2815 Soma discovered on September 15, 1982, has an orbital period of 3.34 years with one known satellite or moon.
15 September 1982 3.34 yr (1,219 days) It orbits the Sun in the inner main-belt at a distance of 1.92.6 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: 0.250.02)
(orbital period: 17.915 h) 
