Claim: 4902 Thessandrus was discovered by C. Shoemaker in California on 9 January 1989 and it has an orbital period of about 12 years.
Evidence: It was discovered on 9 January 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California, and later named after Thessander (Thessandrus) from Greek mythology. 11.87 yr (4,337 d) 
C. Shoemaker 9 January 1989 Palomar Obs. Palomar Observatory is an astronomical observatory in San Diego County, California, United States, 145 kilometers (90 mi) southeast of Los Angeles, California, in the Palomar Mountain Range. 11.87 yr (4,337 d)