Schedule of Launch Windows
for Hohmann Transfer Orbits
| Departing from Mercury for ---------- Venus Earth Mars Jupiter |
Departing from Venus for Mercury ---------- Earth Mars Jupiter |
Departing from Earth for Mercury Venus ---------- Mars Jupiter |
Departing from Mars for Mercury Venus Earth ---------- Jupiter |
Departing from Jupiter for Mercury Venus Earth Mars ---------- |
These schedules were made from a Microsoft Excel spreadsheet
Hohmann.xls
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The spreadsheet includes all the planets from Neptune to Mercury.
Pluto is excluded because its tilted eccentric orbit is approximated
very badly by this sheet which assumes circular, coplanar orbits.
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Tangent Ellipse Transfer Orbits
NEW! (as of Sept. 25, 2001)
A spreadsheet for launch windows to elliptical orbits.
(This one is for Mars)
Hohmann.xls assumes circular destination orbits,
which can lead to substantial errors if the desitnation orbit
has some eccentricity (like Mars or an asteroid).
A nice discovery I made in the Mars spreadsheet:
A 2018 Mars trip that takes 214 days.
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Asteroid launch windows can be found
by inputting orbital elements into rows 2 and 3.
For asteroid 2009 OW6, it looks like there was an
August, 2009 trip that took 30 days.
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Caveat: spreadsheet assumes coplanar orbits,
so this won't work well with asteroids having a healthy inclination.
The spreadsheet also assumes a perihelion greater than 1 A.U.
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This pdf explains the math behind the tangent ellipse spreadsheet.
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Other space stuff by Hop David:
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| Conic Sections and Celestial Mechanics Coloring Book |
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Shotgun Orbital Simulators
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Delta Vee Map
A whimsicly illustrated delta vee map to some near earth destinations.
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The Case For Asteroids
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Kuck Mosquitoes
A way to retrieve asteroidal resources with unmanned spacecraft.
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Hop's Art Gallery
Please check out my painting and drawings.
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Hop's Deviant Art Gallery
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