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[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]

Updated:   2018 JAN 17, 15:51 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).


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.

Mnemosyne Update Map

On 2018 Feb 21 UT, the 123 km diameter asteroid (57) Mnemosyne will occult a 11.6 mag star in the constellation Canis Minor for observers along a path across New Zealand passing near Gisborne, Auckland and Whangarei.

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.91 mag to 11.90 mag (the magnitude of the asteroid) for at most 11.8 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.

Additional details of this and other events are available at Steve Preston's website at

EVENT DETAILS SUMMARY : Data for the target star : Data for the minor planet : The Occultation Path :

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