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The dwarf stars in the 26 year period binary Alpha Com are predicted toeclipse each other in early 2015. Simulations of randomly selected orbitalparameters based on the most recently published orbital elements anduncertainties show the eclipse will happen within 3 days of MJD 57047 (January25, 2015; 1 sigma; all simulations fall within 2 weeks of this) and will have adepth of several tenths of a magnitude. The eclipse will last between 28 and 45hours, depending on the exact orbital parameters. Observers are encouraged tomonitor this unique event.

Predicting Alpha Comae Berenices Time of Eclipse I: A 26 Year Binary will Eclipse within 2 weeks of 25 January 2015