UmbralRaptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Fermat. We currently target 1.5.1, 1.6.1, and 1.7.2. <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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<discord-_>
Starwaster. — @Kobymaru what non rotating ref navball?
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<discord-_>
Acer_Saccharum. — You mean a celestial navball?
<discord-_>
neph. — Inertial solar?
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<_whitenotifier-5dfc>
[Principia] pleroy synchronize pull request #2250: A test of the precession of a symmetric top - https://git.io/fjyv4
<discord-_>
Kobymaru. — "When using RealSolarSystem the separation between the colours is parallel to the equator of the Earth and the line from the ♈︎ marker to the 12 marker is parallel to the line joining the Spring and Autumn equinoxes."
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<discord-_>
kostor. — principia mod is that mod that adds numeric calculations to trajectories isn't it? is it working well with RO on KSP 1.6.1?
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<UmbralRaptop>
trajectories outside of timewarp have always been numeric. Principia adds n-body gravity
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<discord-_>
kostor. — ohh right
<discord-_>
kostor. — oh wait i'm letting a bot know he's correcting me 🤦
<discord-_>
kostor. — oh wait i'm letting a bot know it's correcting me 🤦 (edited)
<UmbralRaptop>
… the bot just connects you to an IRC channel
<UmbralRaptop>
There's an actual bird^H^H^H^Hperson on the other end.
<discord-_>
kostor. — How do I know who am I talking to if there is 1 bot for an entire channel?
<discord-_>
lpg. — "UmbralRaptop." is the person
<discord-_>
kostor. — ohh cool. thanks!
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<discord-_>
kostor. — so does it work well with RO+RSS+RP1?
<UmbralRaptop>
It should. Certainly it has configs explicitly for RO&RSS
<discord-_>
kostor. — Thanks! I'll try it
<UmbralRaptop>
Better than stock KSP anyway, where egg had to move around Jool's moons
<discord-_>
kostor. — It's funny squad made a realistically unstable solar system
<discord-_>
kostor. — does it work with a orbit decaying mod? is there one?
<UmbralRaptop>
I mean, part of that was gameplay reasons, and part of it was Squad messing up.
<UmbralRaptop>
(They got the resonance wrong, but also Jool is a light Saturn orbited by 3 terrestrial planets)
<UmbralRaptop>
IIRC, there is one, but it doesn't play nice with Principia
<discord-_>
kostor. — Shame. I wonder if they'll consider adding that feature
<discord-_>
kostor. — but it's really off-topic for this mod
<discord-_>
lpg. — doesn't Principia make an orbital decay mod redundant?
<discord-_>
kostor. — Did you encounter a natural re-entry after parking in an orbit?
<discord-_>
Sir Mortimer. — depends on the orbit. if you're used to stock KSP, you might find your probes falling down because your orbits precess. a LOT.
<discord-_>
kostor. — IIRC it's atmospheric drag that is the biggest contributor to deorbiting
<UmbralRaptop>
Well, Principia doesn't model the Yarkovsky effect
<discord-_>
Sir Mortimer. — put anything in a 100km mun orbit and you'll not going to worry about deorbiting debris any time soon
<discord-_>
kostor. — it's funny because I heard that under 15km it is impossible to sustain a lunar orbit due to chaotic gravity field
<discord-_>
kostor. — I hope there will be a mod to better simulate these kind of stuff
<discord-_>
Sir Mortimer. — oh, right. RSS.
<discord-_>
Sir Mortimer. — mun != moon
<discord-_>
kostor. — Oh yeah! that's a misunderstanding
<discord-_>
kostor. — but actually I was hoping for deorbiting
<discord-_>
Sir Mortimer. — I never used RSS, so... what principia does for moon are mascons that really mess with your orbits. earth too. so unless you know what you're doing, probes will lithobrake.
<UmbralRaptop>
The lunar masscons are there IIRC
<discord-_>
Sir Mortimer. — yep, I think moon and earth.
<discord-_>
kostor. — wow! did not expect that
<discord-_>
kostor. — thanks for the info! I'll try it tomorrow. good night 😃
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<egg|zzz|egg>
Sir Mortimer: well, put something in a low lunar orbit and you'll experience the selenopotential, which is also fun
<egg|zzz|egg>
the geopotential isn't that bad, it will perturb orbits (J2 will do so massively, the other ones will mainly mess with geosynch stuff) but won't throw you to the ground in practice
<egg|zzz|egg>
we have neither radiation pressure nor atmospheric drag so you get to ignore the really messy stuff
<UmbralRaptop>
Modeling the YORP effect would be very, uh, Fun
<egg|zzz|egg>
well, ЯΟРP is about spin, it would only have indirect effect on the trajectory