raptop 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> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
<UmbralRaptor>
"What came to my mind about SIRTF was this high-Earth orbit. The project was happy with the way it was, but I knew that a simple calculation says that high-Earth orbit was not a very good orbit to be in from an energy perspective. But if I let SIRTF escape, I can actually use a smaller rocket; I mean, that calculation is very simple. But the thing I didn’t have time to figure out was, Which way do I send it [into solar o
<B787_300>
egg|zzz|egg: i love that video
<UmbralRaptor>
No, the book doesn't seem to give the HEO's parameters
<B787_300>
What was SIRTF?
<B787_300>
SIRTF?
<galois>
SIRTF: Space InfraRed Telescope Facility (became Spitzer)
<B787_300>
ah
<UmbralRaptor>
I think before the 1980 decadal report the S was for Shuttle
<egg|zzz|egg>
Spattle
<egg|zzz|egg>
Spatula
<UmbralRaptor>
Spatula Improved Rice Tasty Food
<B787_300>
UmbralRaptor: before 86?
<UmbralRaptor>
Uh, possibly
<UmbralRaptor>
but I think the switch to free-flying was before that
<UmbralRaptor>
Not sure at what point they gave up on shuttle launched
<B787_300>
86 would be a decent bet... because you know a big issue happened that year with Shuttle
<B787_300>
egg|zzz|egg: random question have you ever seen the missile guidance video with the line "the missile knows where it is at all times. It knows this because it knows where it isnt"?
<UmbralRaptor>
I'm loath to falling over and vividly hallucinating, but it is unfortunately necessary
<B787_300>
Just dont dream... or dont remember your dreams...
<B787_300>
I havent had a dream I remember in quite a while
<egg|zzz|egg>
UmbralRaptor: > You can probably make x-ray, particle, and magnetic detectors interesting (though this risks going over to being probes) << any specifics?
<UmbralRaptor>
Chandra's orbit is in part to have it be above the van Allen belts, right?
<egg|zzz|egg>
aaah right there's that too
<egg|zzz|egg>
hm
<egg|zzz|egg>
UmbralRaptor: yeah and then i suppose one should model the fact that observation should stop when entering them
<egg|zzz|egg>
are they a thing in RSS?
<egg|zzz|egg>
or Kerbalism? what does kerbalism even do
<UmbralRaptor>
unsure
* UmbralRaptor
jokingly suggests creating a mod named Maxwell
<galois>
title: iximeow on Twitter: "nothing like a friday afternoon realizing you modeled all of that completely wrong to get you in the mood for the weekend"
<SnoopJeDi>
UmbralRaptop, but the MU69 paper!
<UmbralRaptop>
(I should have known that those low mass planet recoveries were too good to be true)
<SnoopJeDi>
tl;dr "yay evidence for pebble accretion, dunno about the rest yet"
<UmbralRaptop>
thanks
<SnoopJeDi>
(it was today's happy hour link)
<SnoopJeDi>
You're welcome! I'm delighted to share it with someone who actually astronomys for a living
<SnoopJeDi>
Would love to do a Twitter thread about it, but if I do anything in the next few days it's for sure going to be about world metrology day and the death of Le Grande K
<SnoopJeDi>
UmbralRaptop, I would love to hear your digest of that paper, btw, since you actually grok starstuff :)
<_whitenotifier-5dfc>
[Principia] pleroy opened pull request #2171: Change the API of Manœuvre to unify it with Burn - https://git.io/fj88M
<_whitenotifier-5dfc>
[Principia] pleroy synchronize pull request #2171: Change the API of Manœuvre to unify it with Burn - https://git.io/fj88M
<egg|zzz|egg>
mofh: "We shall treat the variable f as the “time” in the ER3BP, but, to avoid ambiguity, shall use primes to denote differentiation with respect to f and dots to denote differentiation with respect to t"
<egg|zzz|egg>
whitequark: i am eggstremely weirded out that J turns into Дж in ru (Joule is [ʒul] in fr, which sounds more like "жул", i wonder where the Д comes from)
<galois>
title: Системы лазерных уголковых отражателей для лазерной локации космических аппаратов
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<egg>
mofh: ?
<egg>
UmbralRaptop: nah the notation isn't from soviet astronomy
<mofh>
egg: using two different symbols to denote differentiation wrt a particular variable instead of just using Leibnitz partial derivative notation as god intended
<egg>
UmbralRaptop: it's from "Lagrangian coherent structures in the planar elliptic restricted three-body problem
<galois>
title: whitequark on Twitter: "the only downside is it seems like moths are irritating to a cat's stomach. silver lining: i'm now very good at cleaning cat vomit"