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Updated: 2021 OCT 21, 16:55 UT
Event Rank : 91
(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 2021 Nov 20 UT, the 58.8 km diameter asteroid (207) Hedda will occult a 11.1 mag star in the constellation Gemini for observers along a path across Australia, from western South Australia across eastern Western Australia to near Derby.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.86 mag to 13.87 mag (the magnitude of the asteroid) for at most 21.280 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, inparticular 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 1904-01006-1 by 207 Hedda on 2021 Nov 20
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
135 53 6 -42 40 47 18 10 55.6 20 0 -11 135 35 2 -43 7 29 136 10 54 -42 14 44 135 16 32 -43 35 6 136 28 36 -41 49 4 0.74
135 34 26 -41 52 43 18 11 9.4 21 1 -12 135 16 31 -42 18 29 135 52 6 -41 27 32 134 58 10 -42 45 7 136 9 42 -41 2 40 0.74
135 16 6 -41 6 24 18 11 23.1 22 1 -13 134 58 20 -41 31 21 135 33 39 -40 41 59 134 40 8 -41 57 6 135 51 8 -40 17 51 0.74
134 58 5 -40 21 40 18 11 36.9 23 1 -13 134 40 26 -40 45 53 135 15 31 -39 57 56 134 22 23 -41 10 50 135 32 53 -39 34 27 0.75
134 40 20 -39 38 20 18 11 50.7 23 1 -14 134 22 49 -40 1 54 134 57 39 -39 15 13 134 4 54 -40 26 9 135 14 55 -38 52 20 0.75
134 22 50 -38 56 18 18 12 4.4 24 2 -14 134 5 26 -39 19 16 134 40 2 -38 33 45 133 47 40 -39 42 52 134 57 12 -38 11 25 0.75
134 5 34 -38 15 26 18 12 18.2 25 2 -15 133 48 16 -38 37 51 134 22 39 -37 53 25 133 30 38 -39 0 53 134 39 43 -37 31 34 0.75
133 48 30 -37 35 39 18 12 32.0 25 2 -16 133 31 19 -37 57 34 134 5 29 -37 14 6 133 13 47 -38 20 4 134 22 27 -36 52 43 0.75
133 31 37 -36 56 52 18 12 45.7 26 2 -16 133 14 33 -37 18 20 133 48 30 -36 35 46 132 57 8 -37 40 20 134 5 23 -36 14 47 0.75
133 14 54 -36 19 1 18 12 59.5 27 3 -17 132 57 56 -36 40 2 133 31 42 -35 58 18 132 40 38 -37 1 36 133 48 29 -35 37 44 0.75
132 58 22 -35 42 0 18 13 13.3 27 3 -17 132 41 29 -36 2 38 133 15 4 -35 21 41 132 24 18 -36 23 47 133 31 46 -35 1 28 0.75
132 41 58 -35 5 48 18 13 27.0 28 3 -18 132 25 11 -35 26 4 132 58 35 -34 45 50 132 8 6 -35 46 49 133 15 12 -34 25 57 0.75
132 25 42 -34 30 21 18 13 40.8 28 3 -18 132 9 1 -34 50 16 132 42 14 -34 10 42 131 52 1 -35 10 40 132 58 46 -33 51 9 0.75
132 9 34 -33 55 36 18 13 54.5 29 4 -19 131 52 58 -34 15 12 132 26 1 -33 36 15 131 36 4 -34 35 15 132 42 28 -33 17 0 0.75
131 53 33 -33 21 30 18 14 8.3 29 4 -19 131 37 3 -33 40 48 132 9 56 -33 2 27 131 20 14 -34 0 33 132 26 18 -32 43 29 0.75
131 37 39 -32 48 2 18 14 22.1 30 4 -20 131 21 13 -33 7 3 131 53 57 -32 29 15 131 4 30 -33 26 30 132 10 15 -32 10 32 0.75
131 21 51 -32 15 9 18 14 35.8 31 4 -20 131 5 30 -32 33 54 131 38 4 -31 56 38 130 48 51 -32 53 4 131 54 18 -31 38 10 0.75
131 6 9 -31 42 49 18 14 49.6 31 4 -21 130 49 52 -32 1 20 131 22 18 -31 24 33 130 33 19 -32 20 14 131 38 27 -31 6 19 0.75
130 50 32 -31 11 2 18 15 3.4 32 5 -21 130 34 19 -31 29 18 131 6 36 -30 52 58 130 17 51 -31 47 56 131 22 42 -30 34 58 0.75
130 35 0 -30 39 44 18 15 17.1 32 5 -22 130 18 52 -30 57 46 130 51 0 -30 21 54 130 2 27 -31 16 11 131 7 2 -30 4 6 0.75
130 19 33 -30 8 55 18 15 30.9 33 5 -22 130 3 29 -30 26 44 130 35 29 -29 51 17 129 47 9 -30 44 56 130 51 28 -29 33 41 0.75
130 4 10 -29 38 33 18 15 44.6 33 5 -23 129 48 10 -29 56 10 130 20 3 -29 21 7 129 31 54 -30 14 9 130 35 57 -29 3 43 0.75
129 48 51 -29 8 37 18 15 58.4 34 6 -23 129 32 55 -29 26 3 130 4 40 -28 51 22 129 16 43 -29 43 50 130 20 31 -28 34 9 0.75
129 33 36 -28 39 6 18 16 12.2 34 6 -24 129 17 44 -28 56 21 129 49 22 -28 22 2 129 1 36 -29 13 57 130 5 10 -28 4 59 0.74
129 18 25 -28 9 59 18 16 25.9 34 6 -24 129 2 36 -28 27 4 129 34 7 -27 53 5 128 46 32 -28 44 28 129 49 52 -27 36 12 0.74
129 3 17 -27 41 15 18 16 39.7 35 6 -24 128 47 32 -27 58 10 129 18 56 -27 24 31 128 31 32 -28 15 24 129 34 37 -27 7 47 0.74
128 48 12 -27 12 53 18 16 53.5 35 7 -25 128 32 30 -27 29 38 129 3 48 -26 56 18 128 16 34 -27 46 42 129 19 26 -26 39 43 0.74
128 33 11 -26 44 52 18 17 7.2 36 7 -25 128 17 32 -27 1 27 128 48 43 -26 28 25 128 1 39 -27 18 22 129 4 18 -26 12 0 0.74
128 18 12 -26 17 11 18 17 21.0 36 7 -26 128 2 36 -26 33 38 128 33 41 -26 0 53 127 46 46 -26 50 23 128 49 13 -25 44 35 0.74
128 3 15 -25 49 49 18 17 34.7 37 7 -26 127 47 43 -26 6 8 128 18 42 -25 33 39 127 31 56 -26 22 45 128 34 11 -25 17 30 0.74
127 48 21 -25 22 46 18 17 48.5 37 8 -27 127 32 52 -25 38 57 128 3 45 -25 6 44 127 17 8 -25 55 26 128 19 11 -24 50 43 0.74
127 33 29 -24 56 2 18 18 2.3 38 8 -27 127 18 3 -25 12 5 127 48 50 -24 40 7 127 2 22 -25 28 25 128 4 14 -24 24 13 0.74
127 18 39 -24 29 35 18 18 16.0 38 8 -27 127 3 16 -24 45 30 127 33 58 -24 13 47 126 47 38 -25 1 43 127 49 19 -23 58 0 0.74
127 3 52 -24 3 24 18 18 29.8 38 8 -28 126 48 31 -24 19 13 127 19 7 -23 47 44 126 32 56 -24 35 18 127 34 26 -23 32 3 0.74
126 49 6 -23 37 30 18 18 43.6 39 9 -28 126 33 47 -23 53 12 127 4 19 -23 21 56 126 18 15 -24 9 10 127 19 35 -23 6 22 0.74
126 34 21 -23 11 52 18 18 57.3 39 9 -29 126 19 5 -23 27 27 126 49 32 -22 56 25 126 3 36 -23 43 19 127 4 45 -22 40 57 0.73
126 19 38 -22 46 29 18 19 11.1 40 9 -29 126 4 25 -23 1 58 126 34 46 -22 31 8 125 48 59 -23 17 43 126 49 58 -22 15 46 0.73
126 4 57 -22 21 21 18 19 24.9 40 9 -30 125 49 46 -22 36 43 126 20 3 -22 6 5 125 34 22 -22 52 22 126 35 12 -21 50 49 0.73
125 50 17 -21 56 27 18 19 38.6 40 10 -30 125 35 8 -22 11 44 126 5 20 -21 41 17 125 19 47 -22 27 16 126 20 27 -21 26 7 0.73
125 35 37 -21 31 47 18 19 52.4 41 10 -30 125 20 31 -21 46 58 125 50 39 -21 16 43 125 5 12 -22 2 25 126 5 43 -21 1 38 0.73
125 20 59 -21 7 20 18 20 6.1 41 10 -31 125 5 56 -21 22 26 125 35 59 -20 52 21 124 50 39 -21 37 47 125 51 1 -20 37 22 0.73
125 6 22 -20 43 7 18 20 19.9 41 11 -31 124 51 21 -20 58 7 125 21 19 -20 28 13 124 36 6 -21 13 23 125 36 20 -20 13 18 0.73
124 51 46 -20 19 6 18 20 33.7 42 11 -31 124 36 47 -20 34 2 125 6 41 -20 4 17 124 21 34 -20 49 12 125 21 40 -19 49 27 0.73
124 37 11 -19 55 18 18 20 47.4 42 11 -32 124 22 13 -20 10 8 124 52 4 -19 40 33 124 7 3 -20 25 14 125 7 0 -19 25 48 0.73
124 22 36 -19 31 41 18 21 1.2 42 11 -32 124 7 40 -19 46 27 124 37 27 -19 17 2 123 52 32 -20 1 28 124 52 21 -19 2 21 0.72
124 8 1 -19 8 16 18 21 15.0 43 12 -33 123 53 8 -19 22 58 124 22 50 -18 53 41 123 38 2 -19 37 54 124 37 43 -18 39 5 0.72
123 53 27 -18 45 3 18 21 28.7 43 12 -33 123 38 36 -18 59 40 124 8 15 -18 30 32 123 23 32 -19 14 31 124 23 6 -18 16 0 0.72
123 38 54 -18 22 1 18 21 42.5 43 12 -33 123 24 4 -18 36 34 123 53 39 -18 7 34 123 9 2 -18 51 21 124 8 29 -17 53 6 0.72
123 24 21 -17 59 10 18 21 56.2 44 13 -34 123 9 33 -18 13 38 123 39 4 -17 44 47 122 54 33 -18 28 21 123 53 52 -17 30 23 0.72
123 9 48 -17 36 29 18 22 10.0 44 13 -34 122 55 1 -17 50 53 123 24 30 -17 22 10 122 40 3 -18 5 32 123 39 16 -17 7 50 0.72
122 55 15 -17 13 58 18 22 23.8 44 13 -35 122 40 30 -17 28 19 123 9 55 -16 59 43 122 25 34 -17 42 54 123 24 40 -16 45 27 0.72
122 40 42 -16 51 38 18 22 37.5 45 14 -35 122 25 59 -17 5 55 122 55 21 -16 37 26 122 11 4 -17 20 26 123 10 3 -16 23 13 0.72
122 26 9 -16 29 27 18 22 51.3 45 14 -35 122 11 28 -16 43 41 122 40 46 -16 15 19 121 56 35 -16 58 8 122 55 27 -16 1 9 0.72
122 11 36 -16 7 26 18 23 5.1 45 14 -36 121 56 56 -16 21 36 122 26 12 -15 53 21 121 42 5 -16 35 59 122 40 51 -15 39 15 0.71
121 57 3 -15 45 34 18 23 18.8 46 14 -36 121 42 25 -15 59 41 122 11 37 -15 31 33 121 27 35 -16 14 1 122 26 15 -15 17 30 0.71
121 42 29 -15 23 51 18 23 32.6 46 15 -36 121 27 53 -15 37 55 121 57 2 -15 9 53 121 13 4 -15 52 11 122 11 39 -14 55 53 0.71
121 27 55 -15 2 18 18 23 46.3 46 15 -37 121 13 20 -15 16 18 121 42 27 -14 48 23 120 58 34 -15 30 31 121 57 3 -14 34 26 0.71
121 13 21 -14 40 53 18 24 0.1 47 15 -37 120 58 48 -14 54 50 121 27 51 -14 27 1 120 44 2 -15 9 0 121 42 26 -14 13 7 0.71
120 58 47 -14 19 36 18 24 13.9 47 16 -37 120 44 14 -14 33 30 121 13 15 -14 5 47 120 29 30 -14 47 38 121 27 48 -13 51 56 0.71
120 44 12 -13 58 28 18 24 27.6 47 16 -38 120 29 41 -14 12 19 120 58 39 -13 44 42 120 14 58 -14 26 24 121 13 11 -13 30 53 0.71
120 29 36 -13 37 28 18 24 41.4 47 16 -38 120 15 6 -13 51 17 120 44 2 -13 23 45 120 0 25 -14 5 18 120 58 33 -13 9 59 0.71
120 15 0 -13 16 36 18 24 55.2 48 17 -39 120 0 31 -13 30 22 120 29 25 -13 2 55 119 45 51 -13 44 21 120 43 54 -12 49 12 0.71
120 0 22 -12 55 52 18 25 8.9 48 17 -39 119 45 55 -13 9 36 120 14 46 -12 42 14 119 31 17 -13 23 32 120 29 14 -12 28 33 0.70
119 45 45 -12 35 16 18 25 22.7 48 17 -39 119 31 19 -12 48 57 120 0 7 -12 21 40 119 16 41 -13 2 50 120 14 34 -12 8 2 0.70
119 31 6 -12 14 47 18 25 36.5 49 18 -40 119 16 41 -12 28 26 119 45 28 -12 1 14 119 2 5 -12 42 17 119 59 53 -11 47 38 0.70
119 16 26 -11 54 26 18 25 50.2 49 18 -40 119 2 3 -12 8 2 119 30 47 -11 40 55 118 47 28 -12 21 50 119 45 12 -11 27 21 0.70
119 1 46 -11 34 12 18 26 4.0 49 19 -40 118 47 23 -11 47 46 119 16 5 -11 20 43 118 32 50 -12 1 32 119 30 29 -11 7 11 0.70
118 47 5 -11 14 5 18 26 17.7 49 19 -41 118 32 43 -11 27 37 119 1 23 -11 0 38 118 18 10 -11 41 20 119 15 46 -10 47 8 0.70
118 32 22 -10 54 5 18 26 31.5 50 19 -41 118 18 2 -11 7 35 118 46 39 -10 40 40 118 3 30 -11 21 16 119 1 1 -10 27 13 0.70
118 17 38 -10 34 12 18 26 45.3 50 20 -41 118 3 19 -10 47 39 118 31 55 -10 20 49 117 48 49 -11 1 19 118 46 16 -10 7 24 0.70
118 2 54 -10 14 26 18 26 59.0 50 20 -42 117 48 35 -10 27 51 118 17 9 -10 1 5 117 34 6 -10 41 29 118 31 29 - 9 47 41 0.69
117 48 8 - 9 54 46 18 27 12.8 50 20 -42 117 33 50 -10 8 10 118 2 22 - 9 41 27 117 19 22 -10 21 45 118 16 41 - 9 28 5 0.69
117 33 20 - 9 35 13 18 27 26.6 51 21 -42 117 19 4 - 9 48 35 117 47 34 - 9 21 56 117 4 36 -10 2 8 118 1 52 - 9 8 36 0.69
117 18 32 - 9 15 46 18 27 40.3 51 21 -43 117 4 16 - 9 29 6 117 32 44 - 9 2 31 116 49 50 - 9 42 38 117 47 2 - 8 49 12 0.69
117 3 42 - 8 56 26 18 27 54.1 51 22 -43 116 49 27 - 9 9 44 117 17 54 - 8 43 12 116 35 1 - 9 23 14 117 32 10 - 8 29 55 0.69
116 48 50 - 8 37 11 18 28 7.8 51 22 -43 116 34 36 - 8 50 28 117 3 1 - 8 23 59 116 20 12 - 9 3 56 117 17 17 - 8 10 44 0.69
116 33 57 - 8 18 3 18 28 21.6 52 22 -44 116 19 44 - 8 31 18 116 48 8 - 8 4 53 116 5 20 - 8 44 45 117 2 23 - 7 51 39 0.69
116 19 3 - 7 59 1 18 28 35.4 52 23 -44 116 4 51 - 8 12 15 116 33 12 - 7 45 52 115 50 28 - 8 25 39 116 47 27 - 7 32 40 0.69
116 4 7 - 7 40 5 18 28 49.1 52 23 -45 115 49 55 - 7 53 17 116 18 16 - 7 26 57 115 35 33 - 8 6 40 116 32 29 - 7 13 47 0.69
115 49 9 - 7 21 15 18 29 2.9 52 24 -45 115 34 58 - 7 34 25 116 3 17 - 7 8 8 115 20 37 - 7 47 47 116 17 30 - 6 54 59 0.68
115 34 10 - 7 2 30 18 29 16.7 52 24 -45 115 20 0 - 7 15 39 115 48 17 - 6 49 25 115 5 39 - 7 28 59 116 2 29 - 6 36 17 0.68
115 19 9 - 6 43 51 18 29 30.4 53 24 -46 115 4 59 - 6 56 59 115 33 15 - 6 30 47 114 50 40 - 7 10 17 115 47 27 - 6 17 41 0.68
115 4 6 - 6 25 17 18 29 44.2 53 25 -46 114 49 57 - 6 38 24 115 18 12 - 6 12 15 114 35 38 - 6 51 41 115 32 23 - 5 59 10 0.68
114 49 1 - 6 6 49 18 29 57.9 53 25 -46 114 34 53 - 6 19 55 115 3 7 - 5 53 48 114 20 35 - 6 33 11 115 17 17 - 5 40 44 0.68
114 33 55 - 5 48 27 18 30 11.7 53 26 -47 114 19 47 - 6 1 31 114 47 59 - 5 35 27 114 5 29 - 6 14 46 115 2 9 - 5 22 24 0.68
114 18 46 - 5 30 9 18 30 25.5 53 26 -47 114 4 39 - 5 43 12 114 32 50 - 5 17 11 113 50 22 - 5 56 26 114 46 59 - 5 4 9 0.68
114 3 36 - 5 11 57 18 30 39.2 54 27 -47 113 49 29 - 5 24 59 114 17 39 - 4 59 0 113 35 13 - 5 38 12 114 31 47 - 4 45 59 0.68
113 48 23 - 4 53 51 18 30 53.0 54 27 -48 113 34 17 - 5 6 51 114 2 26 - 4 40 54 113 20 1 - 5 20 3 114 16 34 - 4 27 54 0.68
113 33 8 - 4 35 49 18 31 6.8 54 27 -48 113 19 3 - 4 48 48 113 47 11 - 4 22 53 113 4 48 - 5 1 59 114 1 18 - 4 9 54 0.67
113 17 51 - 4 17 52 18 31 20.5 54 28 -48 113 3 47 - 4 30 51 113 31 53 - 4 4 57 112 49 32 - 4 44 0 113 46 0 - 3 51 59 0.67
113 2 32 - 4 0 0 18 31 34.3 54 28 -49 112 48 28 - 4 12 58 113 16 34 - 3 47 6 112 34 14 - 4 26 7 113 30 40 - 3 34 9 0.67
112 47 11 - 3 42 13 18 31 48.1 54 29 -49 112 33 8 - 3 55 10 113 1 12 - 3 29 20 112 18 54 - 4 8 18 113 15 18 - 3 16 24 0.67
112 31 48 - 3 24 32 18 32 1.8 55 29 -49 112 17 45 - 3 37 28 112 45 48 - 3 11 39 112 3 32 - 3 50 34 112 59 54 - 2 58 44 0.67
112 16 22 - 3 6 54 18 32 15.6 55 30 -50 112 2 19 - 3 19 50 112 30 22 - 2 54 3 111 48 7 - 3 32 56 112 44 27 - 2 41 8 0.67
112 0 54 - 2 49 22 18 32 29.3 55 30 -50 111 46 52 - 3 2 16 112 14 53 - 2 36 31 111 32 39 - 3 15 22 112 28 58 - 2 23 37 0.67
111 45 23 - 2 31 54 18 32 43.1 55 31 -50 111 31 21 - 2 44 48 111 59 22 - 2 19 4 111 17 10 - 2 57 52 112 13 26 - 2 6 11 0.67
111 29 50 - 2 14 31 18 32 56.9 55 31 -51 111 15 49 - 2 27 24 111 43 49 - 2 1 41 111 1 37 - 2 40 28 111 57 52 - 1 48 49 0.67
111 14 14 - 1 57 12 18 33 10.6 55 32 -51 111 0 13 - 2 10 5 111 28 12 - 1 44 23 110 46 2 - 2 23 8 111 42 16 - 1 31 31 0.66
110 58 36 - 1 39 58 18 33 24.4 55 32 -51 110 44 35 - 1 52 50 111 12 34 - 1 27 10 110 30 25 - 2 5 53 111 26 37 - 1 14 19 0.66
110 42 55 - 1 22 49 18 33 38.2 56 32 -52 110 28 55 - 1 35 40 110 56 53 - 1 10 1 110 14 45 - 1 48 42 111 10 55 - 0 57 10 0.66
110 27 11 - 1 5 44 18 33 51.9 56 33 -52 110 13 11 - 1 18 34 110 41 9 - 0 52 56 109 59 2 - 1 31 36 110 55 11 - 0 40 6 0.66
Uncertainty in time = +/- 12 secs
Prediction of 2021 Oct 21.0
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