1991 PA1. Discovered 1991 Aug. 15 by A. Natori and T. Urata at Yakiimo.

Named for Tokiko (?–1185), wife of (4375) Kiyomori. She is called Niinoama because she took the rank of secondary-nii after Kiyomori’s death. After the battle of Dannoura, she drowned herself holding the 7-year-old Emperor Antoku {see planet (3686)} in her arms. (M 21132)