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.
<Iskierka>
... I am semi-surprised that the nvidia drivers are still working after a few apt upgrades without keeping an eye on them
<Iskierka>
At least I don't *think* primusrun will fall back to embedded if the dedicated fails
<Iskierka>
already over 9k patches. I think I overmodded this
<Iskierka>
10240 \o/
<egg>
!wpn Iskierka
* Qboid
gives Iskierka a nonpolar e_14159
<egg>
!wpn bofh
* Qboid
gives bofh a long scream
<egg>
??א?ܐا?አΑАⲀ?ᚨA?
<egg>
bofh: hm, would the long scream be ω1 "a"s?
<egg>
that seems scary
<egg>
uncountable ordinals are scary
<bofh>
Yeah, that sounds accurate.
<bofh>
Yeah, basically the long line but with screams instead of reals.
<egg>
bofh: every increasing ω-sequence of screams converges to a limit in the long scream
<bofh>
...I think you just explained US politics twitter.
<bofh>
unrelated but goddamn whatever font my terminal is using merges ω and w completely.
<bofh>
to the point where I was wondering why you were lazily using w for \omega until I copied it to twitter and saw that nope, you weren't.
<bofh>
wait the Iapetus equatorial ridge is ~20km high? damn.
<Qboid>
4d 0h 0m 0s left to event #1: Falcon 9 • SpaceX CRS 12 [at 2017-08-17 16:31:00]. Say '!kountdown 1' for details
<egg>
uuuuh isn't that tomorrow?
<egg>
!kd -edit:1 time 2017-08-14T16:31Z
<Qboid>
egg: Updated event #1: Falcon 9 • SpaceX CRS 12 - A SpaceX Falcon 9 rocket will launch the 14th Dragon spacecraft on the 12th operational cargo delivery mission to the International Space Station. - 2017-08-14 16:31:00
<Qboid>
egg: Description: A SpaceX Falcon 9 rocket will launch the 14th Dragon spacecraft on the 12th operational cargo delivery mission to the International Space Station.
<egg>
(I made it for whitequark a while back hence the name)
<bofh>
Nice.
<egg>
bofh: ?
<bofh>
Does the oblateness have *much* of an effect on seasons anyhow?
<egg>
bofh: no, but tilt and being far from the equator is what gives you seasons
<egg>
you can only have axial tilt if you use principia for weird reasons :-p
<bofh>
Yeah, that's what I thought. Like, axial tilt should be sufficient.
<egg>
bofh: yeah that was badly worded; it gives tilt; it makes things oblate; since we have tilt why not have seasons at the launch site, so move it to 40 deg lat
<bofh>
ahh, yes. okay that makes more sense now.
<egg>
bofh: also because Kopernicus is needed to do the retrobop patch if you modify the stock system at all, and that set of configs already requires a mod that can move the space centre
<bofh>
Fair enough. I was mostly wondering why bother with oblateness values that small, it's basically still a sphere.
<egg>
bofh: so those J2 values make Jool Jupiter-like, and Kerbin Earthlike
<egg>
bofh: and the J2 of those gravitational fields are definitely noticeable (something something молня орбит forgot to switch back the keyboard)
<bofh>
Okay, Jupiter's J2 is very very noticeable, but Earth's is tiny.
<bofh>
like granted you don't want it in a Molniya Orbit sat anyway b/c having to continuouly periodically waste hydrazine is annoying, but it accounts for a very slow drift.
<bofh>
tho admittedly I *do* need to consider it in my code for ground tracks of LEO sats
<bofh>
it's necessary to get accurate RA, but not necessary to get sufficiently accurate doppler (tho a lot of that's b/c PLLs let you cheat with the latter a bunch)
<egg>
bofh: so, like, that's enough that you can have heliosynch orbits
<egg>
bofh: or so that the молня (or QZSS) inclination is magic
<kmath>
<eggleroy> a while ago @whitequark mentioned "the goddamn numerical blowup in nbody" apropos KSP; the plight of Bop shows that: https://t.co/JGlyKsd6AK
<bofh>
egg: OH RIGHT, I keep forgetting the tropical year and the sidereal year differ
<bofh>
oh no I *was* linked this by whitequark actually, it's what got me into Principia :P
<Majiir>
sup nerds
<egg>
bofh: you can have a sat that constantly hovers above the terminator, and that's all thanks to J2! \o/
<egg>
you can try to have a sat that hovers above the Terminator, but that's trickier
<egg>
!wpn Majiir
* Qboid
gives Majiir a Bolzano-Weierstraß panzer
<Majiir>
A panzer! Finally! A weapon that can do some damage!
<bofh>
heh.
<Majiir>
A bit weird that this one was named after some German mathematicians, but I assume that means it's just a very well-designed panzer
<bofh>
I guess a few arcseconds a day perturbation adds up over the course of a year.
<egg>
Majiir: yes, you can show that panzer to any bounded sequence, and it is going to get itself a limit
<bofh>
^
<egg>
bofh: if you have any suggestions on further retrobop research I can try poking at that at a later date :-p
<egg>
I mean there's that TODO section :-p
<bofh>
True, let me reread. Also let me finish working through these calculations. Also let me finish reading this paper. Goddamn I am extra-bad at organization today.
<egg>
bofh: tbh this channel is good at producing stacks of nerd-snipes :-p