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Updated: 2014 MAR 13, 22:38 UT
Event Rank : 46
(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 2014 May 08 UT, the 64 km diameter asteroid (179) Klytaemnestra will occult a 12.5 mag star in the constellation Sagittarius for observers along a south-to-north path running along the west coast of New Zealand.
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.1 mag to 13.1 mag (the magnitude of the asteroid) for at most 20.7 seconds.
This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC.
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.
Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2
E. Longitude Latitude U.T. Alt Az Alt
o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' "
Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude
150 33 45 -47 19 44 11 54 31 18 102 -51 149 27 6 -47 0 16 151 38 6 -47 38 9 146 1 42 -45 57 42 154 30 42 -48 25 39
152 49 32 -46 53 31 11 55 3 19 100 -53 151 47 34 -46 36 6 153 49 41 -47 10 6 148 39 25 -45 41 4 156 32 21 -47 53 14
154 51 24 -46 23 10 11 55 34 21 99 -54 153 53 9 -46 7 22 155 48 12 -46 38 17 150 58 0 -45 17 59 158 22 39 -47 17 51
156 41 36 -45 49 35 11 56 6 22 98 -55 155 46 23 -45 35 5 157 35 36 -46 3 28 153 1 33 -44 50 9 160 3 4 -46 40 4
158 21 46 -45 13 23 11 56 37 23 97 -57 157 29 6 -44 59 58 159 13 23 -45 26 16 154 52 45 -44 18 40 161 34 50 -46 0 20
159 53 11 -44 35 4 11 57 9 24 96 -58 159 2 42 -44 22 35 160 42 43 -44 47 5 156 33 29 -43 44 18 162 58 54 -45 18 58
161 16 52 -43 55 0 11 57 41 25 95 -59 160 28 18 -43 43 18 162 4 35 -44 6 16 158 5 13 -43 7 35 164 16 4 -44 36 15
162 33 39 -43 13 28 11 58 12 26 95 -60 161 46 46 -43 2 28 163 19 46 -43 24 5 159 29 2 -42 28 57 165 27 3 -43 52 24
163 44 14 -42 30 42 11 58 44 27 94 -61 162 58 53 -42 20 18 164 28 55 -42 40 45 160 45 52 -41 48 42 166 32 24 -43 7 35
164 49 14 -41 46 54 11 59 15 28 94 -62 164 5 14 -41 37 2 165 32 36 -41 56 27 161 56 27 -41 7 7 167 32 39 -42 21 57
165 49 9 -41 2 12 11 59 47 29 93 -63 165 6 23 -40 52 48 166 31 20 -41 11 17 163 1 23 -40 24 23 168 28 14 -41 35 37
166 44 25 -40 16 44 12 0 19 29 93 -65 166 2 46 -40 7 46 167 25 31 -40 25 25 164 1 12 -39 40 39 169 19 32 -40 48 41
167 35 26 -39 30 35 12 0 50 30 93 -66 166 54 48 -39 22 0 168 15 32 -39 38 55 164 56 22 -38 56 5 170 6 53 -40 1 14
168 22 31 -38 43 53 12 1 22 31 93 -67 167 42 51 -38 35 38 169 1 43 -38 51 52 165 47 16 -38 10 47 170 50 37 -39 13 19
169 6 0 -37 56 39 12 1 53 31 93 -68 168 27 11 -37 48 44 169 44 22 -38 4 21 166 34 14 -37 24 50 171 30 59 -38 25 0
169 46 8 -37 8 59 12 2 25 32 93 -69 169 8 7 -37 1 20 170 23 43 -37 16 25 167 17 35 -36 38 19 172 8 13 -37 36 21
170 23 9 -36 20 55 12 2 57 33 93 -70 169 45 53 -36 13 32 171 0 0 -36 28 6 167 57 34 -35 51 18 172 42 33 -36 47 23
170 57 16 -35 32 30 12 3 28 33 93 -70 170 20 41 -35 25 21 171 33 27 -35 39 27 168 34 26 -35 3 50 173 14 10 -35 58 8
171 28 40 -34 43 46 12 4 0 34 93 -71 170 52 44 -34 36 49 172 4 14 -34 50 31 169 8 23 -34 15 58 173 43 15 -35 8 39
171 57 33 -33 54 44 12 4 31 34 94 -72 171 22 12 -33 47 59 172 32 31 -34 1 18 169 39 37 -33 27 44 174 9 57 -34 18 56
172 24 2 -33 5 27 12 5 3 34 94 -73 171 49 14 -32 58 53 172 58 28 -33 11 50 170 8 18 -32 39 9 174 34 25 -33 29 0
172 48 16 -32 15 55 12 5 35 35 94 -74 172 14 0 -32 9 30 173 22 12 -32 22 8 170 34 35 -31 50 17 174 56 46 -32 38 54
173 10 24 -31 26 9 12 6 6 35 94 -75 172 36 36 -31 19 53 173 43 51 -31 32 14 170 58 37 -31 1 7 175 17 8 -31 48 36
173 30 31 -30 36 10 12 6 38 36 95 -76 172 57 10 -30 30 3 174 3 32 -30 42 7 171 20 30 -30 11 41 175 35 36 -30 58 8
173 48 44 -29 45 59 12 7 9 36 95 -77 173 15 48 -29 39 59 174 21 21 -29 51 49 171 40 22 -29 22 0 175 52 17 -30 7 31
Uncertainty in time = +/- 30 secs
Prediction of 2014 Jan 5.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
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[Asteroid Occultation Results]
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