01:20 <queqiao-> ⟨Al₂Me₆⟩ https://matrix.mockingbirdnest.com/_matrix/media/r0/download/matrix.mockingbirdnest.com/QrLOMwBatAhvKsmEiyWLlnpo/nodal_precession.gif

01:20 <queqiao-> ⟨Al₂Me₆⟩ So apparently I fell down the of making Blender animations. Comments welcome.

01:21 <queqiao-> ⟨Al₂Me₆⟩ (The nodal precession of the Moon's orbit, with period 18.6 years. AKA why you can't launch into the plane of the moon from the Cape.)

15:09 <queqiao-> ⟨syriantacobell⟩ Ooooh so that’s why PVG always has a stroke when I launch into the plane of the moon. Which arises a question… how do I get into the plane of the moon efficiently from the cape? Is the drifting maneuver the only way?

15:13 <queqiao-> ⟨egg⟩ ⟪Al₂Me₆⟫ So apparently I fell down the […] ⮪ How is the orientation of the Earth chosen? (That is, are you making it look worse than it is by having the Earth turned the wrong way for some part of the cycle?)

15:16 <queqiao-> ⟨Al₂Me₆⟩ Arbitrarily, but fixed (in particular, the tilt is pointed toward the Sun). The purple line is the latitude of the Cape and the green noodle is the lowest-inclination-relative-to-the-ecliptic orbit that can be reached from the Cape. I _think_ that should be valid for the purposes of this demonstration?

15:16 <queqiao-> ⟨vlood⟩ ⟪syriantacobell⟫ Ooooh so that’s why PVG always has a […] ⮪ The answer is much simpler: you don't.

15:16 <queqiao-> ⟨Al₂Me₆⟩ (Yes. And the point of the graphic is to insinuate that a more advanced transfer is required. Hence the existence of Lunar Transfer Planner.)

15:18 <queqiao-> ⟨syriantacobell⟩ ⟪vlood⟫ The answer is much simpler: you don't. ⮪ Makes sense. LTP I assume, works with principia. 👍🏼

15:18 <queqiao-> ⟨egg⟩ ⟪Al₂Me₆⟫ Arbitrarily, but fixed (in particular, […] ⮪ I mean how the earth is rotated around its axis, not where the axis is pointing. It looks like the cape is at the lowest point with respect to the ecliptic; but that does not put it at the lowest point with respect to the plane of the moon, which is where you would want it to be to see the actual distance between the cape and the plane of the moon, right?

15:21 <queqiao-> ⟨Al₂Me₆⟩ Hm, yeah. Let me try to produce a better version.

16:30 <_whitenotifier-1adf> [Principia] pleroy closed pull request #3738: An optimizer to tweak a manœuvre to fly at a certain distance from a celestial - https://github.com/mockingbirdnest/Principia/pull/3738