UmbralRaptor changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> … one of the other grad students just compared me to nomal O_o | <ferram4> I shall beat my problems to death with an engineer.
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<kmath> <astronomolly> Is it problematic if a kitty treat goes down the AC vent? #AskingForAKitty https://t.co/BuFpHQBrK2
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<egg|afk|egg> Iskierka: but if you put a RTL override in the middle, it also looks right
<egg|afk|egg> !u "\x202D)(\x202E()\x202D"
<Qboid> egg|afk|egg: Too many characters! (Maximum: 10)
<egg|afk|egg> !csharp "\x202D)(\x202E()\x202D"
<Qboid> ‭)(‮()‭
<egg|afk|egg> uh
* egg|afk|egg pokes things with a stick
<egg|afk|egg> !csharp "\x202D)abc(\x202E(abc)\x202D"
<Qboid> ‭)abc(‮(abc)‭
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<egg|afk|egg> that seems wrong
<egg|afk|egg> !csharp ")abc(\x202E(abc)"
<Qboid> )abc(‮(abc)
<egg|afk|egg> hmmm
<egg|afk|egg> !csharp ")abc(\x202E"+"def(abc)def"
<Qboid> )abc(‮def(abc)def
<egg|afk|egg> !csharp ")abc(\x202E"+"def(abc)ghi"
<Qboid> )abc(‮def(abc)ghi
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<egg|afk|egg> ah right
<egg|afk|egg> !csharp ")\x202E((\x202E)"
<Qboid> )‮((‮)
<egg|afk|egg> hmm
<egg|afk|egg> !csharp ")\x202E(\x202d(\x202E)"
<Qboid> )‮(‭(‮)
<egg|afk|egg> !csharp "\x202D)\x202E(\x202D(\x202E)\x202D"
<Qboid> ‭)‮(‭(‮)‭
<egg|afk|egg> !csharp "\x202E)\x202D(\x202E(\x202D)\x202E"
<Qboid> ‮)‭(‮(‭)‮
<egg|afk|egg> hmm
<egg|afk|egg> !csharp "\x202E)(\x202D()\x202E"
<Qboid> ‮)(‭()‮
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<egg|afk|egg> Iskierka: blarg, I can't seem to make it look right with bidi overrides
<egg|afk|egg> argh, missed a catstream too
<kmath> YouTube - Live Blue Tit Nest Camera
<egg|afk|egg> !wpn Norgg
* Qboid gives Norgg a pre-order loop space
<soundnfury> pre-order your loop space now!
<soundnfury> Only $5.99!
<soundnfury> And if you order now, we'll throw in this infinite exact sequence, absolutely free!
<egg|afk|egg> soundnfury: s/infinite/long
<Qboid> egg|afk|egg thinks soundnfury meant to say: And if you order now, we'll throw in this long exact sequence, absolutely free!
egg|afk|egg is now known as egg
egg is now known as uovo
uovo is now known as egg
<soundnfury> same thing
<soundnfury> anyway, gtg, it's cricket o'clock
<egg> cats!
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<egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a winter banhammer
<UmbralRaptor> Winter is... banning?
<egg> apparently
<egg> UmbralRaptor: also, my entry for the maccollo trajectory optimization challenge http://forum.kerbalspaceprogram.com/index.php?/topic/161390-principia-challenge-munar-retrograde-rendezvous-122/#comment-3087010
<egg> UmbralRaptor: WSB fun \o/
<egg> UmbralRaptor: do you have a good eggsplanation of the square retrograde orbit? http://forum.kerbalspaceprogram.com/index.php?/topic/161390-principia-challenge-munar-retrograde-rendezvous-122/#comment-3087024
<UmbralRaptor> egg: Unsure. Are there pics of it in a bunch of different reference frames?
<UmbralRaptor> egg: mainly I'm wondering in terms of a graph of, say, r' and theta'
<egg> UmbralRaptor: there are pics in different reference frames: KMB http://i.imgur.com/PEEAn9W.png, KCI http://i.imgur.com/sgDadPf.png, MCI http://i.imgur.com/OIoUz9G.png
<egg> UmbralRaptor: I don't know where Kerbin is when the ship is in the corners, I should perhaps investigate that?
<UmbralRaptor> I think so.
<UmbralRaptor> I think the corners are more or less apoapses?
<egg> UmbralRaptor: well they are by definition Mun apoapses
<egg> since it is a square in the nonrotating mun-centred frame
<egg> and the square is centred on the mun
<UmbralRaptor> Doh
<egg> UmbralRaptor: apsides are shown here http://i.imgur.com/OIoUz9G.png
<egg> UmbralRaptor: and Kerbin apsides here http://i.imgur.com/sgDadPf.png
<egg> so basically it's a distant retrograde orbit that has the same period as the Mun? or some other resonance?
<UmbralRaptor> Looks like it? https://i.imgur.com/sgDadPf.png
<UmbralRaptor> Or, some sort of rational fraction thereof.
<egg> yeah
<UmbralRaptor> # corners = 2*(period_Mun/period_spacecraft) ?
* UmbralRaptor wants to say that other polygons were found by maccollo?
<egg> yeah
<egg> maccollo is good at polygons
<egg> UmbralRaptor: here's a similar orbit, in all 3 reference frames https://youtu.be/9Aq8nYL03Ts?t=72
<kmath> YouTube - Principia shenanigans
<egg> UmbralRaptor: so in those square orbits, the corners occur when the Kerbin-Mun-spacecraft angle is right?
<egg> this is weird
<egg> !wpn bofh
* Qboid gives bofh a phase-locked quokka
<egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor an octanitrocubane capybara
<UmbralRaptor> Giant exploding marsupials!
<egg> UmbralRaptor: well the capybara isn't a marsupial
<UmbralRaptor> Hrm. Leading/trailing apoapses, radial periapses? (Is this the case always?)
<egg> but the quokka is, yes
<UmbralRaptor> oops.
<UmbralRaptor> Rodent.
<egg> it's a diprotondont!
<egg> like the diprotodon!
<egg> UmbralRaptor: yeah, in the MCI frame that seems to be the case
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<egg> UmbralRaptor: in the KCI frame things are understandable
<UmbralRaptor> !wpn tfool
* Qboid gives tfool a solderless dimetrodon
<tfool> o_o
<egg> (though iirc maccollo had made orbits where things were polygonal in both frames which was really confusing)
<egg> tbh most dimetrodons are solderless
<UmbralRaptor> Are the dimetrodons RoHS compliant?
* UmbralRaptor is mainly wondering to what extent the polgons are resonances, and maybe longitude of periapsis dependent.
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<egg> UmbralRaptor: what do you mean?
<UmbralRaptor> (I, uh, assume that all are low inclination relative to the plane of the Mun's orbit?)
<egg> yeah, it's all essentially the CR3BP
<UmbralRaptor> CR3BP?
<UmbralRaptor> (Specifically the C -- circular?)
<egg> CR3BP?
<egg> CRTBP?
<Qboid> egg: [CRTBP] => Circular-Restricted Three-Body Problem
<egg> UmbralRaptor: the Mun is in a circular orbit
<egg> and the whole thing stays in the plane, yes
<UmbralRaptor> !acr -add:CR3BP Circular-Restricted 3-Body Problem
<Qboid> UmbralRaptor: I added the explanation for this acronym.
<UmbralRaptor> As for other questions, can you have apoapsis in line with Kerbin-Mun, and if so do you get an interesting shape?
* egg does not know
* egg will try
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<egg> UmbralRaptor: I don't think you can have your apoapsides in the radial direction
<egg> UmbralRaptor: there's the unstable L1-L2 weird paragraph-sign-shaped orbit
<egg> but that's unstable
<egg> whereas the maccollo polygons are stable
<UmbralRaptor> hm
<egg> UmbralRaptor: not sure why, but I manage to make sense of this orbit in the KCI and KMB frames sortof, but that square in the MCI frame is freaky
<egg> UmbralRaptor: anyway, if you come up with a reasonable half-eggsplanation feel free to answer that forum question
<UmbralRaptor> Something something resonances?
<egg> UmbralRaptor: eggsactly :-p
<egg> UmbralRaptor: it's really maccollo's orbit, not mine (see the OP)
<egg> UmbralRaptor: oh, I like your sig :-p
<UmbralRaptor> :D
<egg> UmbralRaptor: I have plans for reunification though https://github.com/mockingbirdnest/Principia/issues/1413#issuecomment-306069907
<Qboid> [#1413] title: Some stock bodies have peaks that are higher than the time warp limit | For example, Minmus highest points are around 5-6 km, but the timewarp limit is 3 km, making landing at these locations impossible with Principia.... | https://github.com/mockingbirdnest/Principia/issues/1413
<egg> ferram4: plans for reunification of the ferram4 and egg sectors! (you use AddForce and the like, right, not directly Unity forces?)
<egg> UmbralRaptor: Mr. Kármán, tear down this line!
<kmath> <civilwarbore> @biotweeps @AnneWHilborn On dogs nose hair runs from nose leather towards skull, on cats it's the reverse until you… https://t.co/ELeawoi4W5
<UmbralRaptor> kitty! doggy!
<egg> I wonder which is the ancestral trait
* egg cannot check on self for obvious reasons
* egg is an egg
<UmbralRaptor> But what sort of egg? Monotreme? Bird?
* egg doesn't know
<kmath> <barrelshifter> Good boy spotting at WWDC https://t.co/iV93arFMS6
<ferram4> egg: Yeah, I use AddForce.
<egg> ferram4: so once we support rotating frame we can coexist
<egg> s/ex/eggs
<Qboid> egg meant to say: ferram4: so once we support rotating frame we can coeggsist
<egg> (we still have to relinquish our control when the craft touches something that touches the ground, but this should make ascent much nicer)
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<egg|nomz|egg> UmbralRaptor: yup, I linked it here already I think :D
<egg|nomz|egg> very cute indeed :D
<UmbralRaptor> Yep
<egg|nomz|egg> UmbralRaptor: "reversing where the apses are makes the orbit unstable" << it's more "nonexistent", the thing that exists is jumping between L1 and L2 but that hardly looks like the same kind of orbit, more like a paragraph sign of sorts
<UmbralRaptor> hrm
<UmbralRaptor> I feel like you should post a pic in that thread.
<UmbralRaptor> (Also, what happens with shorter period orbits, if anything?)
<egg|nomz|egg> UmbralRaptor: with sufficiently short periods they're Keplerian precesssing
<egg|nomz|egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a spring tesseral modem
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<UmbralRaptor> hrm
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<UmbralRaptor> For a lack of better description, sort of like how GR makes orbits precess, then do weird loops and whirls?
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<egg> UmbralRaptor: ?
<egg> !wpn Norgg
* Qboid gives Norgg a venomous Principia
<egg> hah
<egg> UmbralRaptor: well not really, here it gets nuttier as you go further out, and the nuttiness is rather different from that
<egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a reactive solenoid
<UmbralRaptor> !wpn egg
* Qboid gives egg a hexaflexagon
<UmbralRaptor> !!
<egg> !
<egg> (bob from observatorycats)
<UmbralRaptor> Bob appears ready to pounce on whomever is holding the camera.
<egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a gold Mandelbrot triangle
<egg> live dinosaur sleeping https://www.youtube.com/watch?v=h4AGzHrYDPI
<kmath> YouTube - Live Blue Tit Nest Camera
<egg> UmbralRaptor: lions also have the hair going down the nose, so it's at least felids; now I need to find a hyena nose pic to see if it's all feliformes http://photorator.com/photos/images/african-lion-nose--9087.jpg
<egg> (obvious solution: find a hyena, pet the hyena on the nose)
<egg> but it certainly looks much doggier
<egg> synapsid!
<UmbralRaptor> Kitty!
<UmbralRaptor> (well, lynx)
<egg> have I linked this here before? http://www.irregularwebcomic.net/2339.html
<Iskierka> ... if the pieces aren't manipulated after cutting how can you gain a sphere of the same size? Surely they're the wrong shape?
<Iskierka> ... I'm reading the explanation and just thinking "okay, but you said five pieces. If you allowed infinite cuts I'd be buying it, but not five"
<egg> Iskierka: well, not "cuts", but five subsets
<egg> rigid subsets