> It takes ~3,000 m/s of dV to slow down, and do a powered landing on the Moon. With generous reserves, I guess. The speed on a low Moon orbit is about 1700 m/

> It takes ~3,000 m/s of dV to slow down, and do a powered landing on the Moon. With generous reserves, I guess. The speed on a low Moon orbit is about 1700 m/s, Apollo's LEMs had about (less than?) 2500 m/s delta-V for landing. > It takes takes ~6.400 m/s of dV to slow down, and do a powered landing on Mars. Seems too generous. Escape velocity for Mars is 5.027 km/s, so low orbital speed is about 3.6 km/s; more importantly, there is atmosphere - which maybe too thin to land safely on parachutes, but it definitely is going to reduce speed from orbital to some extent.