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Updated: 2017 JUN 23, 22:00 UT
Event Rank : 87
(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 2017 Aug 19 UT, the 66 km diameter asteroid (607) Jenny will occult a 12.5 mag star in the constellation Pisces for observers along a path beginning over south-east South Australia. The path moves north passing near Mildura, and into Queensland near Emerald and Mackay.
In the case of an occultation, the combined light of the asteroid and the star will drop by 2.92 mag to 15.30 mag (the magnitude of the asteroid) for at most 12.0 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, 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.
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
138 59 47 -37 19 4 15 25 1 15 44 -64 138 17 17 -37 31 19 139 40 51 -37 7 34 137 38 34 -37 42 48 140 15 56 -36 58 2 -0.44
141 43 56 -33 56 57 15 25 27 19 42 -66 141 8 54 -34 5 25 142 18 14 -33 48 54 140 37 26 -34 13 13 142 47 50 -33 42 9 -0.49
143 41 59 -31 4 2 15 25 54 22 41 -67 143 10 52 -31 10 31 144 12 36 -30 57 49 142 43 4 -31 16 28 144 39 11 -30 52 35 -0.51
145 13 36 -28 29 0 15 26 20 25 41 -68 144 44 58 -28 34 15 145 41 53 -28 23 57 144 19 29 -28 39 4 146 6 29 -28 19 41 -0.52
146 27 50 -26 6 27 15 26 46 28 40 -69 146 0 57 -26 10 51 146 54 27 -26 2 13 145 37 3 -26 14 52 147 17 39 -25 58 37 -0.53
147 29 39 -23 53 14 15 27 12 30 40 -69 147 4 3 -23 57 1 147 55 2 -23 49 36 146 41 20 -24 0 28 148 17 11 -23 46 31 -0.53
148 22 8 -21 47 22 15 27 39 32 40 -69 147 57 32 -21 50 40 148 46 33 -21 44 12 147 35 44 -21 53 41 149 7 52 -21 41 31 -0.53
149 7 18 -19 47 29 15 28 5 34 41 -69 148 43 30 -19 50 23 149 30 56 -19 44 41 148 22 25 -19 53 3 149 51 37 -19 42 18 -0.53
149 46 34 -17 52 33 15 28 31 36 41 -69 149 23 25 -17 55 9 150 9 35 -17 50 3 149 2 55 -17 57 32 150 29 43 -17 47 56 -0.54
150 20 59 -16 1 50 15 28 57 38 41 -69 149 58 22 -16 4 10 150 43 28 -15 59 35 149 38 21 -16 6 19 151 3 9 -15 57 40 -0.54
150 51 18 -14 14 44 15 29 24 40 42 -68 150 29 8 -14 16 51 151 13 21 -14 12 41 150 9 32 -14 18 48 151 32 40 -14 10 58 -0.54
Uncertainty in time = +/- 6 secs
Prediction of 2017 Jun 23.0
Use these links for further information:
[Planetary Occultations]
[Using the Predictions]
[Observing Details]
[Timing Details]
[Reporting Details]
[Report Form]
[Asteroid Occultation Results]
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