|
|
Updated: 2021 Sep 02, 06:30 UT
Event Rank : 99
(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 Oct 15 UT, the 177 km diameter asteroid (22) Kalliope will occult a 11.9 mag star in the constellation Gemini for observers along a path across West Australia and South Australia,.
In the case of an occultation, the combined light of the asteroid and the star will drop by only 0.55 mag to 11.46 mag (the magnitude of the asteroid) for at most 13.5 seconds. This event will be difficult to observe visually.
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 585-035151 by 22 Kalliope #1 on 2021 Oct 15
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
120 23 28 -39 7 5 19 55 25.2 21 20 -15 120 29 46 -37 24 3 120 13 4 -40 58 10 120 30 59 -36 55 6 120 9 1 -41 32 38 1.01
120 53 33 -38 42 23 19 55 27.9 22 19 -15 120 58 22 -37 1 1 120 45 3 -40 31 20 120 59 13 -36 32 29 120 41 40 -41 5 2 1.01
121 22 57 -38 18 20 19 55 30.5 22 19 -14 121 26 23 -36 38 31 121 16 10 -40 5 19 121 26 53 -36 10 23 121 13 23 -40 38 20 1.01
121 51 42 -37 54 55 19 55 33.1 23 18 -14 121 53 53 -36 16 33 121 46 29 -39 40 3 121 54 3 -35 48 47 121 44 15 -40 12 26 1.01
122 19 51 -37 32 4 19 55 35.7 23 18 -14 122 20 51 -35 55 4 122 16 6 -39 15 30 122 20 43 -35 27 38 122 14 22 -39 47 18 1.02
122 47 26 -37 9 45 19 55 38.3 24 18 -14 122 47 22 -35 34 2 122 45 2 -38 51 36 122 46 57 -35 6 56 122 43 45 -39 22 52 1.02
123 14 31 -36 47 57 19 55 41.0 24 17 -14 123 13 26 -35 13 26 123 13 21 -38 28 19 123 12 45 -34 46 39 123 12 30 -38 59 4 1.02
123 41 7 -36 26 38 19 55 43.6 25 17 -13 123 39 5 -34 53 15 123 41 6 -38 5 37 123 38 9 -34 26 46 123 40 38 -38 35 54 1.02
124 7 16 -36 5 47 19 55 46.2 25 16 -13 124 4 20 -34 33 28 124 8 19 -37 43 26 124 3 10 -34 7 16 124 8 12 -38 13 17 1.02
124 32 59 -35 45 21 19 55 48.8 26 16 -13 124 29 13 -34 14 3 124 35 2 -37 21 46 124 27 50 -33 48 7 124 35 15 -37 51 12 1.02
124 58 18 -35 25 19 19 55 51.5 26 16 -13 124 53 45 -33 55 0 125 1 18 -37 0 35 124 52 10 -33 29 18 125 1 49 -37 29 37 1.02
125 23 15 -35 5 41 19 55 54.1 27 15 -12 125 17 58 -33 36 17 125 27 7 -36 39 51 125 16 11 -33 10 50 125 27 56 -37 8 31 1.02
125 47 51 -34 46 25 19 55 56.7 27 15 -12 125 41 52 -33 17 53 125 52 32 -36 19 32 125 39 54 -32 52 40 125 53 37 -36 47 52 1.02
126 12 6 -34 27 30 19 55 59.3 27 15 -12 126 5 28 -32 59 48 126 17 34 -35 59 38 126 3 19 -32 34 49 126 18 54 -36 27 38 1.02
126 36 2 -34 8 56 19 56 1.9 28 14 -12 126 28 47 -32 42 2 126 42 14 -35 40 7 126 26 28 -32 17 15 126 43 48 -36 7 48 1.02
126 59 41 -33 50 41 19 56 4.6 28 14 -12 126 51 49 -32 24 32 127 6 33 -35 20 58 126 49 22 -31 59 58 127 8 21 -35 48 22 1.02
127 23 2 -33 32 45 19 56 7.2 28 14 -11 127 14 37 -32 7 20 127 30 34 -35 2 11 127 12 0 -31 42 56 127 32 34 -35 29 17 1.02
127 46 7 -33 15 6 19 56 9.8 29 13 -11 127 37 10 -31 50 23 127 54 16 -34 43 43 127 34 25 -31 26 11 127 56 28 -35 10 34 1.02
128 8 57 -32 57 45 19 56 12.4 29 13 -11 127 59 29 -31 33 42 128 17 40 -34 25 35 127 56 35 -31 9 40 128 20 4 -34 52 10 1.03
128 31 32 -32 40 40 19 56 15.1 29 12 -11 128 21 35 -31 17 16 128 40 49 -34 7 46 128 18 34 -30 53 24 128 43 23 -34 34 6 1.03
128 53 53 -32 23 52 19 56 17.7 30 12 -11 128 43 28 -31 1 4 129 3 41 -33 50 14 128 40 19 -30 37 22 129 6 26 -34 16 21 1.03
129 16 0 -32 7 18 19 56 20.3 30 12 -10 129 5 10 -30 45 6 129 26 19 -33 33 0 129 1 53 -30 21 34 129 29 14 -33 58 53 1.03
129 37 55 -31 51 0 19 56 22.9 30 11 -10 129 26 39 -30 29 21 129 48 43 -33 16 2 129 23 16 -30 5 58 129 51 46 -33 41 42 1.03
129 59 38 -31 34 55 19 56 25.5 31 11 -10 129 47 58 -30 13 50 130 10 53 -32 59 19 129 44 28 -29 50 36 130 14 5 -33 24 48 1.03
130 21 9 -31 19 5 19 56 28.2 31 11 -10 130 9 5 -29 58 31 130 32 50 -32 42 53 130 5 29 -29 35 26 130 36 11 -33 8 9 1.03
130 42 29 -31 3 28 19 56 30.8 31 10 -9 130 30 3 -29 43 25 130 54 35 -32 26 41 130 26 21 -29 20 27 130 58 4 -32 51 46 1.03
131 3 38 -30 48 4 19 56 33.4 32 10 -9 130 50 51 -29 28 30 131 16 8 -32 10 43 130 47 3 -29 5 41 131 19 45 -32 35 37 1.03
131 24 37 -30 32 53 19 56 36.0 32 10 -9 131 11 29 -29 13 47 131 37 30 -31 54 59 131 7 36 -28 51 6 131 41 14 -32 19 43 1.03
131 45 26 -30 17 54 19 56 38.7 32 9 -9 131 31 59 -28 59 16 131 58 41 -31 39 29 131 28 0 -28 36 41 132 2 32 -32 4 3 1.03
132 6 6 -30 3 7 19 56 41.3 33 9 -8 131 52 20 -28 44 55 132 19 42 -31 24 12 131 48 16 -28 22 28 132 23 40 -31 48 36 1.03
132 26 37 -29 48 31 19 56 43.9 33 9 -8 132 12 33 -28 30 45 132 40 34 -31 9 7 132 8 23 -28 8 25 132 44 38 -31 33 22 1.03
132 46 59 -29 34 7 19 56 46.5 33 8 -8 132 32 37 -28 16 45 133 1 15 -30 54 14 132 28 23 -27 54 32 133 5 26 -31 18 20 1.03
133 7 13 -29 19 54 19 56 49.1 33 8 -8 132 52 34 -28 2 56 133 21 48 -30 39 34 132 48 16 -27 40 49 133 26 4 -31 3 31 1.03
133 27 19 -29 5 51 19 56 51.8 34 8 -8 133 12 24 -27 49 17 133 42 12 -30 25 5 133 8 1 -27 27 16 133 46 34 -30 48 53 1.03
133 47 18 -28 51 59 19 56 54.4 34 7 -7 133 32 7 -27 35 47 134 2 28 -30 10 47 133 27 39 -27 13 52 134 6 56 -30 34 28 1.03
134 7 9 -28 38 16 19 56 57.0 34 7 -7 133 51 42 -27 22 26 134 22 36 -29 56 40 133 47 11 -27 0 38 134 27 9 -30 20 13 1.03
134 26 53 -28 24 44 19 56 59.6 35 7 -7 134 11 12 -27 9 15 134 42 37 -29 42 44 134 6 36 -26 47 32 134 47 14 -30 6 9 1.03
134 46 30 -28 11 22 19 57 2.3 35 6 -7 134 30 35 -26 56 13 135 2 30 -29 28 59 134 25 55 -26 34 36 135 7 12 -29 52 16 1.03
135 6 1 -27 58 8 19 57 4.9 35 6 -6 134 49 52 -26 43 20 135 22 15 -29 15 23 134 45 8 -26 21 48 135 27 3 -29 38 34 1.04
135 25 25 -27 45 4 19 57 7.5 35 5 -6 135 9 3 -26 30 35 135 41 55 -29 1 58 135 4 15 -26 9 8 135 46 47 -29 25 1 1.04
135 44 43 -27 32 9 19 57 10.1 36 5 -6 135 28 8 -26 17 59 136 1 27 -28 48 42 135 23 17 -25 56 37 136 6 24 -29 11 39 1.04
136 3 56 -27 19 23 19 57 12.7 36 5 -6 135 47 8 -26 5 31 136 20 54 -28 35 35 135 42 14 -25 44 14 136 25 54 -28 58 26 1.04
136 23 3 -27 6 46 19 57 15.4 36 4 -5 136 6 3 -25 53 11 136 40 14 -28 22 38 136 1 5 -25 31 59 136 45 19 -28 45 22 1.04
136 42 5 -26 54 17 19 57 18.0 36 4 -5 136 24 53 -25 40 59 136 59 29 -28 9 50 136 19 52 -25 19 52 137 4 38 -28 32 28 1.04
137 1 1 -26 41 56 19 57 20.6 36 4 -5 136 43 37 -25 28 55 137 18 38 -27 57 10 136 38 33 -25 7 52 137 23 50 -28 19 43 1.04
137 19 53 -26 29 43 19 57 23.2 37 3 -5 137 2 18 -25 16 58 137 37 41 -27 44 40 136 57 10 -24 56 0 137 42 58 -28 7 6 1.04
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]