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
<egg|zzz|egg> [MINUS SIGN]13[DEGREE SIGN]24[PRIME][FIGURE SPACE]8[DOUBLE PRIME]2
<egg|zzz|egg> [EN SPACE][SIX-PER-EM SPACE][FIGURE SPACE][FIGURE SPACE][THREE-PER-EM SPACE]24 29,[HAIR SPACE]7
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<egg|zzz|egg> tawny: well, what does it mean for the moon to be in the same place wrt the fixed stars, when the precessions mean it doesn't return to the same place :-p
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<egg|zzz|egg> UmbralRaptop: meow
* raptop pets egg|zzz|egg with an arbitrary month
<B787_300> Hey egg|zzz|egg so the moon is currently tidally locked to the earth and is moving away from earth right? Will the tidal forces eventually cause it to start rotating wrt earth as it moves farther away?
<egg|zzz|egg> it should slow down its rotation as its orbit slows
<B787_300> Or is tidally locked a stable thing and the only way to get it spinning with a massive impact
<bofh> egg|zzz|egg: nice
* raptop would assume stability
<egg|zzz|egg> B787_300: yes, it's stable (induced by tides, as the name indicates)
<egg|zzz|egg> so as the moon drifts away, its rotation slows
<B787_300> egg|zzz|egg: but wouldn't the long term stability rely on the moons mass distro?
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<egg|zzz|egg> I don't get it
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<B787_300> So the way I was thinking about it was if the moon has a lumpy mass distribution and the body it is orbiting is lumpy mass distortion as it moves farther out the lumps can be in different gravity strengths causing a torque
<B787_300> But I am waiting for a play to start so will be able to discuss again in like 3-4 hours
<egg|zzz|egg> meow
* egg|zzz|egg meows at bofh
* egg|zzz|egg considers sleep
<bofh> meow
<egg|cell|egg> Meow
<egg|cell|egg> Zzz
<egg|cell|egg> Rrrrrootn
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* UmbralRaptor 🔪 🚌
<UmbralRaptor> (Last one on Saturdays is 30 minutes before the last one on weekdays)
<B787_300> UmbralRaptor: logic
<UmbralRaptor> The logic being that everyone works ~9-5, and only uses transit to get to/from work.
<B787_300> Do they not know astronomy types work at weird times?
<bofh> https://www.youtube.com/watch?v=9WUoT6GVtXI&fmt=18 WHAT THE HELL THE VIDEO FEATURES HTOP, GPREDICT AND THE L-BAND HYDROGEN LINE FREQUENCY. I WAS NOT EXPECTING *ANY* OF THAT.
<kmath> YouTube - Jean-Michel Jarre - Oxygene, Pt. 17 (Official Music Video)
<UmbralRaptor> I guess. Also, I eggspect to be walking (or driving) home every night I'm helping with observatory tours.
<UmbralRaptor> bofh: also the wow signal?
<UmbralRaptor> oh, radio L, not IR
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* UmbralRaptor 🔪 the super blood wolf moon in the rain.
<bofh> rofl the superbloodwolfmoon
<bofh> that is Not A Thing but even reputable sites have been running things with that title and it's absolutely maddening.
<UmbralRaptor> It does sound like something you'd see run at [A,S]GDQ…
<bofh> Most likely in the AwfulGDQ block, honestly.
<UmbralRaptor> Quite possibly.
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<egg|cell|egg> Meow
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* UmbralRaptor 🔪 sleep again
* egg|zzz|egg meows at UmbralRaptor
* UmbralRaptor scritches egg|zzz|egg
* egg|zzz|egg purrs
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<egg|zzz|egg> Aha!
<egg|zzz|egg> Sidereal period of revolution (of a satellite)
<egg|zzz|egg> The time elapsing between two consecutive intersections of the projection of a satellite onto a reference plane which passes through the centre of mass of the primary body with a line in that plane extending from the centre of mass to infinity, both the normal to the reference plane and the direction of the line, being fixed in relation to the stars.
<egg|zzz|egg> from RECOMMENDATION ITU-R S.673-1
<egg|zzz|egg> cc bofh, UmbralRaptor, et al.
<egg|zzz|egg> (which is a .doc...)
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<_whitenotifier-1656> [Principia] pleroy synchronize pull request #2065: Proof of one direction of the damping condition - https://git.io/fh409
<_whitenotifier-1656> [Principia] pleroy edited pull request #2065: Proof of the damping condition - https://git.io/fh409
<egg|zzz|egg> bofh: oh nice, now you can handwrite an alphanumeric code on the envelope in CH instead of affixing a stamp
<egg|zzz|egg> (it used to be that you could print your own stamp, but now they managed to cut out the printing step too)
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* egg|zzz|egg meows at UmbralRaptor
* UmbralRaptor converts the doc into both a docx and a pdf
<egg|zzz|egg> ;8ball does bofh eggsist
<kmath> egg|zzz|egg: Outlook not so good
<egg|zzz|egg> hm.
<UmbralRaptor> ;c <bofh|x|bofh>
<kmath> UmbralRaptor: Unknown Token
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<mlbaker> bofh: ^
<bofh> https://twitter.com/bofh453/status/1087064813065261057 today's galaxy brain hot take
<kmath> <bofh453> Really curious how hard it is to get just instant ramen flavour packets in bulk, w/o associated noodles. ⏎ ⏎ Since tho… https://t.co/tv1J6vRd7P
<bofh> 15:54:23 <@egg|zzz|egg> bofh: oh nice, now you can handwrite an alphanumeric code on the envelope in CH instead of affixing a stamp
<bofh> ooh, that's interesting.
<bofh> mlbaker: alreday following them lmao
<bofh> they're excellent
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<egg|zzz|egg> bofh: is zat Serre
<egg|zzz|egg> ize zatte Serre
<bofh> Serre?
<mlbaker> bofh: dude, those flavour packets are death
<bofh> mlbaker: I've eaten like Five today
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<egg|zzz|egg> bofh: profile photo of infty dril
<egg|zzz|egg> it's Jean-Pierre Serre
<bofh> ahh.
<bofh> Yeah, that looks like it.
<mlbaker> it says serre's name
<kmath> <mnxmnkmnd> Wow a proper french meal involves... quite a lot of wine...
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* egg|zzz|egg meows at Technicalfool
<Technicalfool> eek
* UmbralRaptor chirps at Technicalfool
<Technicalfool> been a while. I need to leave an IRC client running more often :P
<UmbralRaptor> It's oddly convenient if you have an android phone. Though admittedly a bouncer is better.
<Technicalfool> been spending too much time at work. Or making toys on Second Life of all places.
<Technicalfool> (turns out people will pay real money for a thing that makes you squeak when someone clicks your nose)
<egg|cell|egg> Meow
<Technicalfool> Maybe I should make a free update that includes cat-clickies.
<Technicalfool> Maybe egg should port Principia to LSL to work with SL vehicle physics. Watch everyone start walking in slow motion as it tries to cope with every massive body in the region.
<egg|cell|egg> SL?
<egg|cell|egg> Lsl?
<Technicalfool> Second Life :P
<Technicalfool> "Linden Scripting Language", basically event-driven stateful C-like.
<Technicalfool> and strongly typed, so you'll both love and hate it for many reasons.
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<kmath> <SFRuminations> He loves SF covers.... as pillows. https://t.co/BNW4UFTqWm
<egg|zzz|egg> bofh: meow
<_whitenotifier-1656> [Principia] pleroy synchronize pull request #2065: Proof of the damping condition - https://git.io/fh409
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<kmath> <DJSnM> My cat just read my mind & changed the music on my HomePod, it was a station inspired by Otis Redding and it was pl… https://t.co/pQewLqoqAC
<egg|zzz|egg> bofh: mrow
<bofh> meeeeow
<egg|zzz|egg> bofh: meeeeeeeeeooow
<egg|zzz|egg> bofh: i haz statistics questions
<egg|zzz|egg> cc UmbralRaptor
<egg|zzz|egg> bofh: I'm writing that orbit analyser; I'm computing the periods as means of individual node-to-node or periapsis-to-periapsis times, so I guess there the error should be the standard error of the mean?
<egg|zzz|egg> bofh: what should I use for the precession rates, that I compute as the slope of the least-squares fit
* UmbralRaptor chirps at egg
<UmbralRaptor> I'm not sure what the right tool would be since this isn't really a stochastic process, especially at short timescales.
<egg|zzz|egg> UmbralRaptor: bofh: mostly this is to figure out how many sigdec I want to show, but yes
<egg|zzz|egg> bofh: meeeeeooooow
<UmbralRaptor> I mean, standard error scales with number of measurements, right?
* UmbralRaptor feels like number of digits should be based on some combination of rate of change and timescale
<UmbralRaptor> yeah, that n.
<egg|zzz|egg> UmbralRaptor: that should make sense, right? as I sample more orbits I should get a better idea of the average orbital period
<egg|zzz|egg> the problem is normality which is probably false
<egg|zzz|egg> but is it true enough for the purpose of choosing how many sigdec to display
<egg|zzz|egg> porpoise
<B787_300> UmbralRaptor: so i was rewatching The West wing, and an episode that came out in '04 was making fun of JWST
<UmbralRaptor> egg|zzz|egg: yeah, the distribution in time could get silly
<UmbralRaptor> B787_300: oof
* egg|zzz|egg pokes bofh with a flyswatter
<B787_300> yeahhhh
<B787_300> thats when you know it is bad, when an old tv show was making fun of something 14 years ago and it still isnt in orbit/working
* bofh scrolls up, sees stats questions
<bofh> (so like I needed to catch a train)