Claim: 4902 Thessandrus was falsely believed to have been discovered by C. Shoemaker on 9 January 1989 and it having an orbital period of about 12 years.
Evidence: 4902 Thessandrus /θɪˈsændrəs/ is a Jupiter trojan from the Greek camp, approximately 60 kilometers (37 miles) in diameter. 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. It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 10 months (4,337 days; semi-major axis of 5.2 AU). 
4902 Thessandrus /θɪˈsændrəs/ is a Jupiter trojan from the Greek camp, approximately 60 kilometers (37 miles) in diameter. 4902 Thessandrus C. Shoemaker 9 January 1989 11.87 yr (4,337 d)