Explorable
Compute a transfer orbit live
Pick two planets or drag the orbit sizes and see the burns, the travel time, the launch-day angle and how often the chance comes round for an ideal Hohmann transfer.
TOTAL BURNS (SUN’S FRAME)5.59 km/s
BURN AT START2.95 km/s
BURN AT ARRIVAL2.65 km/s
TRAVEL TIME259 d · 8.5 mo
MARS AT LAUNCH44° ahead
LAUNCH CHANCE EVERY780 d
BURN FROM 407 km EARTH ORBIT3.57 km/s
The physics, the assumptions behind this tool and the sources are explained in One wrong unit: how we navigate to Mars, and how we once lost a spacecraft.