/sci/ - Science & Math

>>9632964
If I'm correct in reading the last orbit plot that I saw, the U.S. is no longer within the crash path.

>>9633037

Where you getting your info?


http://blogs.esa.int/rocketscience/2018/03/26/tiangong-1-reentry-updates/ is the ESA tracking team

>>9632964
https://www.virtualtelescope.eu/webtv/
Telescope tracking tiangong

>>9633049
Your link is broken (?)

I'm trying to find the plot- it covered the orbit from last night to tomorrow night. There was only 4-5 orbits that travelled over north/south america.

Didn't find the old one, but here's a current one. And yep, the Americas are in the clear.

>>9633068
Sorry, wasnt paying attention when I was typing.
North america is safe, south america is still in the flight path.

>>9633068
Blue is where its been
Yellow is where its going.
Plot is a few hours old

>>9633068
>http://blogs.esa.int/rocketscience/2018/03/26/tiangong-1-reentry-updates/

Working for me. Anyway, here's the N2YO track. Heaven's above is tracking it too (probs through N2YO). http://www.n2yo.com/?s=37820

>>9633068
>>9633089
can't rule out areas yet, but 5 hours before reentry we should be able to rule out a good portion of the earth, so far we know it will fall within 43S and 43N

in the grand scheme of things it barely makes the top 50 reentry list

Hey science fags

>>Why is no one talking about the possibility of a kessler syndrome? Is it because its too low now?

>>9634188
as long as you can get out of LEO it's fine.

>>9633682
>columbia
Anon...

>>9633682
Also where is Mir on this list?

>>9634250
spreadsheets don't discriminate lad

>>9634255
the list is for uncontrolled reentries. This one is for controlled

70% chance of hitting ocean

>>9633068

That's a flat earth.

>>9634526
lower Canada

>>9634566
for you

>>9632964

YOUR MOTHER IS SO FAT, THAT SHE HAS HER OWN ORBIT AND SHE PULL IN SPACE JUNK TO HIT HER

Isn't this the plot of Mobile Suit Gundam Wing?

>>9635169
She's not fat.

>>9635174
It's the plot of literally every Gundam show ever.

Eventually

>>9633682
challenger?!?

>>9634188
Kessler syndrome would result in humanity developing advanced space combat vechicles in order to clear the debris.

hopefully it kills a trump supporter and their familiy - china is doing the job that the government should be doing.

Soon

>>9635708
Challenger didn't make orbit, that's a list of reentries.

>>9635768
Oh look, another violent commie thinks the government should change his diapers. I mean, it's not your fault you have to poop, you never chose that. And what about people born without arms, obviously the government should change their diapeys. Should you really have to cut off your own arms for some basic fucking human rights? #Resist

Anybody who lives in the upper eastern midwest/north-east of America. It's about to pass over you in 20-30 mins. Might want to go and have a look. It's your last chance to see it.

http://www.n2yo.com/?s=37820&live=1

>>9636016
New England specifically

>>9635644
Probably hit early April 2nd so at least 24 hr

Trending

So based on the current predictions, it looks like the fireball won't be visible from any populated places in the Northern hemisphere. Shame.

>>9632964
Bump for following

>>9637271
is from http://www.aerospace.org/CORDSuploads/TiangongStoryboard.png

Scheduled to crash in about an hour (+/- 2 hours)
So it could still hit land, there's just too much variables.
My vote is for Niger.

Currently dropping below 140km right after reaching apoapsis, not long now. Probably going to fall somewhere in Africa.

Fuck predictions, I say it lands back into china.

>eating popcorn

Now why didnt Taco Bell do a huge net in the middle of Benin or somewhere to catch this school bus like the did with that satellite a few years back?

>138km
It's literally going to crash back into China, isn't it

>>9637830
is it too early to feel a diamond-hard boner coming on?

New zealander here, what are my odds of catching a piece of heaven

>>9637842
Non-existant now, you're no longer on the trajectory and the thing is going to fall any second now, its orbit is decaying like crazy

Any chance the spacecraft will hit Brazil? What about any other South American countries?

>>9637848

Dammit, back to work tomorrow I guess

>>9637859

It just has. Got a weather balloon attached to it: https://youtu.be/DvP5VK96KTk

>>9637866
what? i dont understand, can u explain?
>tfw team mini brainlet

>>9637876

Basically gravity is bullshit.

So I'm tracking it live and the altitude is increasing... measuring error, or is it expected to "skip" a few times?

>>9637887
The orbit is just slightly eccentric (i.e., elliptical instead of perfectly circular) which is perfectly normal.

>live in the north
>tfw heavenly palace wont crash in your head and take away the suffering

>>9637887
it's been at it's perigee and orbiting towards the apogee

>>9637895

I prefer to believe that it's rebounded off the earth and will make its way to its place in the aether

Sic itur ad astra, heavenly palace

>>9637900
owoo

it would have been a very \sci\ way to go.

Bress F to pay respects

>>9637900
>it's been at it's perigee and orbiting towards the apogee
And to elaborate on that, you can see in the altitude plot how the altitude of the perigee and the apogee are both steadily decreasing.

>>9637906
You sure got a purdy mouth

That's the apogee done, we're heading down again...

are there any livestreams anywhere?

>>9637923

I'm using satflare.com

The earth is flat and that piece of junk is just slowly spiraling down to us.

Entering the final orbit, huh?

>>9637952
Possibly

I'm on http://www.satview.org/?sat_id=37820U

>>9637900
Any amerifags that can explain the difference between a FFRDC like Aerospace and the USG? Why isn't it part of the NRO or NASA?

thread theme

https://www.youtube.com/watch?v=9jK-NcRmVcw

Any indication of this thing's speed? Surely it must be starting to bleed off

>>9637992
Shouldn't it actually speed up as its altitude drops?

>>9637998
Speed is what keeps it up in orbit.
Drag is what causes it to fall.

>>9637999
Higher orbits are slower though. Lower orbital velocity. That's why GEO (where the period is 24 hours) is so much higher altitude than LEO (where the period is like 90 minutes).

HIT ME AND END MY SUFFERING

>>9638008
That's the point. The higher the orbit is, the more energy you spent getting up there, the less energy you need to spend to stay up there. Which means you orbit slower.

>>9638012
Yeah, that sounds about right. So as Tiangong is falling, isn't it orbiting faster? Once the drag becomes significant all bets are off I guess, and the altitude is already so low that drag must be a big factor, so maybe the relationship doesn't hold true in this case.

How can no one know where this is going to land? Surely it's just a matter of orbital mechanics to plot a trajectory?

LAST ORBIT

>>9638028
Drag is impossible to model accurately enough. We don't even know the surface characteristics of the station, because the Chinese are secretive.

>>9638028
>How can no one know where this is going to land? Surely it's just a matter of orbital mechanics to plot a trajectory?

Tiangong-1 isn't falling down because of orbital mechanics, but because of exo-atmospheric drag. There's still trace gases up to very, very high altitudes around our planet, and they affect the trajectory of orbiting spacecraft by reducing every object's orbital velocity.

>>9638034

>crunching noises, leans forward in chair

>satview says 75 minutes to reentry
HAPPENING

https://youtu.be/bKvVgZsxFAg

https://youtu.be/bKvVg2sxFAg

>>9638043
IDS HABBEBING

>>9638039
>exo-atmospheric drag
mfw Space Trannies

>>9638043
GUIZ BUT WHERE

are there any /scianons/ in imminent danger of an heroing from chunks of molten Heaven?

>>9632964
I'm waiting for Sandra Bullock to land in my front yard.

>>9638061
>tfw the upper atmosphere is

>>9638061
>tfw you realize all that dark matter is thrown shade.

>>9638017
Should be.

>>9638043
>period 87.5 minutes
>reentry in 75 minutes
Last orbit. Looks east Pacific.

>>9638080
hnngggghhhh

>>9638064
>tfw Chinese Sandra Bullock is about to hit the East Pacific at 2 trillion clicks per

Bonus points if it drops squarely into Point Nemo

So is no one required to have de orbital plans for any of this crap they send up there? They just chuck it up and hope it doesn't come down on your head?

>>9638103
>So is no one required to have de orbital plans for any of this crap they send up there? They just chuck it up and hope it doesn't come down on your head?

US launches, and launches for US companies, require disposal plans.

>>9638103

Whatever plans the Chinese had for this thing went out the window when they lost the ability to communicate with it. Not even billion dollar space programs can escape Chinese corner-cutting

>>9638103
china doesn't even give a fuck where their first stages land

>>9638103
They usually do, but they require the spacecraft to be in working order to drop it in a specific place.

>>9638092
I read up on it, I guess that really would be funny, since it's where satellites are normally dropped.

>>9638092
>Point Nemo

>>9637900
Would be funny if it dropped near Easter Island

>>9638164

Easter?

HOLD ONTO UR BUTTS PATAGONIA

>>9638189
laughed irl

Satview crashing this station with no survivahs now.

Uh oh it's going to hit the fucking SUN

>time to reenter increased again
Fuck.

they could use a few of these
https://www.youtube.com/watch?v=wf3KCkRepVk

>>9638213
Ignore, seems my thing bugged out.

Why doesn't the altitude change?

I like how the altitude track has it come up back out of the ground nearly an hour later. I guess it can swim.

>>9638228
Fucking Chinese discovered anti-gravity and faked a crash-landing to show-off.

>>9638228
It's in a dead cat bounce right now.

I refreshed satview and now I'm getting an internal server error RIP

Reentry soon, predicted to be off the coast of Chile.

>>9638229
That altitude plot has 110km as the lowest point.

>>9638238
hopefully it's somewhere where lots of people can get video of it

>>9638228
satview only updates the orbital parameters when it's in reach of the radio station

>>9638246
oops

crashing this space station

>>9638229
I like how that shows an altitude 20 km below perigee.

>>9638256
with no survivors

Keep in mind that none of these websites are reporting live telemetry. Almost all of these numbers are based on predictions from data that is HOURS old. If there are no live sightings reported we won’t know if the station has fallen to Earth until the US Navy reports it.

I wonder if ISS will be in a position to see it. In half an hour, maybe.

beginning of the final plunge

Debris will hit South America. Better watch out.

Dawn of
The Final Orbit

- 24 minutes remain -

6 minutes

Brace your asses.

>>9638291
At least it should be on the night side, someone will probably see it re-enter.

boom

Reentry will probably be visible from Chile, so hopefully they have good cameras down there. Apparently it will crash anywhere between South America and Africa.

Satview now reporting "burning" with the conclusion of its countdown, while other sources still have the thing climbing.

GOOD LUCK TIANGONG SAMA

>>9638313
without actual radio or visual contact nobody knows what's going on with it

>>9638316

WE IN PANIC MODE NOW, BOYS.

https://www.youtube.com/watch?v=5yF3qRPoqw8

I live in the central chilean coast. sadly, it's very cloudy here, so I can't see shit.

>>9638328
PANIC!

>>9638328
Wait. Why does the ISS camera look all orange and fiery now?

>>9638328
It's moving again.

>>9638341
Guess it needed a break to cool down.

>>9638336
OH SHIT THE ISS IS FALLING OUT OF THE SKY TOO

Good lord. Hurry up and die you stupid piece of Chink shit.

I thought this think would immediately slow down to zero when touching the atmosphere but it will go another hour until it crashes?

>>9634250
I didn't come for the feels

huehues dodged a bullet

>>9638356
reminder that this isn't KSP and these are not live measurements but projections based on historical data

>>9638356
It has been touching the atmosphere since it launched, anon. That is why it is falling.

>>9638368
l-lewd

Is probably dead by this time anyway

>>9638369
kek

>>9638373
Yes.
It is entirely possible it has broken up over the Pacific, they're still tracking the path it was taking but we are waiting for tracking stations to either reacquire it or confirm it has been lost.

goodnight sweet prince

F

How come there's no telemetry from this thing?

>>9638386
It's dead, Jim. Since 2016.

>>9638386
Chink tech

>>9638386
>>9638391
Chinese "lost control", aka they didn't want to clean up after launching the second one so they just turned it off and let the chips fall where they may.

So apparently it didn't fall...yet.

hope it falls in israel

>>9638428
I hope it falls into Beijing so that they learn to take care of their trash

RIP

from the chatbox:
>Tiangong-1 space module re-entered the earth's atmosphere at 8:15 a.m. (0015GMT) on Monday over the South Pacific and mostly burnt up on re-entry, China's state news agency Xinhua said.

>USSTRATCOM OFFICIAL MESSAGE The TIANGONG 1 satellite reentered the atmosphere Apr/02/2018 at 00:16 UTC with an approximate error of +/- 1 minute(s)

>>9638424
seems to be down:
https://twitter.com/planet4589

https://www.theguardian.com/world/2018/apr/02/tiangong-1-crash-china-space-station?CMP=twt_a-world_b-gdnworld

China’s Tiangong-1 space station has crashed in the Pacific Ocean, according to the country’s space agency.

The spacecraft re-entered the earth’s atmosphere at 0015 GMT on Monday over the South Pacific and mostly burnt up on re-entry, state news agency Xinhua said. Independent confirmation from other international agencies and expert is still being awaited.

The 10.4-metre-long (34.1-foot) Tiangong-1, or Heavenly Palace 1, was launched in 2011 to carry out docking and orbit experiments as part of China’s ambitious space programme, which aims to place a permanent station in orbit by 2023.
Tiangong-1 crash: everything you need to know
Read more

It was originally planned to be decommissioned in 2013 but its mission was repeatedly extended. Eventually, in 2016, it had become apparent to space-watchers that the craft had stopped functioning and was no longer responding to ground control.

In December 2017, China eventually made a statement to the UN predicting that Tiangong-1 would come down by late March.

The Chinese tabloid Global Times said on Monday that worldwide media hype about the re-entry reflected overseas “envy” of China’s space industry.

“It’s normal for spacecraft to re-enter the atmosphere, yet Tiangong-1 received so much attention partly because some western countries are trying to hype and sling mud at China’s fast-growing aerospace industry,” it said.

More to come

>>9638476
ripped in peace

>>9638481
>The Chinese tabloid Global Times said on Monday that worldwide media hype about the re-entry reflected overseas “envy” of China’s space industry.

Funny.

https://twitter.com/18SPCS/status/980614448745406465

http://www.xinhuanet.com/english/2018-04/02/c_137082156.htm
>BEIJING, April 2 (Xinhua) -- Tiangong-1, China' s experimental space lab, reentered the Earth's atmosphere at around 8:15 a.m. on Monday, China Manned Space Engineering Office (CMSEO) said.

>It re-entered in the central region of the South Pacific, the CMSEO said.

>The space lab was mostly burnt up in the atmosphere, according to the monitoring and analysis of the Beijing Aerospace Control Center and relevant organizations.

>Tiangong-1 was launched on Sept. 29, 2011 and ended service in March 2016 after completing its mission. It has docked with Shenzhou-8, Shenzhou-9 and Shenzhou-10 spacecraft, and undertaken a series of tasks, making important contributions to China's manned space cause.

They can't even make a space station falling interesting. It lands where it should have landed if they had control of it.

>>9638503
What if they just pretended to have no control.

>>9638350
typical creme poster

>>9638504

>>9638504
>haha it was a prank bro
>april 1st, get it?? haha!

>>9638493
>Chinese can't be fucked disposing of their waste properly
>Oh well fuck it just have it crash down wherever
>Why are these fucking gweilo mad at us
>They must be jealous of our factories shitting industrial pollutants into nearby villages

>>9638522
To be fair, it is propaganda and isn't meant to be taken at face value.

https://en.wikipedia.org/wiki/Chinese_large_modular_space_station
>These poetic[11] names continue as the first, second, third, fourth and fifth Chinese Lunar probes are called Chang'e after the Moon goddess. The name "Tiangong" means "heavenly palace". Across the PRC the launch of Tiangong 1 inspired a variety of feelings, including love poetry. Within the PRC, the rendezvous of space vehicles is compared to the reunion of the cowherd and the weavergirl, Niulang (Chinese: 牛郎) and Zhinü (Chinese: 織女), lovers separated by the Milky Way which was scratched there by an angry goddess. Only on the night of sevens, over a bridge made from all of the sympathetic magpies in the world, the lovers may meet. The remainder of the year, Zhinü sits on the banks of the 'Milky Way' river with two of her children and weaves the clouds, with Niulang on the other side.

>>9638548
amazing how poetic they like to portray themselves, for a country which seems to have no particular issue using massive surveillance to round up dissidents and put a bullet in the back of their head.

According to various sources, the landing zone is known as the spacecraft graveyard. It's where multiple satellites, probes, spent upper stages, and whatnot have crashed.
http://www.aerospace.org/cords/reentry-predictions/tiangong-1-reentry/

>>9632964
Don’t we have missiles or lasers that can evaporate this thing? Why would the nations of the world just let it crash and destroy property and life? Is it it that unpredictable?

>>9638602
The total amount of debris that reaches the surface typically pose little threat to life and property.
Further, while we do have the capability to destroy satellites in flight, the resulting debris field causes more problems than it solves things.
Recall that during the Columbia disaster of 2003, there were almost no injuries or reports of damage. The largest pieces of debris that were recovered where the main engines, and those landed in a golf course, and not on someones home.

>>9638522
Yup
yup
yup
and yup

>>9638615
>during the Columbia disaster of 2003, there were almost no injuries

>>9638561
>t.facebook user
try telling everyone that you are a communist, and see what happens

>>9638602
there is a video ITT related to that

China does things sanely
Test, get some experimence on a small manageable size of space station, then crash the thing because its useless

>>9638693
>Hey everyone go make steel in your back yard

Probably the only pics taken before it went down

>>9638711
>Maybe the last images of #Tiangong1? Today morning (CEST) we tracked it at an altitude of 161 km and made new world exclusive #radarimages. It is still intact, no damage. Next measurement in ~21h, most probably it is down then. #Tiangong #radar #reentry #tira #space #image

https://twitter.com/Fraunhofer_FHRe/status/980395795743690752

>>9638672
I should have been more specific.
Aside from the tragic loss of life of the astronauts, there were no ground based injuries or fatalities as a result of falling debris.

Again, I apologize for that. It was careless.

>>9638602
>Don’t we have missiles or lasers that can evaporate this thing?
No.

>>9638693
>Test, get some experimence on a small manageable size of space station, then crash the thing because its useless
That's what everyone did, though. The USA just started with a larger station because they had a super-heavy launch vehicle available at the time.

>>9632964
Why is everyone taking the burn up news as de facto true? The chinese space agency said said "devices" were destroyed and the US govt only confirmed reentry. This is b.s. - when it really lands, theres an egg hunt to grab it - 15 cu meters is black box to the rest of the world, btw. They wont reveal design.

>>9638961
>Why is everyone taking the burn up news as de facto true?
Multiple counties have been tracking Tiangong-1's attitude and descent. It was clearly out of control and falling.

>The chinese space agency said said "devices" were destroyed
What?

>This is b.s. - when it really lands, theres an egg hunt to grab it
Why? There's nothing valuable there.

>15 cu meters is black box to the rest of the world, btw
Again, what?

>They wont reveal design.
There's no reason to think there's anything interesting about the design.

Anybody manage to film it? Maybe some Peruvian fisherman out at sea?

>>9639192
https://m.youtube.com/watch?v=JpgzHUBVpKk

>>9638961
>They wont reveal design.

No government agency actually cares about the space station itself, it's basically just a Salyut ripoff.

I was sorta hoping it would crash on mecca for lulz. That would have been the great shitstorm of our time. Oh well.

>>9638983
>>The chinese space agency said said "devices" were destroyed
>What?
Probably translation error crap.

>>This is b.s. - when it really lands, theres an egg hunt to grab it
>Why? There's nothing valuable there.
Anything that falls from space is valuable just for collectible value. Collecting meteors is a big business. You can say that you have something FROM SPACE and it survived re-entry!

>>9639551
>Anything that falls from space is valuable just for collectible value.
Sure, but they seemed to be implying it had some kind of military or technological value, rather than just being a novelty.

>>9632964
Satellites do not exist anon.

>>9638729
Those "astronauts" are all still alive.

>>9639563
>>9639566
You're not a clever as you think you are.
Go away.

>>9639566
We're talking about Columbia, not Challenger.

>>9639551
>Anything that falls from space is valuable just for collectible value.
I'm not sure I would want to collect parts of this station, even if it came down on land.
Those hypergolic fluids are pretty nasty.

>>9639563
https://www.youtube.com/watch?v=pDIPZFqfGGo

You can't see satellites because their too small and moving a breakneck speeds. Stop thinking your better than everyone else because you think you hold "secret" knowledge of Pizza Earth.

>>9639563
https://rationalwiki.org/wiki/Dunning-Kruger_effect

>>9639579
That's because you're not a space nutter.

>>9638504
What if they never said it was out control.

>>9638394
>>9638522
>>9638616
>Indians cant even properly launch shit into space in accordance with international guidelines
>hello fellow dalit! dont be mad as us, lets talk about that Chinese sattelite that has been properly disposed with the regular procuderes
>yes fellow dalit! i confirm multiple countries hobby bloggers and reporters confirmed its completely out of control and tumbling and crashing
>yes CNN and countless other reliable newspapers said China admitted they lost control so there you have it straight out of the mouth of the culprit, no Chinas chief staff denying that doesnt mean anything
>wow its literally nothing, but what if anything went compltely wrong? well it could have been out of control? lets just skip the could! its happening
>wow! i cant even! a test device dropping out of space after just X years. X years? why isnt it on Mars yet? lol Chyna!
>hello fellow dalit! remember that Chinese space station disaster that crashed on Mandelas home like me?
>did someone mention Chyna fellow centipedes?

>>9639650
I have no idea what you're even trying to say.
Maybe take a break from 4chan for bit.

Vale

>>9632964
What happened?

>>9639650
>the station could have crashed into a populated area
>anyone who points this out is an envious westerner or an indian
How do Chinese brains work?

>>9639580
It's not a secret...it's pretty obvious that's it's flat and you can believe in satellites if you want but that doesn't change the fact that they do not exist.

>>9639949

China's first space station "Tiangong-1" re-entered Earth's atmosphere over the middle of the Pacific Ocean last night, and was burned up and destroyed. Although space junk falls back to earth all the time, this one was special as it was a first for China, and they apparently had lost control of the station, so that there was a tiny chance that it could have struck a populated area and harmed someone. For a while, it looked as though Chile and Argentina might be threatened, but in fact the craft had gone down several minutes earlier, and many hundreds of miles to the west.

In the grand scheme of things, the location was mildly amusing for two reasons. Although (again) hundreds of miles away, the craft DID go down in the general vicinity of, in the same part of the world as, Easter Island. Further south in the same ocean is Point Nemo, a lifeless patch of the Pacific which is commonly used as a spacecraft graveyard, on controlled re-entries.

>>9640124
I'm an amateur radio operator and I make radio contact with satellites all the time. It's not possible to contact a satellite unless you track its position in the sky (with software or a website similar to the ones people were using to track Tiangong-1 ITT) and properly orient your antenna toward its location as it moves across your sky.

Do you expect me to believe you over my own ears?

>>9640382
You forgot to mention the mysterious rise in altitude. Obviously a black ops craft nudged its trajectory so that it would land in the graveyard.

>>9640726
>I'm an amateur radio operator
wew lad

>>9641098
Reminder that there is literally nothing wrong with this, and that for less than $100 you, too, can singlehandedly track and contact satellites, proving empirically to your own eyes and ears the soundness of all the science assumed by orbital mechanics.
You can even predict and observe different doppler shifts from different locations, which cannot be faked in any flat-earth scenario.

>>9641164
>shilling

>>9641169
That's right, I get a commission if you buy [unnamed product]

>>9641038
Why would a black-ops satellite risk it's cover to STRATCOM, etc nudging a non-military spacecraft to Point Nemo?

>>9641173
Jokes on you, now I won't buy any products anymore so you don't get anything

>>9641164

Brainlet thinks satellites are orbiting a spherical earth using "gravity". Off to >>>/x/ with you, you imbecile.

>>9642286
I can verify the direction of motion and location of the satellite overhead by observing the doppler shift and the effects of changing antenna direction on signal strength. Look at how the frequency of the signal sweeps as the satellite passes its apex. You can't fake that, because it is different for every observer.
Based on these observations I can independently confirm the orbital parameters of any satellite that downlinks on a frequency that my radio can tune.

>>9642570
Neat

>>9642570
I'd point out you shouldn't reply to baiters, but hell that's really cool anon

>>9635197
t. Chubby chaser

>>9642406
Who are you replying to?