Killer Toilet
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From mars, launch into an orbit using the correct heading (azimuth) to reach phobos as its plane passes over your position. If you've used the DGIV autopilot, make sure to do a small burn after the program is finished so IMFD will use the right full-throttle setting to calculate a burn.
Then it's the exact same as going to the moon. Remember that Phobos does not have a very large mass ergo its gravity is not much. I'll fly from Mars-Phobos and confirm the method.
On Edit: Okay, so I just landed on Phobos (more like sunk into the mesh, as Orbiter assumes it is a sphere regardless of the model)
Olympus only has one solution for Phobos, 90 degrees when relative inclination is at its lowest.
Make sure when you plan to get to Phobos you have a PeA above the Martin atmosphere, adjust arrival time. My flight took about 10 simulated hours. Because the gravity of Phobos is so weak POI isn't an option. Instead I just waited till I got close, circularized my mars orbit (orbital tools program) to nullify the inertia of the transfer orbit then just started burning towards Phobos until my velocity vector put me on surface of Phobos. Then I just coasted until I was right above the moon, killed off my Phobos relative velocity using retro thrusts, and canceled out the altitude drop with hover thrust. All that was left to do was pick a landing site. Because of the weak gravity you can cruise around with RCS thrusters until you find a nice place to sink into the mesh.
Getting to Phobos isn't hard, but actually getting on Phobos isn't super easy (I may have flown it wrong though).
Thank you. I'll try that once I master the Lunar orbit transfer, and if I find a scenario that starts on Olympus Base. But then again, I need to work on landing that means something other than crashing into the object (which shouldn't be too hard).
EDIT: So I did land "correctly" on Jupiter right after the tutorial on how to get from Europa to Callisto. Surprisingly, it was easy for something that should be impossible in real life. Do all surface landings for planets with atmospheres have to be at around 0 degrees while using the airbrakes? If so, then I might have to use Jupiter to practice landing without crashing.
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