egg changed the topic of #principia to: Logs: https://esper.irclog.whitequark.org/principia | <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly…
<queqiao->
⟨Quadrupole⟩ Is that earth and moon?
<raptop>
Assuming those numbers are meters, they're about right for EARTHMOO
<kitty>
> moo
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<queqiao->
⟨(ᴇxᴘᴇʀɪᴍᴇɴᴛᴀʟshells)⟩ ... meow?
<raptop>
chirp!
* raptop
pets experimentalshells
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<queqiao->
⟨sichelgaita⟩ We were puzzled by the motion of the L4/L5 bubbles. We believe that they are due to the Sun. A tidal effect of sorts. This was our daily "what you read in textbooks is only vaguely related to reality".
<queqiao->
⟨Sumguy⟩ But what’s the timescale?
<queqiao->
⟨Quadrupole⟩ I guess the oscillation period of the figure is one (anomalistic) month
<queqiao->
⟨Sumguy⟩ It could also be because of Jupiter… maybe
<queqiao->
⟨egg⟩ yeah, it’s one month.
<queqiao->
⟨Sumguy⟩ Earth month?
<queqiao->
⟨Quadrupole⟩ The sun's position shouldn't change much in two months
<queqiao->
⟨egg⟩ 30 days.
<queqiao->
⟨egg⟩ yes it does, in the reference frame that fixes the direction of the moon.
<queqiao->
⟨Sumguy⟩ Huh
<queqiao->
⟨egg⟩ the sun revolves around the Earth
<queqiao->
⟨egg⟩ the moon, on the other hand, just moves back and forth
<queqiao->
⟨egg⟩ the sun revolves around the Earth monthly
<queqiao->
⟨sciencecompliance⟩ I'm wondering if someone knows: when tidally locked moons' orbits precess around the normal vector to the respective Laplace plane, does the moon's rotational pole roughly follow the osculating orbital pole? I understand libration is a thing, just curious if the average or smoothed effect is the pole basically always taking the same direction as the osculating orbit or if it's more like the moon's pole generally stays...
<queqiao->
... pointed in the direction of the Laplace plane normal.
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<queqiao->
⟨sunnypunny⟩ sorry if this is against the rules but principia is the greatest ksp mod of all time