Delta-v

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ODelta-v (∆v), "∆" meaning "change" and "v" meaning "velocity", is a measure of the impulse that is needed to perform a maneuver such as a launch from, landing on a planet or moon, or in-space orbital maneuver.

Delta-V can be calculated using the Tsiolkovsky equation:

$\Delta v=\left(v_{e}:=I_{sp}*g_{0}\right)*\ln {\left({\frac {m_{0}}{m_{f}}}\right)}$

Where:

• $v_e$is effective exhaust velocity
  • $I_{sp}$ is specific impulse
  • $g_0$ is standard gravity (9.80665 m/s²)

• $\ln$ is the natural logarithm
• $m_0$ is total mass of a rocket
• $m_f$ is total mass without fuel (dry weight)

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This map shows the ∆v and manoeuvres required to reach different planets in Spaceflight Simulator. It is not 100% accurate.

Delta-v map for Spaceflight Simulator

Destination	Delta-v required (m/s)
Low earth orbit (starting point)	1665
Earth orbit (550 km)	???
Moon	665
Moon orbit	820
Earth escape	681
Mars transfer	765
Mars orbit	1205
Phobos orbit	1110
Deimos orbit	1040
Venus transfer	740
Venus orbit	1435
Direct Mercury transfer	1120
Mercury orbit	2705
Jupiter transfer	1335
Callisto	2675
Ganymede	3020
Europa	3552
Io	3855
Low Jupiter orbit	5200
Interstellar travel (no gravity assists)	1850+