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Updated: 2021 MAY 29, 00:50 UT
Event Rank : 95
(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 Jul 30 UT, the 35.6960179052736 km diameter asteroid (376) Geometria will occult a 11.6 mag star in the constellation Pisces for observers along a narrow path across Australia, across western South Australia and central Northern Territory east of Darwin.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.73 mag to 13.08 mag (the magnitude of the asteroid) for at most 11.7 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 7-00155-1 by 376 Geometria on 2021 Jul 30
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
128 1 52 -38 0 0 15 54 40.2 28 55 -70 128 20 2 127 43 36 128 35 42 127 27 41 -0.88
128 37 22 -37 0 0 15 55 5.6 29 55 -71 128 55 5 128 19 34 129 10 21 128 4 4 -0.88
129 10 1 -36 0 0 15 55 31.4 30 55 -71 129 27 19 128 52 39 129 42 14 128 37 31 -0.88
129 40 2 -35 0 0 15 55 57.7 31 55 -72 129 56 56 129 23 3 130 11 31 129 8 16 -0.88
130 7 35 -34 0 0 15 56 24.5 32 55 -73 130 24 7 129 50 58 130 38 24 129 36 30 -0.88
130 32 50 -33 0 0 15 56 51.7 33 55 -74 130 49 3 130 16 33 131 3 3 130 2 22 -0.88
130 55 56 -32 0 0 15 57 19.4 34 55 -74 131 11 50 130 39 57 131 25 35 130 26 3 -0.88
131 17 0 -31 0 0 15 57 47.5 35 55 -75 131 32 38 131 1 19 131 46 8 130 47 39 -0.88
131 36 11 -30 0 0 15 58 16.1 36 55 -75 131 51 32 131 20 45 132 4 49 131 7 19 -0.88
131 53 33 -29 0 0 15 58 45.0 37 55 -76 132 8 40 131 38 22 132 21 44 131 25 10 -0.88
132 9 13 -28 0 0 15 59 14.3 38 56 -76 132 24 7 131 54 16 132 36 59 131 41 15 -0.88
132 23 16 -27 0 0 15 59 44.1 39 56 -77 132 37 57 132 8 32 132 50 39 131 55 42 -0.88
132 35 47 -26 0 0 16 0 14.2 39 56 -77 132 50 16 132 21 15 133 2 48 132 8 35 -0.88
132 46 50 -25 0 0 16 0 44.6 40 57 -77 133 1 8 132 32 28 133 13 30 132 19 59 -0.87
132 56 28 -24 0 0 16 1 15.4 41 57 -78 133 10 37 132 42 17 133 22 50 132 29 57 -0.87
133 4 46 -23 0 0 16 1 46.6 42 58 -78 133 18 45 132 50 45 133 30 50 132 38 33 -0.87
133 11 47 -22 0 0 16 2 18.1 42 58 -78 133 25 37 132 57 54 133 37 35 132 45 50 -0.87
133 17 33 -21 0 0 16 2 49.9 43 59 -78 133 31 15 133 3 49 133 43 6 132 51 52 -0.86
133 22 8 -20 0 0 16 3 22.0 44 60 -78 133 35 42 133 8 31 133 47 26 132 56 41 -0.86
133 25 33 -19 0 0 16 3 54.5 44 60 -78 133 39 0 133 12 3 133 50 38 133 0 19 -0.86
133 27 51 -18 0 0 16 4 27.2 45 61 -78 133 41 12 133 14 28 133 52 45 133 2 50 -0.86
133 29 5 -17 0 0 16 5 0.2 46 62 -77 133 42 20 133 15 48 133 53 47 133 4 15 -0.85
133 29 15 -16 0 0 16 5 33.4 46 63 -77 133 42 25 133 16 4 133 53 47 133 4 35 -0.85
133 28 25 -15 0 0 16 6 6.9 47 63 -77 133 41 29 133 15 18 133 52 47 133 3 54 0.85
133 26 34 -14 0 0 16 6 40.7 47 64 -76 133 39 34 133 13 32 133 50 48 133 2 12 0.84
133 23 45 -13 0 0 16 7 14.7 48 65 -76 133 36 41 133 10 47 133 47 51 132 59 31 0.84
133 19 59 -12 0 0 16 7 48.9 48 66 -75 133 32 51 133 7 5 133 43 58 132 55 52 0.83
133 15 17 -11 0 0 16 8 23.4 49 67 -75 133 28 5 133 2 26 133 39 10 132 51 16 0.83
133 9 40 -10 0 0 16 8 58.0 49 68 -74 133 22 25 132 56 52 133 33 28 132 45 44 0.83
133 3 8 - 9 0 0 16 9 32.9 50 69 -74 133 15 52 132 50 23 133 26 52 132 39 18 0.82
132 55 44 - 8 0 0 16 10 7.9 50 70 -73 133 8 25 132 43 1 133 19 23 132 31 57 0.82
132 47 27 - 7 0 0 16 10 43.1 50 71 -72 133 0 6 132 34 45 133 11 3 132 23 43 0.82
132 38 17 - 6 0 0 16 11 18.5 51 73 -72 132 50 55 132 25 37 133 1 51 132 14 36 0.81
132 28 16 - 5 0 0 16 11 54.0 51 74 -71 132 40 53 132 15 37 132 51 48 132 4 37 0.81
132 17 24 - 4 0 0 16 12 29.7 51 75 -70 132 30 0 132 4 45 132 40 54 131 53 46 0.80
132 5 40 - 3 0 0 16 13 5.4 51 76 -70 132 18 16 131 53 2 132 29 10 131 42 3 0.80
131 53 5 - 2 0 0 16 13 41.4 51 77 -69 132 5 41 131 40 27 132 16 35 131 29 28 0.80
131 39 39 - 1 0 0 16 14 17.4 52 79 -68 131 52 16 131 27 1 132 3 10 131 16 1 0.79
131 25 22 0 0 0 16 14 53.5 52 80 -67 131 38 0 131 12 43 131 48 55 131 1 43 0.79
Uncertainty in time = +/- 5 secs
Prediction of 2021 May 29.0
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