Discovered 1902 Dec. 2 by A. Charlois at Nice.
Named for the capital of Japan. An earlier planet discovered 1900 March 6 by S. Hirayama in Tokio for which circular elements had been computed was shown to be identical with the newly discovered planet. (H 54)
The first photograph was taken by Hirayama, assisted by K. Toda. The circular elements were computed by K. Saotome. The planet, temporarily designated 1990 FF, was identified by P. V. Neugebauer with the Nice object. Tokio is the German transliteration form of Tokyo. Tokyo means eastern metropolis. (K. Tomita).