The recent CAST launch history is saying that SY-7 consits of two separate payloads SY-7A and SY-7B. Could it be that Object A and the separated Object J represent those pair? What do we know about the movement of Object J?
Philip, My educated guess on who is who in 2013-037 is as follows:2013-037A = 39208 = Tansuo-4A = Shiyan-7A with the manipulator2013-037J = 39357 = Tansuo-4B = Shiyan-7B as a test object for manipulator testing2013-037C = 39210 = Tansuo-5 = Shijian-15, a long-living manoeuverable inspector bird2013-037B = 39209 = Tansuo-3 = Chuangxin-3 which is not a comsat but a MSX-type satellite observerIgor