5 23 140 58 11 -35 51 3 0.19
140 1 55 -36 19 27 10 10 32.9 64 22 -25 139 33 53 -36 22 57 140 29 52 -36 15 54 139 4 36 -36 26 33 140 58 54 -36 12 10 0.19
140 2 22 -36 40 39 10 10 38.1 64 22 -25 139 34 12 -36 44 10 140 30 27 -36 37 6 139 4 48 -36 47 47 140 59 37 -36 33 21 0.19
140 2 49 -37 1 55 10 10 43.4 64 21 -25 139 34 31 -37 5 27 140 31 2 -36 58 21 139 4 58 -37 9 4 141 0 20 -36 54 35 0.19
140 3 15 -37 23 14 10 10 48.6 63 21 -25 139 34 49 -37 26 47 140 31 36 -37 19 40 139 5 7 -37 30 25 141 1 2 -37 15 53 0.19
140 3 40 -37 44 37 10 10 53.9 63 21 -25 139 35 5 -37 48 11 140 32 9 -37 41 2 139 5 15 -37 51 50 141 1 44 -37 37 14 0.19
140 4 4 -38 6 4 10 10 59.1 63 20 -25 139 35 21 -38 9 38 140 32 41 -38 2 28 139 5 22 -38 13 18 141 2 25 -37 58 40 0.19
140 4 27 -38 27 35 10 11 4.4 62 20 -25 139 35 36 -38 31 9 140 33 13 -38 23 57 139 5 28 -38 34 50 141 3 6 -38 20 8 0.19
140 4 50 -38 49 9 10 11 9.6 62 20 -25 139 35 50 -38 52 45 140 33 45 -38 45 31 139 5 33 -38 56 26 141 3 46 -38 41 41 0.19
140 5 11 -39 10 47 10 11 14.9 62 20 -25 139 36 2 -39 14 24 140 34 15 -39 7 8 139 5 36 -39 18 6 141 4 26 -39 3 18 0.19
140 5 32 -39 32 30 10 11 20.1 61 19 -25 139 36 14 -39 36 7 140 34 45 -39 28 50 139 5 38 -39 39 51 141 5 5 -39 24 58 0.19
140 5 52 -39 54 17 10 11 25.3 61 19 -25 139 36 25 -39 57 55 140 35 15 -39 50 36 139 5 39 -40 1 39 141 5 44 -39 46 43 0.19
140 6 11 -40 16 7 10 11 30.6 61 19 -25 139 36 34 -40 19 46 140 35 43 -40 12 26 139 5 38 -40 23 31 141 6 22 -40 8 32 0.19
140 6 29 -40 38 3 10 11 35.8 60 19 -25 139 36 43 -40 41 43 140 36 11 -40 34 20 139 5 36 -40 45 29 141 7 0 -40 30 25 0.19
140 6 47 -41 0 2 10 11 41.1 60 18 -25 139 36 50 -41 3 43 140 36 38 -40 56 19 139 5 33 -41 7 30 141 7 38 -40 52 23 0.19
140 7 3 -41 22 7 10 11 46.3 60 18 -25 139 36 56 -41 25 48 140 37 5 -41 18 22 139 5 28 -41 29 36 141 8 15 -41 14 26 0.19
140 7 18 -41 44 15 10 11 51.6 59 18 -25 139 37 1 -41 47 58 140 37 30 -41 40 30 139 5 22 -41 51 47 141 8 51 -41 36 32 0.19
140 7 33 -42 6 29 10 11 56.8 59 18 -25 139 37 4 -42 10 13 140 37 55 -42 2 43 139 5 14 -42 14 2 141 9 27 -41 58 44 0.19
140 7 46 -42 28 48 10 12 2.1 59 17 -25 139 37 7 -42 32 32 140 38 20 -42 25 0 139 5 5 -42 36 23 141 10 2 -42 21 0 0.19
140 7 58 -42 51 11 10 12 7.3 58 17 -25 139 37 8 -42 54 57 140 38 43 -42 47 23 139 4 54 -42 58 48 141 10 37 -42 43 22 0.18
140 8 10 -43 13 40 10 12 12.5 58 17 -25 139 37 7 -43 17 26 140 39 6 -43 9 50 139 4 42 -43 21 19 141 11 12 -43 5 48 0.18
140 8 20 -43 36 13 10 12 17.8 58 17 -24 139 37 6 -43 40 1 140 39 27 -43 32 23 139 4 28 -43 43 55 141 11 46 -43 28 20 0.18
140 8 29 -43 58 53 10 12 23.0 57 16 -24 139 37 3 -44 2 41 140 39 48 -43 55 1 139 4 12 -44 6 36 141 12 19 -43 50 57 0.18
140 8 37 -44 21 37 10 12 28.3 57 16 -24 139 36 58 -44 25 27 140 40 9 -44 17 45 139 3 55 -44 29 23 141 12 52 -44 13 39 0.18
140 8 43 -44 44 27 10 12 33.5 57 16 -24 139 36 53 -44 48 18 140 40 28 -44 40 34 139 3 36 -44 52 15 141 13 24 -44 36 27 0.18
140 8 49 -45 7 23 10 12 38.8 56 16 -24 139 36 45 -45 11 15 140 40 46 -45 3 28 139 3 15 -45 15 13 141 13 55 -44 59 21 0.18
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