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…
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[Principia] pleroy labeled pull request #3228: Pick up the Hamilton hotfix - https://git.io/JMb8z
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[Principia] pleroy synchronize pull request #3225: Use new-style DiscreteTrajectory in Entwurf - https://git.io/JMQNi
<queqiao-_>
⟨gravShark⟩ Getting back into the swing of principia playthroughs. what's the best in-game way to plan and set alarms for interplanetary transfers? the age old LEO satellite and mechjeb adv transfer method, TWP, Astrogator, something else?
<queqiao-_>
⟨Stonesmile⟩ There is a version of TWP linked in #ro-general That should work quite good, redoing the TWP calc close to the window might be a good idea
<queqiao-_>
⟨Zeusbeer⟩ I normally used kerbal alarm clock and just launched at the launch windows
<queqiao-_>
⟨Zeusbeer⟩ It works with principia too
<queqiao-_>
⟨lpg⟩ TWP works very well (including with principia), _except_ for fast transfers to outer planets. There's a bug (apparently to do with sun-hyperbolic trajectories) that makes it get the wrong answers for some trip durations
<queqiao-_>
⟨lpg⟩ (I've relied on MJ adv transfer planner for those)
<queqiao-_>
⟨Zeusbeer⟩ Are there any interesting orbits to put around Mars for missions?
<queqiao-_>
⟨Zeusbeer⟩ like in a real-life sense?
<queqiao-_>
⟨Stonesmile⟩ Maybe something that makes communication from the ground back to Earth better? The best I can think of for that would be a crepuscular sun synchronous orbit though
<queqiao-_>
⟨Stonesmile⟩ Ballistic capture at Mars maybe?
<queqiao-_>
⟨Vlood⟩ would an areostationary(?) orbit be feasible?
<queqiao-_>
⟨Stonesmile⟩ 17'032 km, so yes
<queqiao-_>
⟨Paculino (ŝi/ri/she/they)⟩ Wouldn't that take a long time and more delta-V than aerocapture??
<queqiao-_>
⟨Zeusbeer⟩ I had a paper a while ago that calculated delta V saves for using ballistic capture to get to phobos and Deimos
<queqiao-_>
⟨lpg⟩ deimos is at what, 20Mm? wonder if it's big enough to make trouble for areostationary sats
<queqiao-_>
⟨Paculino (ŝi/ri/she/they)⟩ For those, it makes since
<queqiao-_>
⟨Stonesmile⟩ You would probably never aerocapture IRL though, too risky
<queqiao-_>
⟨Paculino (ŝi/ri/she/they)⟩ The time frame issue may be present though
<queqiao-_>
⟨Stonesmile⟩ IIRC the transfer time isn't that bad, and you have more launch opportunities than a normal transfer I think
<queqiao-_>
⟨Zeusbeer⟩ Not sure, it's mass is really really really small compared to what the moon is
<queqiao-_>
⟨Zeusbeer⟩ I doubt it has any affects, maybe long term
<queqiao-_>
⟨Paculino (ŝi/ri/she/they)⟩ I did not consider the launch opportunities; that makes since
<queqiao-_>
⟨egg⟩ I would expect extended body effects to be a nightmare for synchronous orbits
<queqiao-_>
⟨egg⟩ Mars is very lumpy
<queqiao-_>
⟨egg⟩ And these effects already dominate around the fairly round earth
<queqiao-_>
⟨von Kerman⟩ Are these predictions usable? I think it assumes circular coplanar orbits. It might work for Venus, but what about the more inclined or eccentric planets?
<queqiao-_>
⟨Stonesmile⟩ Normal TWP does, but not the one in #ro-general
<queqiao-_>
⟨von Kerman⟩ No, i mean Kerbal alarm clock
<queqiao-_>
⟨Stonesmile⟩ Oh, that might be the same as normal TWP?
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<queqiao-_>
⟨von Kerman⟩ Oh, I see now, it's not about using KAC transfer window predictions, KAC is used just to set alarms for TWP launch windows. Sorry.
<queqiao-_>
⟨lpg⟩ ? that wouldn't make sense, TWP can set its own much nicer alarms
<queqiao-_>
⟨von Kerman⟩ I just need to start using TWP 🙂
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[Principia] pleroy synchronize pull request #3225: Use new-style DiscreteTrajectory in Entwurf - https://git.io/JMQNi