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Updated: 2020 Mar 14, 22:53 UT
Event Rank : 77
(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 2020 Apr 22 UT, the 35 km diameter asteroid (670) Ottegebe will occult a 8.0 mag star in the constellation Serpens for observers along a slightly uncertain path across eastern West Australia, running from Point Culver to Broome.
In the case of an occultation, the combined light of the asteroid and the star will drop by 6.41 mag to 14.41 mag (the magnitude of the asteroid) for at most 9.3 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, 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 5672-1126-1 by 670 Ottegebe on 2020 Apr 22
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 ' "
124 34 15 -44 24 12 16 55 1.6 47 56 -54 124 16 19 -44 25 45 124 52 7 -44 22 37 123 55 26 -44 27 32 125 12 45 -44 20 45 -0.71
124 37 12 -44 1 28 16 55 10.8 47 56 -55 124 19 25 -44 3 2 124 54 56 -43 59 53 123 58 42 -44 4 49 125 15 24 -43 58 1 -0.71
124 39 56 -43 38 49 16 55 20.0 48 56 -55 124 22 17 -43 40 23 124 57 31 -43 37 14 124 1 44 -43 42 10 125 17 50 -43 35 22 -0.71
124 42 27 -43 16 14 16 55 29.1 48 56 -55 124 24 56 -43 17 48 124 59 54 -43 14 39 124 4 32 -43 19 35 125 20 3 -43 12 47 -0.71
124 44 44 -42 53 44 16 55 38.3 48 57 -55 124 27 22 -42 55 17 125 2 4 -42 52 8 124 7 7 -42 57 5 125 22 4 -42 50 17 -0.71
124 46 50 -42 31 17 16 55 47.4 48 57 -56 124 29 35 -42 32 51 125 4 1 -42 29 42 124 9 29 -42 34 39 125 23 53 -42 27 50 -0.71
124 48 43 -42 8 55 16 55 56.6 49 57 -56 124 31 35 -42 10 29 125 5 47 -42 7 20 124 11 39 -42 12 16 125 25 30 -42 5 28 -0.71
124 50 25 -41 46 37 16 56 5.7 49 58 -56 124 33 24 -41 48 11 125 7 21 -41 45 1 124 13 36 -41 49 58 125 26 56 -41 43 10 -0.71
124 51 55 -41 24 22 16 56 14.9 49 58 -57 124 35 2 -41 25 56 125 8 45 -41 22 47 124 15 22 -41 27 44 125 28 11 -41 20 55 -0.71
124 53 14 -41 2 12 16 56 24.0 49 58 -57 124 36 28 -41 3 46 125 9 57 -41 0 37 124 16 57 -41 5 33 125 29 16 -40 58 45 -0.71
124 54 23 -40 40 5 16 56 33.2 50 58 -57 124 37 43 -40 41 39 125 10 59 -40 38 30 124 18 20 -40 43 26 125 30 10 -40 36 38 -0.71
124 55 21 -40 18 2 16 56 42.4 50 59 -57 124 38 48 -40 19 36 125 11 50 -40 16 27 124 19 32 -40 21 23 125 30 54 -40 14 35 -0.71
124 56 9 -39 56 2 16 56 51.5 50 59 -58 124 39 43 -39 57 36 125 12 32 -39 54 27 124 20 34 -39 59 24 125 31 28 -39 52 36 -0.71
124 56 47 -39 34 6 16 57 0.7 50 59 -58 124 40 27 -39 35 40 125 13 4 -39 32 31 124 21 26 -39 37 28 125 31 53 -39 30 40 -0.70
124 57 16 -39 12 14 16 57 9.8 51 60 -58 124 41 2 -39 13 48 125 13 26 -39 10 39 124 22 8 -39 15 35 125 32 8 -39 8 48 -0.70
124 57 35 -38 50 25 16 57 19.0 51 60 -58 124 41 27 -38 51 58 125 13 40 -38 48 50 124 22 40 -38 53 46 125 32 14 -38 46 59 -0.70
124 57 45 -38 28 39 16 57 28.1 51 60 -59 124 41 43 -38 30 13 125 13 44 -38 27 4 124 23 3 -38 32 0 125 32 12 -38 25 13 -0.70
124 57 46 -38 6 56 16 57 37.3 51 61 -59 124 41 50 -38 8 30 125 13 39 -38 5 22 124 23 17 -38 10 17 125 32 1 -38 3 30 -0.70
124 57 39 -37 45 17 16 57 46.5 51 61 -59 124 41 48 -37 46 50 125 13 26 -37 43 42 124 23 21 -37 48 37 125 31 42 -37 41 51 0.70
124 57 23 -37 23 40 16 57 55.6 52 61 -59 124 41 37 -37 25 14 125 13 5 -37 22 6 124 23 17 -37 27 1 125 31 14 -37 20 15 0.70
124 56 59 -37 2 7 16 58 4.8 52 62 -60 124 41 18 -37 3 40 125 12 36 -37 0 33 124 23 4 -37 5 27 125 30 39 -36 58 42 0.70
124 56 26 -36 40 36 16 58 13.9 52 62 -60 124 40 51 -36 42 10 125 11 58 -36 39 2 124 22 43 -36 43 57 125 29 55 -36 37 12 0.70
124 55 46 -36 19 9 16 58 23.1 52 63 -60 124 40 16 -36 20 42 125 11 13 -36 17 35 124 22 14 -36 22 29 125 29 4 -36 15 44 0.70
124 54 58 -35 57 44 16 58 32.2 52 63 -60 124 39 33 -35 59 17 125 10 20 -35 56 10 124 21 37 -36 1 4 125 28 6 -35 54 20 0.70
124 54 3 -35 36 22 16 58 41.4 52 63 -61 124 38 43 -35 37 55 125 9 20 -35 34 48 124 20 52 -35 39 42 125 27 0 -35 32 58 0.70
124 53 0 -35 15 3 16 58 50.6 53 64 -61 124 37 45 -35 16 36 125 8 12 -35 13 29 124 19 59 -35 18 22 125 25 47 -35 11 39 0.70
124 51 50 -34 53 46 16 58 59.7 53 64 -61 124 36 39 -34 55 19 125 6 58 -34 52 12 124 18 59 -34 57 5 125 24 27 -34 50 22 0.70
124 50 33 -34 32 32 16 59 8.9 53 65 -61 124 35 26 -34 34 5 125 5 36 -34 30 58 124 17 52 -34 35 51 125 23 0 -34 29 8 0.70
124 49 8 -34 11 20 16 59 18.0 53 65 -62 124 34 7 -34 12 53 125 4 7 -34 9 47 124 16 37 -34 14 39 125 21 26 -34 7 57 0.69
124 47 37 -33 50 11 16 59 27.2 53 65 -62 124 32 40 -33 51 43 125 2 32 -33 48 37 124 15 16 -33 53 29 125 19 46 -33 46 48 0.69
124 46 0 -33 29 4 16 59 36.3 53 66 -62 124 31 7 -33 30 36 125 0 50 -33 27 31 124 13 47 -33 32 22 125 18 0 -33 25 41 0.69
124 44 16 -33 7 59 16 59 45.5 54 66 -62 124 29 27 -33 9 32 124 59 2 -33 6 26 124 12 12 -33 11 17 125 16 7 -33 4 37 0.69
124 42 25 -32 46 57 16 59 54.7 54 67 -63 124 27 40 -32 48 29 124 57 7 -32 45 24 124 10 30 -32 50 15 125 14 7 -32 43 35 0.69
124 40 28 -32 25 57 17 0 3.8 54 67 -63 124 25 47 -32 27 29 124 55 6 -32 24 24 124 8 42 -32 29 14 125 12 2 -32 22 35 0.69
124 38 25 -32 4 59 17 0 13.0 54 68 -63 124 23 47 -32 6 31 124 52 59 -32 3 26 124 6 47 -32 8 16 125 9 50 -32 1 37 0.69
124 36 15 -31 44 3 17 0 22.1 54 68 -63 124 21 42 -31 45 35 124 50 46 -31 42 30 124 4 46 -31 47 20 125 7 33 -31 40 42 0.69
124 34 0 -31 23 9 17 0 31.3 54 68 -64 124 19 30 -31 24 41 124 48 27 -31 21 36 124 2 38 -31 26 26 125 5 10 -31 19 48 0.69
124 31 39 -31 2 17 17 0 40.4 54 69 -64 124 17 13 -31 3 48 124 46 2 -31 0 45 124 0 25 -31 5 33 125 2 41 -30 58 56 0.69
124 29 12 -30 41 27 17 0 49.6 55 69 -64 124 14 49 -30 42 58 124 43 32 -30 39 55 123 58 5 -30 44 43 125 0 6 -30 38 7 0.69
124 26 39 -30 20 39 17 0 58.7 55 70 -64 124 12 20 -30 22 10 124 40 55 -30 19 7 123 55 40 -30 23 55 124 57 26 -30 17 19 0.69
124 24 0 -29 59 52 17 1 7.9 55 70 -64 124 9 44 -30 1 23 124 38 14 -29 58 20 123 53 9 -30 3 8 124 54 40 -29 56 33 0.69
124 21 16 -29 39 8 17 1 17.1 55 71 -65 124 7 4 -29 40 39 124 35 26 -29 37 36 123 50 32 -29 42 23 124 51 49 -29 35 48 0.69
124 18 27 -29 18 25 17 1 26.2 55 71 -65 124 4 17 -29 19 56 124 32 33 -29 16 53 123 47 49 -29 21 40 124 48 52 -29 15 6 0.68
124 15 31 -28 57 43 17 1 35.4 55 72 -65 124 1 25 -28 59 14 124 29 35 -28 56 12 123 45 1 -29 0 58 124 45 51 -28 54 25 0.68
124 12 31 -28 37 4 17 1 44.5 55 72 -65 123 58 28 -28 38 34 124 26 32 -28 35 32 123 42 7 -28 40 18 124 42 44 -28 33 45 0.68
124 9 25 -28 16 26 17 1 53.7 55 73 -66 123 55 25 -28 17 56 124 23 23 -28 14 54 123 39 8 -28 19 39 124 39 32 -28 13 8 0.68
124 6 15 -27 55 49 17 2 2.8 55 73 -66 123 52 17 -27 57 19 124 20 9 -27 54 18 123 36 4 -27 59 2 124 36 14 -27 52 31 0.68
124 2 58 -27 35 14 17 2 12.0 55 74 -66 123 49 4 -27 36 44 124 16 50 -27 33 43 123 32 54 -27 38 27 124 32 52 -27 31 56 0.68
123 59 37 -27 14 40 17 2 21.2 56 74 -66 123 45 46 -27 16 10 124 13 26 -27 13 9 123 29 39 -27 17 53 124 29 25 -27 11 23 0.68
123 56 11 -26 54 7 17 2 30.3 56 75 -66 123 42 22 -26 55 37 124 9 57 -26 52 37 123 26 18 -26 57 20 124 25 53 -26 50 51 0.68
123 52 40 -26 33 36 17 2 39.5 56 75 -67 123 38 54 -26 35 5 124 6 23 -26 32 6 123 22 53 -26 36 48 124 22 16 -26 30 20 0.68
123 49 4 -26 13 6 17 2 48.6 56 76 -67 123 35 20 -26 14 35 124 2 45 -26 11 36 123 19 22 -26 16 18 124 18 34 -26 9 50 0.68
123 45 23 -25 52 37 17 2 57.8 56 76 -67 123 31 42 -25 54 6 123 59 1 -25 51 7 123 15 47 -25 55 49 124 14 47 -25 49 22 0.68
123 41 37 -25 32 9 17 3 6.9 56 77 -67 123 27 58 -25 33 38 123 55 13 -25 30 40 123 12 6 -25 35 21 124 10 56 -25 28 54 0.68
123 37 46 -25 11 43 17 3 16.1 56 77 -67 123 24 10 -25 13 12 123 51 19 -25 10 13 123 8 21 -25 14 54 124 7 0 -25 8 28 0.67
123 33 50 -24 51 17 17 3 25.3 56 78 -68 123 20 17 -24 52 46 123 47 22 -24 49 48 123 4 31 -24 54 28 124 3 0 -24 48 3 0.67
123 29 50 -24 30 53 17 3 34.4 56 78 -68 123 16 19 -24 32 21 123 43 19 -24 29 24 123 0 35 -24 34 3 123 58 54 -24 27 39 0.67
123 25 45 -24 10 29 17 3 43.6 56 79 -68 123 12 16 -24 11 58 123 39 12 -24 9 0 122 56 35 -24 13 39 123 54 44 -24 7 16 0.67
123 21 35 -23 50 7 17 3 52.7 56 79 -68 123 8 9 -23 51 35 123 35 0 -23 48 38 122 52 30 -23 53 16 123 50 30 -23 46 53 0.67
123 17 21 -23 29 45 17 4 1.9 56 80 -68 123 3 57 -23 31 13 123 30 43 -23 28 16 122 48 21 -23 32 54 123 46 11 -23 26 32 0.67
123 13 2 -23 9 24 17 4 11.0 56 80 -68 122 59 40 -23 10 52 123 26 22 -23 7 55 122 44 7 -23 12 32 123 41 48 -23 6 11 0.67
123 8 39 -22 49 4 17 4 20.2 56 81 -69 122 55 18 -22 50 31 123 21 57 -22 47 35 122 39 47 -22 52 12 123 37 20 -22 45 52 0.67
123 4 11 -22 28 44 17 4 29.3 56 81 -69 122 50 52 -22 30 12 123 17 27 -22 27 16 122 35 24 -22 31 52 123 32 48 -22 25 33 0.67
122 59 38 -22 8 25 17 4 38.5 56 82 -69 122 46 22 -22 9 53 123 12 52 -22 6 57 122 30 55 -22 11 33 123 28 11 -22 5 14 0.67
122 55 1 -21 48 7 17 4 47.7 56 82 -69 122 41 47 -21 49 34 123 8 13 -21 46 39 122 26 23 -21 51 14 123 23 30 -21 44 56 0.67
122 50 20 -21 27 50 17 4 56.8 56 83 -69 122 37 7 -21 29 16 123 3 30 -21 26 22 122 21 45 -21 30 56 123 18 44 -21 24 39 0.66
122 45 34 -21 7 33 17 5 6.0 56 83 -70 122 32 23 -21 8 59 122 58 42 -21 6 5 122 17 3 -21 10 39 123 13 54 -21 4 23 0.66
122 40 43 -20 47 16 17 5 15.1 56 84 -70 122 27 34 -20 48 43 122 53 50 -20 45 49 122 12 16 -20 50 22 123 9 0 -20 44 6 0.66
122 35 48 -20 27 0 17 5 24.3 56 84 -70 122 22 41 -20 28 26 122 48 53 -20 25 33 122 7 25 -20 30 5 123 4 1 -20 23 51 0.66
122 30 49 -20 6 44 17 5 33.4 56 85 -70 122 17 43 -20 8 10 122 43 52 -20 5 17 122 2 29 -20 9 49 122 58 58 -20 3 35 0.66
122 25 45 -19 46 29 17 5 42.6 56 85 -70 122 12 41 -19 47 55 122 38 47 -19 45 2 121 57 29 -19 49 33 122 53 51 -19 43 20 0.66
122 20 37 -19 26 14 17 5 51.8 56 86 -70 122 7 34 -19 27 40 122 33 37 -19 24 47 121 52 24 -19 29 18 122 48 40 -19 23 6 0.66
122 15 24 -19 5 59 17 6 0.9 56 86 -70 122 2 23 -19 7 25 122 28 23 -19 4 33 121 47 14 -19 9 3 122 43 24 -19 2 52 0.66
122 10 7 -18 45 45 17 6 10.1 56 87 -71 121 57 7 -18 47 10 122 23 4 -18 44 18 121 42 1 -18 48 48 122 38 3 -18 42 37 0.66
122 4 45 -18 25 30 17 6 19.2 56 87 -71 121 51 47 -18 26 55 122 17 42 -18 24 4 121 36 42 -18 28 33 122 32 39 -18 22 23 0.66
121 59 20 -18 5 16 17 6 28.4 56 88 -71 121 46 23 -18 6 41 122 12 14 -18 3 50 121 31 19 -18 8 18 122 27 10 -18 2 10 0.66
121 53 49 -17 45 2 17 6 37.5 56 89 -71 121 40 54 -17 46 27 122 6 43 -17 43 36 121 25 52 -17 48 4 122 21 37 -17 41 56 0.65
121 48 15 -17 24 48 17 6 46.7 56 89 -71 121 35 20 -17 26 12 122 1 7 -17 23 22 121 20 20 -17 27 49 122 15 59 -17 21 42 0.65
121 42 36 -17 4 34 17 6 55.9 56 90 -71 121 29 43 -17 5 58 121 55 26 -17 3 8 121 14 44 -17 7 35 122 10 18 -17 1 29 0.65
121 36 52 -16 44 20 17 7 5.0 56 90 -71 121 24 0 -16 45 44 121 49 42 -16 42 55 121 9 3 -16 47 20 122 4 32 -16 41 15 0.65
121 31 4 -16 24 5 17 7 14.2 56 91 -71 121 18 14 -16 25 29 121 43 53 -16 22 41 121 3 17 -16 27 6 121 58 41 -16 21 1 0.65
121 25 12 -16 3 51 17 7 23.3 56 91 -72 121 12 22 -16 5 15 121 37 59 -16 2 26 120 57 27 -16 6 51 121 52 46 -16 0 47 0.65
121 19 15 -15 43 36 17 7 32.5 56 92 -72 121 6 26 -15 45 0 121 32 1 -15 42 12 120 51 33 -15 46 36 121 46 47 -15 40 33 0.65
121 13 14 -15 23 22 17 7 41.6 56 92 -72 121 0 26 -15 24 45 121 25 59 -15 21 58 120 45 34 -15 26 21 121 40 44 -15 20 19 0.65
121 7 8 -15 3 7 17 7 50.8 56 93 -72 120 54 21 -15 4 30 121 19 52 -15 1 43 120 39 30 -15 6 5 121 34 36 -15 0 4 0.65
121 0 58 -14 42 51 17 8 0.0 56 93 -72 120 48 12 -14 44 14 121 13 41 -14 41 28 120 33 22 -14 45 49 121 28 24 -14 39 49 0.65
120 54 43 -14 22 36 17 8 9.1 55 94 -72 120 41 58 -14 23 58 121 7 25 -14 21 12 120 27 9 -14 25 33 121 22 7 -14 19 34 0.65
120 48 24 -14 2 19 17 8 18.3 55 94 -72 120 35 40 -14 3 42 121 1 5 -14 0 56 120 20 52 -14 5 16 121 15 46 -13 59 19 0.64
120 42 0 -13 42 3 17 8 27.4 55 95 -72 120 29 17 -13 43 25 120 54 40 -13 40 40 120 14 30 -13 44 59 121 9 20 -13 39 2 0.64
120 35 31 -13 21 46 17 8 36.6 55 95 -72 120 22 49 -13 23 8 120 48 11 -13 20 23 120 8 3 -13 24 42 121 2 50 -13 18 46 0.64
120 28 58 -13 1 28 17 8 45.7 55 96 -72 120 16 17 -13 2 50 120 41 38 -13 0 5 120 1 31 -13 4 24 120 56 16 -12 58 29 0.64
120 22 21 -12 41 10 17 8 54.9 55 96 -72 120 9 40 -12 42 31 120 34 59 -12 39 47 119 54 55 -12 44 5 120 49 36 -12 38 11 0.64
120 15 38 -12 20 51 17 9 4.0 55 97 -72 120 2 58 -12 22 12 120 28 16 -12 19 29 119 48 14 -12 23 45 120 42 53 -12 17 53 0.64
120 8 51 -12 0 31 17 9 13.2 55 97 -73 119 56 12 -12 1 52 120 21 29 -11 59 9 119 41 29 -12 3 25 120 36 4 -11 57 33 0.64
120 2 0 -11 40 11 17 9 22.4 55 97 -73 119 49 21 -11 41 32 120 14 36 -11 38 49 119 34 38 -11 43 4 120 29 12 -11 37 14 0.64
Uncertainty in time = +/- 6 secs
Prediction of 2020 Mar 14.0
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