mikejz, that is cool, I did not know that. M-E-M-V-E in 2014, very interesting.<br /><br />RadarRedux, that would be great data to have. If you can find it, I'll wager it was posted within the last 2 years, since I searched hi and low.<br /><br />I can calculate all the numbers you could need for any(*) trip to Mars, given the time of flight and a starting date. I can even plan the round trip for you.<br />(*) – except hyperbolic, which is less than about 25 days; also continuous thrust is not yet implemented.<br /><br />What you are asking about is the Hohmann flight time, this is the least energy but lowest energy cost flight, it is a relatively simple calculation.<br /><br />But I developed the software to calculate all the alternatives so I could point out to folks how <b>you can buy shorter trip times with not that much more deltaV</b>. So I hesitate to give you the numbers for Hohmann transfers, but oh what the heck. Just remember that people should get there faster than Hohmann.<br /><br />Hohmann transfers are almost always cited for equivalent circular orbits, but there ain’t no such thing in the real world, er solar system. Mars’ orbit is very eccentric which changes things a whole bunch, for one thing it requires you to find the correct launch window for a given time of flight. Folks should realize Hohmann transfer times vary quite a bit because the actual orbital radius at the time of arrival varies quite a bit.<br /><br />The following copy and paste results are completely corrected for eccentric orbits. I have very, very high confidence they are 100% correct, but they have never been independently verified.<br /><br />I should point out that plane changes are not accounted for – this leads to the implicit assumption that you have to depart Earth at just the right moment. Further, you have to be in the orbital plane around Earth that matches the plane Mars will be on when you arrive. This has significant logistics implications; the trade-offs could lead to a fun discu <div class="Discussion_UserSignature"> </div>