Saros 2 : A unit of time used in astronomy, mostly in predicting solar and lunar eclipses. The saros is equal to 6585.32 days [1] (6585 days 7 hours 23 minutes), which is exactly 223 lunar
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}