# Will the Tesla Roadster/Falcon 9H 2nd stage ever be a navigation hazard to cis-lunar space?

The saying "What goes around, comes around" can apply to spacecraft on ballistic trajectories that are launched from Earth into bound heliocentric orbits. Since the Tesla Roadster/Falcon 9H 2nd stage's orbit will repeatedly pass by Earth's orbit, will it ever be a navigation hazard to cis-lunar space? In addition to satellites in LEO, there are plenty of goodies in MEO (e.g. GPS/GNSS) and GEO.

I am not asking about the likelihood of a collision, because that is low. But a navigation hazard requires significant time and effort to monitor to be sure, and so any near passes to Earth would have to be carefully considered.

Given that launch generally (and by treaty) requires government approval, I wonder if they were required to consider this and take the necessary steps to avoid it?

See for example:

• Scott Manley's new video after 05:40 which mentions a close approach to Earth in the year 2030.
• Max Fagin's video after 02:00 which mentions a possible use of a perturbation from a near approach to Mars to prevent future intercepts with Earth's orbit.

below: From here. Open in another view for full size.

• I could be wrong on this. For the first paet of the question, the two are, IMO, large enough to track at relatively less effort than unknown NEO. Particularly as far smaller bodies are tracked in lower orbits. – Everyone Feb 8 '18 at 6:33
• 17,759 near-earth objects of at least a meter in size are known and many more are not; the Roadster therefore can increase the (already negligible) navigation hazard by less than five one-thousandths of a percent. It's also almost just as likely to collide with another NEO in such a way as to prevent a future collision that would have occurred without it as to collide with an interplanetary spacecraft. en.wikipedia.org/wiki/Near-Earth_object#Near-Earth_asteroids hashtagspaceisbig – Russell Borogove Feb 14 '18 at 23:35