raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Galileo. We currently target 1.5.1, 1.6.1, 1.7.x, 1.8.1, and 1.9.1. <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… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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<_whitenotifier-9244> [Principia] pleroy closed pull request #2690: Support for changing the origin of a polynomial - https://git.io/JUvBo
<_whitenotifier-9244> [Principia] pleroy pushed 8 commits to master [+0/-0/±12] https://git.io/JUffd
<_whitenotifier-9244> [Principia] pleroy a654012 - Try to implement AtOrigin.
<_whitenotifier-9244> [Principia] pleroy c8ea95f - A better solution without multplications of multivectors by polynomials.
<_whitenotifier-9244> [Principia] pleroy 801481d - Something that compiles.
<_whitenotifier-9244> [Principia] ... and 5 more commits.
<_whitenotifier-9244> [Principia] pleroy opened pull request #2692: Adjust tolerances on Linux - https://git.io/JUfJf
<_whitenotifier-9244> [Principia] pleroy labeled pull request #2603: Automated primary detection - https://git.io/Jf99i
<discord-_> Z​eusbeer. — Reached an actual low orbit now, it should last 12-13 days 🙂
<discord-_> Z​eusbeer. — I guess the moon REALLY hates satellites
<discord-_> S​tonesmile. — Depends on the inclination, there are some inclinations that are more stable than others, google frozen orbits
<discord-_> S​tonesmile. — > Four frozen lunar orbits have been identified at 27°, 50°, 76°, and 86° inclination
<discord-_> S​tonesmile. — These depend on altitude of the orbit, but these are for LLO
<_whitenotifier-9244> [Principia] Pending. Build queued… - 
<_whitenotifier-9244> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4473/
<discord-_> Z​eusbeer. — interesting
<_whitenotifier-9244> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4473/
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<_whitenotifier-9244> [Principia] eggrobin labeled pull request #2692: Adjust tolerances on Linux - https://git.io/JUfJf
<_whitenotifier-9244> [Principia] pleroy closed pull request #2692: Adjust tolerances on Linux - https://git.io/JUfJf
<_whitenotifier-9244> [Principia] pleroy pushed 2 commits to master [+0/-0/±2] https://git.io/JUfk9
<_whitenotifier-9244> [Principia] pleroy 0d4f472 - Tolerances on Linux.
<_whitenotifier-9244> [Principia] pleroy 305720b - Merge pull request #2692 from pleroy/Linux Adjust tolerances on Linux
<discord-_> C​alvin_Maclure. — Does the Principia wiki explain what all the different reference planes are all about and how to use them?
<discord-_> S​tonesmile. — Yes
<discord-_> C​alvin_Maclure. — Do you need the Master branch for Gallois or not?
<discord-_> C​alvin_Maclure. — Just the ''regular'' release?
<discord-_> S​tonesmile. — The latest release is always found in the readme on GH
<discord-_> C​alvin_Maclure. — 👍
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<discord-_> e​gg. — @Zeusbeer @Stonesmile if you are willing to play with the eccentricity you can use much broader inclination ranges too, see https://discord.com/channels/319857228905447436/480397772248580098/728371462964248617
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<discord-_> C​alvin_Maclure. — Ok, so you Principia peoples, since I've only just started using this (amazing mod!), to be sure I haven't missed anything, this is an impact trajectory to the Moon, no?
<discord-_> l​pg. — I believe egg's position is that the Barycentric frames are useless and never to be used
<discord-_> Z​eusbeer. — try to use the most bottom plane for transfers (planets or moons)
<discord-_> l​pg. — in this case you want either the 2nd or 4th option
<discord-_> Z​eusbeer. — try to use the most bottom option for transfers (planets or moons) (edited)
<discord-_> l​pg. — if there's going to be an impact, it'll be obvious
<discord-_> C​alvin_Maclure. — Hmm... I thought (for some reason) barycenter was the way to go.
<discord-_> C​alvin_Maclure. — Why the 2nd or 4th?
<discord-_> Z​eusbeer. — try it, it's more like the general stock encouter view you'd get
<discord-_> l​pg. — because they're both from the point of view of the moon
<discord-_> C​alvin_Maclure. — There's very little change (in this case) when I go from 3rd to 4th
<discord-_> l​pg. — heck the 1st would do fine too, because the moon is tidally locked
<discord-_> C​alvin_Maclure. — > because they're both from the point of view of the moon
<discord-_> C​alvin_Maclure. — @lpg yes, taht's what I figured. Which makes sense
<discord-_> l​pg. — which is to say you picked exactly the wrong one 😛
<discord-_> C​alvin_Maclure. — lol! Thanks mate... appreciate the moral support
<discord-_> Z​eusbeer. — it's fine, generally you want to switch between the second and last window for most stuff, the first one is usefull for anything like geostationary work
<discord-_> C​alvin_Maclure. — So if the trajectory (dotted blue) is crossing through the Moon, but no impact suggestion is present, am I correct in understanding that you're'' right place wrong time'' for an imapct?
<discord-_> Z​eusbeer. — no not really, you really are just in the wrong visual plane then, or something is going wrong
<discord-_> Z​eusbeer. — no not really, you really are just in the wrong visual plane then, or something is going wrong, most of the time it should give a little explosion marker for collision (edited)
<discord-_> C​alvin_Maclure. — hmm....
<discord-_> Z​eusbeer. — i'll show you in a second, actually doing a direct descent moon mission right now
<discord-_> C​alvin_Maclure. — ok
<discord-_> C​alvin_Maclure. — I'm just very used to having the patched conics way of doing things. I'd always wait for the planes to align before launching
<discord-_> s​cimas. — Dotted blue line? The trajectory prediction is shown in magenta, history in green and the flight plan in dashed white colour, I don't know where you're seeing a dotted blue line.
<discord-_> l​pg. — the white is bluish
<discord-_> C​alvin_Maclure. — > Dotted blue line? The trajectory prediction is shown in magenta, history in green and the flight plan in dashed white colour, I don't know where you're seeing a dotted blue line.
<discord-_> C​alvin_Maclure. — @scimas sorry, dashed palle-ish blue
<discord-_> C​alvin_Maclure. — So... is plotting frame 2 better than 4?
<discord-_> l​pg. — that kinda looks like you didn't extend the flight plan long enough to actully reach the point of impact
<discord-_> l​pg. — but I do think sometimes the impact gets "forgotten"
<discord-_> C​alvin_Maclure. — Mine's on 11 days
<discord-_> Z​eusbeer. — no it is long enough, if I make it longer it shows nothing lol
<discord-_> s​cimas. — You don't see a collision in barycentric frame because, well, that's your motion relative to the barycenter of the system. It doesn't care about the surfaces of either Earth or Moon. It is also the reason you don't get apo/peri-apsis markers in that frame. As others pointed out, the first, second and the fourth frame all care about the actual bodies involved and as such are much more useful.
<discord-_> C​alvin_Maclure. — So... when TLI'ing, how much should one care about launching into the plane of the Moon's orbit?
<discord-_> B​uilderbast. — I use a kos script by butcher which tells me an inclination to launch to
<discord-_> B​uilderbast. — And then from that parking orbit you fire the engine at the descending/ascending node to intercept the moon
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<discord-_> C​alvin_Maclure. — There's got to be a simply way than using a KOS script (not that that's bad)
<discord-_> l​pg. — you can eyeball it. I still haven't managed to reliably eyeball anything other than near-polar launches
<discord-_> B​uilderbast. — Well basically theres always an inclination where the plane of your parking orbit is on the line between the center of the earth, the moon, and the space center
<discord-_> l​pg. — 'principia' and 'simple' don't really live in the same building
<discord-_> S​niper. — principia
<discord-_> B​uilderbast. — But even for me who had never used kos, the script is really very easy
<discord-_> B​uilderbast. — Just 2 commands and it youre set
<discord-_> B​uilderbast. — But even for me who had never used kos, the script is really very easy to use (edited)
<discord-_> C​alvin_Maclure. — > Just 2 commands and it youre set
<discord-_> C​alvin_Maclure. — @Builderbast this script you speak of, this is... available for public use?
<discord-_> B​uilderbast. — Most definitily, lemme find it real quick
<discord-_> B​uilderbast. — Most definitely, lemme find it real quick (edited)
<discord-_> B​uilderbast. — found it @Calvin_Maclure
<discord-_> C​alvin_Maclure. — Man... if only I knew how to do code!
<discord-_> B​uilderbast. — yeah same
<discord-_> B​uilderbast. — but nothing stops us from learning it right
<discord-_> B​uilderbast. — I kinda wish i'd learned to code these last few months
<discord-_> C​alvin_Maclure. — Yeah... but then again the time that I put into that will slow my YT channel down
<discord-_> C​alvin_Maclure. — Already struggling to put out 1 epi a week
<discord-_> B​uilderbast. — yeah no kidding, look at the amazing editing you do
<discord-_> B​uilderbast. — im impressed you can get those done in a week
<discord-_> C​alvin_Maclure. — Trying my best to get the whole Principia thing going since, well, episode 12 is... Moon stuff.. and stuff
<discord-_> B​uilderbast. — yeah im about there as well
<discord-_> B​uilderbast. — just had my first flyby
<discord-_> B​uilderbast. — I can't wait to start doing interplanetary in principia 🤪
<discord-_> C​alvin_Maclure. — I can't wait for people to see my... Atlas rocket...
<discord-_> C​alvin_Maclure. — That stage-1/2, though!
<discord-_> B​uilderbast. — I keep making atlas rockets in my careers, even though theyre so not practical
<discord-_> B​uilderbast. — I just really like the atlas for some reason
<discord-_> C​alvin_Maclure. — How are they not practical?
<discord-_> B​uilderbast. — Well cause of the stage and a half it cant use pvg, and i cant see accurate delta v stats in the vab
<discord-_> B​uilderbast. — Wait you use something else for ascent guidance right?
<discord-_> C​alvin_Maclure. — I've never had issues with that
<discord-_> C​alvin_Maclure. — Gravity Turn mod
<discord-_> B​uilderbast. — Ah yes
<discord-_> B​uilderbast. — Atlas is the only rocket i fly manually
<discord-_> B​uilderbast. — Or atleast, with smartass
<discord-_> B​uilderbast. — But in the vab it doesnt detect that you will seperste the booster engines, so it shows you Delta v numbers that are bogus
<discord-_> B​uilderbast. — And I use the vab delta v numbers to plan my missions
<discord-_> C​alvin_Maclure. — For some reason, I've never really been off in my numbers. There won't be that much of a difference, though.
<discord-_> B​uilderbast. — Wait i could make a desmos graph for its performance
<discord-_> n​9gaming. — Just wanted to mention with Principias new persistent rotation, the Dzhanibekov Effect can be seen which is super cool
<discord-_> C​alvin_Maclure. — This mod is next level
<discord-_> C​alvin_Maclure. — PhD stuff!
<discord-_> Z​eusbeer. — and to be honest, when you get used to it, it takes just about as much time as the stock game, sometimes even less time, while being way cooler! (except for when 2400 kicks in 😦 )
<discord-_> B​uilderbast. — I still dont like that timewarping at high speeds is so laggy
<discord-_> S​tonesmile. — Neither does NASA (they also integrate all of their trajectories)
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<discord-_> S​kylar. — 2400? @Zeusbeer
<discord-_> S​tonesmile. — Issue 2400 on principia's GH, saves getting large
<discord-_> S​kylar. — Ah
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<discord-_> B​utcher. — > And then from that parking orbit you fire the engine at the descending/ascending node to intercept the moon
<discord-_> B​utcher. — @Builderbast strictly the burn isn't necessarily at the nodes, its just somewhere on the orbit. But you should always get an easy intercept within one orbit.
<discord-_> B​utcher. — Also the script can be linked from my github.