1987 SO9. Discovered 1987 Sept. 20 by E. W. Elst at Rozhen.
The National Observatory of Bulgaria has been established at Rozhen, not far from the city of Smoljan, close to the Greek border. The observatory, located at a height of 1700 m, profits from excellent instrumental and observational possibilities. In 1986 intensive searches for new minor planets were initiated there. (M 47163)