UmbralRaptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is 🐇. We currently target 1.5.1, 1.6.1, and 1.7.x. <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…
<discord-> G​regrox. — @egg a mod I'm calling CloseApproach. (the thing we're testing)
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<discord-> G​regrox. — @egg there's also still a principia bug where whenever gravitational acceleration diverges from the keplerian orbit enough, the game thinks the spacecraft is accelerating, and will not allow timewarp
<discord-> e​gg. — hm
<discord-> e​gg. — has that bug been reported
<discord-> G​regrox. — for instance I'm in kerbin's soi (according to camera switching) but since the main gravitational impact is from Laythe, it's behaving oddly
<discord-> G​regrox. — I don't know, I can submit a report
<discord-> e​gg. — if you want it to be resolved (or at least investigated), that sounds like an idea
<discord-> e​gg. — when was your apocalypse?
<discord-> e​gg. — those approaches are really disturbingly close
<discord-> G​regrox. — 90 days in
<discord-> G​regrox. — but not at all with the 1 sec integrator step size
<discord-> e​gg. — okay so it's definitely gone here, I'm at 3 years and something
<discord-> G​regrox. — yep, I sent you the 1 sec integrator
<discord-> G​regrox. — omg I just passed through laythe's atmo like it was nothing because of the soi think
<discord-> G​regrox. — good news is soi doesn't mean too much so I can just limit it and the gravity will behave the same
<discord-> e​gg. — so it looks like the orbits go up and down
<discord-> e​gg. — feeling too lazy to plot elements or do deeper analysis than staring at the trajectories
<discord-> e​gg. — what's the roche limit for Kerbin & Laythe?
<discord-> G​regrox. — should be around 2.5 Kerbin radii
<discord-> G​regrox. — though for objects so similar in mass, it gets more complicated I believe.
<discord-> e​gg. — @Gregrox Laythe gets a lot larger in the sky from one day to the next, this is quite fun
<discord-> G​regrox. — I intend to tide lock these two
<discord-> G​regrox. — But haven't gotten around to it yet
<discord-> e​gg. — hm
<discord-> e​gg. — I wonder whether they would be though
<discord-> G​regrox. — Hmm good point
<discord-> e​gg. — the close approaches will lead to pretty massive tides
<discord-> G​regrox. — They should be pretty chaotic
<discord-> e​gg. — not necessarily
<discord-> e​gg. — the thing with chaos is that it tends to not last in a stable state all that long
<discord-> e​gg. — so this might settle into some resonance or something, depending on the frequency of the close approaches
<discord-> G​regrox. — lmao I just noticed I gave Kerbin a rotation period of like an hour for some reason
<discord-> G​regrox. — oh I think I see
<discord-> G​regrox. — it's because of a weird combo of reparenting kerbin with post spawn orbit, and kerbin using solar day by default
<discord-> G​regrox. — maybe their rotation period would be somehow based on their synodic period
<discord-> G​regrox. — time between approaches
<discord-> G​regrox. — new version @egg with fixed rotation periods.
<discord-> G​regrox. — (the 1 hr rotation period made launching from kerbin too easy and I was wondering why the kerbal x climbed so easily lol)
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<discord-> A​cer_Saccharum. — is this all for a new planet pack or just experiments with principia? @ Gregrox#4105
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<discord-> G​regrox. — both
<discord-> G​regrox. — right now it's experiments
<discord-> G​regrox. — but I intend to perhaps make this into an RSS-scale "Alternis RSS" pack
<discord-> G​regrox. — this time presented as an alternate history where Jupiter migrated inwards late in the system's formation and captured Venus and Earth.
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<discord-> n​eph. — good god as a geologist I just want to say that earth would be completely unrecognizable in any scenario where that would have been possible
<discord-> A​cer_Saccharum. — the tidal effects would possibly bake all the CO2 out of the earth's limestone/marble, turning it into venus 2
<discord-> A​cer_Saccharum. — it might make more sense for earth, venus, and mars equivalents to have co-accreted along with a roughly earth-distance jupiter
<discord-> A​cer_Saccharum. — it might make more sense for earth, venus, and mars equivalents to have co-accreted around a roughly earth-distance jupiter (edited)
<discord-> A​cer_Saccharum. — it might make more sense for earth, venus, and mars equivalents to have co-accreted around a roughly earth-distance jupiter (maybe 1.15 AU to counter tidal warming) (edited)
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<discord-> S​ir Mortimer. — btw @egg i've been working a bit on the technical foundation for the satellite missions. most importantly an extension to ContractConfigurator that can interact with Kerbalism to see if an experiment is currently running on a satellite or not (a concept that doesn't even exist in a stock KSP game)
<discord-> e​gg. — Oh nice
<discord-> S​ir Mortimer. — https://github.com/Kerbalism/KerbalismContracts
<discord-> e​gg. — I kinda dropped the ball on that over the past months, I'll try to spend some time looking at this stuff in the coming weeks
<discord-> D​amien. — yeah we've just been chatting on the kerbalism discord about cool satellite missions
<discord-> D​amien. — like a CME detection system
<discord-> D​amien. — keeping a satellite supported with a datalink and stationkeeping etc
<discord-> S​ir Mortimer. — @egg tbh the stuff that already is on the wiki will keep me occupied for a good while. there are a couple of missions that probably could pe put into a contract system with relative ease
<discord-> S​ir Mortimer. — that said, I'll have to pick a bone or two with ContractConfigurator. It's notoriously grumpy when it should look at unloaded vessels.
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<discord-> e​gg. — 🦴
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<discord-> G​regrox. — now let's see if I can reproduce the behavior I saw in Universe Sandbox when the planets aren't coplanar, where the inclination increases over time and the orbit direction tumbles end-over-end
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<discord-> G​regrox. — oh it's definitely happening here
<discord-> G​regrox. — both planets inclinations are being changed in the same direction
<discord-> e​gg. — oh, is this the Лидов–古在 mechanism?
<discord-> e​gg. — cc UmbralRaptor
<discord-> G​regrox. — please use latinized words
<discord-> G​regrox. — I can't read that
<discord-> G​regrox. — I mean
<discord-> e​gg. — Lidoff-Kozai
<discord-> G​regrox. — I am familiar with the kozai mechanism
<discord-> e​gg. — yeah that's it
<discord-> G​regrox. — which trades inclination for eccentricity and vice versa
<discord-> G​regrox. — the ecc is remaining low though
<discord-> e​gg. — hm
<discord-> G​regrox. — wait
<UmbralRaptop> egg|zzz|egg: I was not thinking of it, but maybe.
<discord-> G​regrox. — maybe not?
<UmbralRaptop> oh
<discord-> G​regrox. — there's no orbit analysis option for planets :v
<discord-> G​regrox. — no no look
<discord-> G​regrox. — that's eccentric
<discord-> G​regrox. — just normal kozai mechanism here
<discord-> G​regrox. — not sure if there was eccentricity increase in my US2 model but I trust principia more than US2 anyway
<discord-> G​regrox. — it looks like kerbin's orbit isn't changing as much
<discord-> G​regrox. — and masses of venus/earth > laythe/kerbin
<discord-> G​regrox. — so maybe the ecc change is affecting the least massive body, and doing it much more to laythe than venus
<discord-> G​regrox. — ecc of Laythe does seem to be oscillating
<discord-> G​regrox. — actually looks like inc is too
<discord-> G​regrox. — in the US2 model the orbits ended up just totally backwards
<discord-> G​regrox. — as if you turned your camera upside down
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