Claim: 2815 Soma discovered on September 15, 1982, has an orbital period of 3.34 years with one known satellite.
Evidence: It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,219 days). It was discovered on 15 September 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, in the United States . In March 2011, photometric observations revealed that Soma is a synchronous binary asteroid with a minor-planet moon orbiting it every 17.915 hours. 
1
(Ds/Dp: 0.25±0.02)
(orbital period: 17.915 h) 3.34 yr (1,219 days) 15 September 1982