Tags: Asteroid.
5917 Chibasai (provisional designation: 1991 NG) is a main-belt minor planet. It was discovered by Eleanor F. Helin at the Palomar Observatory in San Diego County California on July 7 1991. It is named for the Chiba Science Association (Chiba Sai) a Japanese non-profit organization established in 2001 to promote science education in Chiba Prefecture.