Use at your own risk.īasic Hohmann Mission Spreadsheet (format Libre Office Calc ODS): Same spreadsheet as above, but in Libre Office format. This spreadsheet was written by me and possibly contains mistakes. For an easy explanation of Vinf, go here.īasic Hohmann Mission Spreadsheet (format Microsoft Excel 97-2003 XLS): For a Hohmann trip from low orbit around Planet Start to low orbit around Planet Dest, calculate total delta-V, Transit time, time delay between launch windows, and time delay between arrival and launch window opening for return trip. It uses a concept called hyperbola's velocity at infinity or Vinf. By Ian Mallett.ĮasyPorkchop: Calculate "pork-chop" or C3 plot for various missions, so you can chose a mission within the delta-V capacity of your spacecraft. Orbital Energy: Calculate the orbital energy required to launch a payload from the surface into the desired orbit. There are some simplifications which reduce the accuracy a bit, read the docs at the "BOTE Python library" link under "Limitations" for details. It is basically a wrapper around Erik Max Francis' BOTE Python library. It can also calculate propagation delay due to the absolute speed of light between planets and moons.īack-of-the-envelope Orbital Transfer Calculator is an on-line calculator for Hohmann trajectories (only) created by Pete Wildsmith. It can calculate ballistic transfers between planets and moons, and powered (constant acceleration) transfers between stars (including effects of relativity). Planetary Transfer Calculator: This is impressive! It calculates various types of transfers (including torchship brachistochrone transfers).
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