05:46 <queqiao-> ⟨K​itty⟩ Oh heck yeah, to anyone reading this on Matrix with a compatible client I figured out how to copy and paste maths from wikipedia into $\LaTeX$ uwu

05:46 <queqiao-> ⟨K​itty⟩ $\Delta v = v_\text{e} \ln \frac{m_0}{m_f} = I_\text{sp} g_0 \ln \frac{m_0}{m_f}$ for me (and anyone else with a client that supports it) this should display as an inline Tsiolkovsky rocket equation

05:47 <queqiao-> ⟨K​itty⟩ I was previously writing such things manually because I am an idiot lol

05:50 <raptop> Which is probably silly, since I don't know how bar_\text{foo} is different from bar_{foo}

05:50 <queqiao-> ⟨K​itty⟩ I just copied it how wikipedia has theirs displayed lol https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

05:50 <raptop> ah

05:51 <queqiao-> ⟨K​itty⟩ but ye I feel that xD

05:52 <queqiao-> ⟨K​itty⟩ I wish it was standard for every client (including somehow terminal ones, has anyone managed that?) of every text method to support $\LaTeX$ lol

05:54 <raptop> Things that no one wants to admit: you can actually read raw LaTeX

05:55 <queqiao-> ⟨K​itty⟩ lol, true. It does get a bit messier for longer stuff tho

05:56 <raptop> well, yes

08:43 <queqiao-> ⟨e​gg⟩ meanwhile I have an urge to rewrite that as Δv=I_sp m₀/m_f, and say the g₀ is part of the unit s g₀

08:45 <queqiao-> ⟨e​gg⟩ sometimes specific impulses are quoted in N s / kg

09:39 <queqiao-> ⟨(​ᴇxᴘᴇʀɪᴍᴇɴᴛᴀʟshells)⟩ as they *should* be

14:40 <raptop> g_0 is always fun because of how you have to explain to newbies that it's the same on the Mün and Kerbin

15:10 <queqiao-> ⟨Z​eusbeer⟩ With enough approximation it doesn't matter 😂

15:11 <queqiao-> ⟨e​gg⟩ (I’d be fine with giving specific impulses in kgf s / kg (or lbf s / lb), odd units can make sense in some domains, but messing with the dimensional analysis is just evil)

16:42 <queqiao-> ⟨Z​eusbeer⟩ Slugs/ft^3 💩

17:05 <raptop> zeusbeer: confusingly, also a measure of what's going on in a garden

17:11 <queqiao-> ⟨D​amien⟩ https://lh3.googleusercontent.com/F3m5aNujia_dpLtEMPDz0fGxxOHLNw8guOrA9SkbtXjjQqsE7a7mEcu924K8-uSjfqtUuSOUiWxYJJSswdFNhUuo-PKQ3t9eZ-WOBw9DMdKLT1HDNUXjFdgH5A_rKoy9-Bk52cng

17:11 <queqiao-> ⟨D​amien⟩ @egg principia gui diagram when

17:37 <raptop> Is Principia compatible with 1.12 yet?

17:38 <queqiao-> ⟨e​gg⟩ what is this

17:39 <queqiao-> ⟨A​l2Me6⟩ New feature in KSP 1.12

17:41 <queqiao-> ⟨D​amien⟩ @egg https://forum.kerbalspaceprogram.com/index.php?/topic/203227-kerbal-space-program-112-on-final-approach-is-now-available/

17:41 <raptop> 1.12 just came out (to have a τ~0, I'm being silly since just means like 45 minutes ago)

18:03 <queqiao-> ⟨S​ir Mortimer⟩ oh my

18:03 <queqiao-> ⟨S​ir Mortimer⟩ the last, at last!

20:41 <_whitenotifier> [Principia] pleroy commented on issue #2400: History persistence lets .sfs files get very large - https://git.io/JnF5A

20:46 <queqiao-> ⟨e​gg⟩ news from the #2400 front: https://github.com/mockingbirdnest/Principia/issues/2400#issuecomment-867937794

20:46 <queqiao-> ⟨r​ocketman⟩ is there any theoretical orbit in which a body with a heavy equatorial bulge could produce a precession rate that lets the line of ascension stay at a fixed latitude?

20:46 <queqiao-> ⟨r​ocketman⟩ is there any theoretical orbit in which a body with a heavy equatorial bulge could produce a precession rate that lets the line of ascension stay at a fixed longitude? (edited)

20:47 <queqiao-> ⟨r​ocketman⟩ is there any theoretical orbit in which a body with a heavy equatorial bulge could produce a precession rate that lets the line of ascension stay at a fixed longitude over the course of the parent body's rotation (edited)

20:47 <queqiao-> ⟨r​ocketman⟩ is there any theoretical orbit in which a body with a heavy equatorial bulge could produce a precession rate that lets the line of ascension stay at a fixed longitude over the course of the parent body's rotation? (edited)

20:47 <queqiao-> ⟨e​gg⟩ that exists even with a small equatorial bulge, and the equatorial bulge just nudges it slightly ; it’s a synchronous orbit

20:47 <queqiao-> ⟨e​gg⟩ (the synchronous semimajor axis slightly depends on oblateness)

20:48 <queqiao-> ⟨e​gg⟩ (the synchronous semimajor axis slightly depends on oblateness and inclination) (edited)

20:50 <queqiao-> ⟨r​ocketman⟩ ok, I'm just thinking of relatively fast oblate rotating bodies like Haumea, and what sort of SSO analogues there might be, and if the procession could be made rapid enough to match the rotation (as opposed to the 365 day procession period of SSO)

20:50 <queqiao-> ⟨r​ocketman⟩ it's fun to theorize about

20:52 <queqiao-> ⟨r​ocketman⟩ referring to large inclinations

20:54 <queqiao-> ⟨r​ocketman⟩ at that point would it even be useful to model the orbits as elliptical unless it's in the surface frame of reference?

20:54 <queqiao-> ⟨r​ocketman⟩ at that point would it even be useful to model the orbits as elliptical unless it's in the surface frame of reference their trajectory would have to change so much over the course of their orbit (edited)

21:04 <queqiao-> ⟨e​gg⟩ ah, you mean Ω′=Ω′_T. I can’t imagine that this would work for any physical body, because the oblateness comes from the rotation rate of the planet, and the precessions that drives in practice (i.e., for orbits that are above the ground) are going to be much smaller than that rotation rate.

21:04 <queqiao-> ⟨e​gg⟩ In any case if that were the case, the perturbation theory that allows you to even talk about the precession rate Ω′ (you need some sort of unperturbed Keplerian thing, and you need the perturbation to be small, in order for that model to work) would probably long have broken down.

21:05 <queqiao-> ⟨r​ocketman⟩ ah I see

21:08 <queqiao-> ⟨r​ocketman⟩ can principia simulate perturbational effects around places like haumea?

22:33 <UmbralRaptop> Yes, though it struggles with duck-like bodies. eg: 67/P Churyumov-Gerasimenko

22:41 <queqiao-> ⟨A​l2Me6⟩ Egg, the progress bar in the flight analysis window seems to have broken.

22:41 <raptop> Is the progress bar throwing pride-themed cats everywhere?

22:43 <queqiao-> ⟨A​l2Me6⟩ Unfortunately not... though it doesn't function much like a progress bar. It's stuck at 0% until the analysis finishes, at which point it flashes to 100% and immediately returns to 0.