# When will SpaceX Falcon Heavy Tesla cross Mars orbit?

Elon Musk clearly miscommunicated here. The Tesla is going to take awhile to cross Mars orbit. When will that be?

note: to future readers, the shape of the orbit shown in this tweet is no longer believed to be even close to correct. See answer(s) below for details on that.

Using Horizons and a short Python script to plot it, I get the crossing about 154 days after 2018-Feb-08, or 2018-Jul-12. Coordinates are referenced to Roadster's projected position on JD=2458311.5. The thick red line is Mars' orbit and the thinner line is the Roadster projection, with dots at 145, 150, 155, and 160 days after 2018-Feb-08.