From my armchair I like the binary system theory best. One of the objects starts emitting when they approach each other. And occasionally the shining one is sha

From my armchair I like the binary system theory best. One of the objects starts emitting when they approach each other. And occasionally the shining one is shadowed behind the other so we don't see the burst. Would require one object to be much bigger though, so it could hide the other for half a minute out of 22 minutes, and this seems impossible to me.