I honeslty don't know. I have never really studied the issue after reading 100% of ZetaTalk.com After reading all the info there (and it's a lot), I found I was not convinced of this passing occurring either. I agree with you about it coming and going, but unlikely every 3550 years (or thereabouts).
As for the object in question.... it certainly is a strange object that could very well be the infamous Nibiru being referred to. Wish I knew. I too wonder why it takes so long to get here.... especially if we're "STALLED" in our orbit, as the Zetas say. Maybe it is here and it's just cruising around a bit before heading in our general direction.... lol
Gosh, I honestly don't know.
BUT, with all the large, earth-size BALLS/UFOS around the sun, that have been photographed by amateur and professionals alike... and then all the strangeness of those objects hanging around .... maybe this winged globe is actually a planetary mothership.... and the other objects are but space balls.........
...well, I'm just another SPACE GHOST!