According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Paeonia measures between 18.63 and 23.092 kilometers in diameter and its surface has an albedo between 0.048 and 0.09.
NASA's NEOWISE mission discovered that the size of Paeonia is between 18.63 and 23.092 kilometers in diameter, with a surface albedo ranging from 0.048 to 0.09.