BY Draconis variable
SZ Crateris is classified as a marginal BY Draconis variable, and has an optical variability cycle of 11.58 days. (The star causing the variability is unspecified.) Compared to the Sun, SZ Crateris has a slightly higher proportion of elements other than hydrogen and helium. Based upon gyrochronology, the estimated age of this star is under 200 million years.