What space junk??

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Profile LynnProject Donor
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Message 1737310 - Posted: 26 Oct 2015, 21:49:06 UTC

What debris due we have out there?

An Unknown Manmade Object is Headed for Earth

It's likely a rocket casing, but astronomers aren't for sure from where. All they know is that in three weeks, it will burn up over the Indian Ocean.

Earlier this month, an object called WT1190F​ was spotted on a trajectory that will bring it right to Earth. It came here from far beyond the moon, and its hollow nature and cylindrical shape suggest that it's human-made and not an asteroid or meteorite. It won't cause any major problems on the ground, but there's still something troubling: Astronomers don't know what the heck it is, or why it's only now coming up on their radar.

http://www.popularmechanics.com/space/news/a17915/unknown-space-debris-reentry/
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Message 1737369 - Posted: 27 Oct 2015, 1:34:39 UTC - in response to Message 1737310.  
Last modified: 27 Oct 2015, 1:35:07 UTC

Hope they get the math right . They better think about the I.S.S

It's big enough to do some damage if it hit it .

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Message 1737378 - Posted: 27 Oct 2015, 2:11:52 UTC - in response to Message 1737369.  

Nah, the mass density is so it will probably burn up pretty fast.
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Message 1737402 - Posted: 27 Oct 2015, 4:09:27 UTC

Maybe a panel from the Apollo 13 service module.
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Message 1737407 - Posted: 27 Oct 2015, 4:38:57 UTC
Last modified: 27 Oct 2015, 4:39:57 UTC

It is good that stuff is falling out of orbit and burning up. We have a space junk problem and it is getting worse over time. Every time two bits of space junk collide, they break into smaller and smaller pieces. Something the size of a pea, going at orbital velocity, could take out a satellite.

NASA now makes you submit a plan for eventually de-orbiting things you put into orbit, but back in the 60's and 70's they didn't care about this (although they should have!!!) Now there is lots of stuff up there breaking apart and becoming potential hazards to things we want to keep up there.
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Message 1737438 - Posted: 27 Oct 2015, 6:53:33 UTC - in response to Message 1737310.  
Last modified: 27 Oct 2015, 7:00:21 UTC

What debris due we have out there?

An Unknown Manmade Object is Headed for Earth

It's likely a rocket casing, but astronomers aren't for sure from where. All they know is that in three weeks, it will burn up over the Indian Ocean.

Earlier this month, an object called WT1190F​ was spotted on a trajectory that will bring it right to Earth. It came here from far beyond the moon, and its hollow nature and cylindrical shape suggest that it's human-made and not an asteroid or meteorite. It won't cause any major problems on the ground, but there's still something troubling: Astronomers don't know what the heck it is, or why it's only now coming up on their radar.

http://www.popularmechanics.com/space/news/a17915/unknown-space-debris-reentry/

only 2 things it can hit there is:
- Diego Garcia
- Maldives

but that one would burn down near Sri Lanka! ;)


EDIT: about space junk
https://youtu.be/19GomByyDQg?t=2m54s
:D

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Message 1739348 - Posted: 3 Nov 2015, 12:17:56 UTC
Last modified: 3 Nov 2015, 12:23:51 UTC

I don't think I would take too much notice of a magazine article in Popular Mechanics!

http://www.popularmechanics.com/space/news/a17915/unknown-space-debris-reentry/

only 2 things it can hit there is:
- Diego Garcia
- Maldives

but that one would burn down near Sri Lanka! ;)

OK, we wont bother telling the Seychelles, Mauritius, Christmas island, and Reunion then, and any others.

@Angela +1

The orbit of the ISS is regularly adjusted for height or if they detect a large piece of space junk heading their way. Only the Space Shuttle, and then Progress when docked to the aft of Zarya could reboost the station in the past. The station has the ability to boost itself, and is refueled by Progress.

They do it less frequently now that the station doesn't have to be low enough anymore to be in the Space Shuttle's reach.
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Message 1739353 - Posted: 3 Nov 2015, 12:59:53 UTC

all those islands combine is less than 0,1% of area of Indian ocean...so hit on them is a slight chance!

also, Space Watch said it would be near Sri Lanka...all those islands are some 1000km away... ;)

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Message 1739366 - Posted: 3 Nov 2015, 14:34:22 UTC - in response to Message 1739353.  

Ever heard of Tsunamis in your short life so far?
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Message 1739509 - Posted: 4 Nov 2015, 6:40:39 UTC - in response to Message 1739366.  

Ever heard of Tsunamis in your short life so far?

from a that small object...that would be first! :D

still remember 2004... ;)

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Message 1739532 - Posted: 4 Nov 2015, 9:12:59 UTC

The Boxing day Tsunami in 2004 off Sumatra was as a result of a mag 9.1 earthquake. We are not talking about anything like that of course. The main point here is that projected trajectories could change, and in any case there is shipping and cruise liners to take into account. A large chunk of rocket casing, if that is what it is, is not something to be in the path of!
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Message 1739563 - Posted: 4 Nov 2015, 10:53:58 UTC

Its not that big, or dense, so will probably never get anywhere near the surface, but will burn up "somewhere up there". While there might be a bit of a bang if one is in the right location there is little risk of a tsunami.

Physical characteristics
Dimensions 	0.7-2 meters
Mass 	250-2000 kg
Mean density	~0.1 g/cm³

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Message 1739609 - Posted: 4 Nov 2015, 14:32:38 UTC

Gosh, it might make a splash as big as when the lunar lander from Apollo 13 hit!
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Message 1739621 - Posted: 4 Nov 2015, 15:04:48 UTC

---some people get so excited over what is really quite a small object - I can't remember the figures but I think "2 ton lumps" are about a monthly event - and only a very small fraction of those get below a few miles into the atmosphere before they disintegrate and burn up completely.


(The Apollo along with other manned spacecraft are slowed in their decent by use of clever re-entry paths and, finally, parachutes.)
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Message 1739631 - Posted: 4 Nov 2015, 15:32:46 UTC
Last modified: 4 Nov 2015, 15:35:27 UTC

Space junk not disintegrated and burnt up completely.
http://io9.com/heres-what-our-space-junk-looks-like-after-its-crashed-1596339327
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Message 1739639 - Posted: 4 Nov 2015, 15:52:31 UTC

The vast majority of those objects were from sub-orbital "events", many are lower stages or aerodynamic nose cones that never reach orbital heights. You only have to look at the bits from the Delta 2 compared to one of the nose cones to see the difference. The Dela 2 tank has been at least into a near-orbital situation and is quite scarred, while the nose cones still have bright paintwork...
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Message 1739667 - Posted: 4 Nov 2015, 17:26:14 UTC - in response to Message 1739621.  

(The Apollo along with other manned spacecraft are slowed in their decent by use of clever re-entry paths and, finally, parachutes.)

Apollo 13 lunar lander wasn't, it was supposed to be 1/2 on the moon and 1/2 in lunar orbit. Of course all the command service modules had nothing to slow them. Nor did the shuttle when it broke up. Nor did skylab and a lot of other space junk. And you can even watch video of the shuttle boosters all the way until they hit water.

I mentioned Apollo 13 on purpose as this item of space junk seems to be in trans lunar orbit and will be coming in a bit faster than stuff in low earth orbit.
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Message 1741640 - Posted: 12 Nov 2015, 23:37:01 UTC - in response to Message 1739667.  

Left over from Apollo.

Space debris to collide with Earth on Friday the 13th

A mysterious piece of space debris called WT1190F is expected to enter Earth’s atmosphere near Sri Lanka Friday.

The piece of space debris is fittingly colliding with Earth on the unluckiest day on the calendar – Friday the 13th.

The object is believed to be a discarded rocket body and will likely enter Earth’s atmosphere from above the Indian Ocean around 11:49 local time or 1:19 a.m. E.T., according to the European Space Agency. In preparation for the object's entry, there is a no-fly zone order and no fishing will be allowed in the "Southern sea area" on Nov. 13, the Sri Lankan Ministry of Defense said in a statement earlier this week.

http://www.usatoday.com/story/news/nation-now/2015/11/12/space-debris-collide-earth-friday-13th/75651628/
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Message 1742115 - Posted: 14 Nov 2015, 19:27:23 UTC

Well this one burned up in the atmosphere. The Science Channel ran a program about the potential for disaster that exists in the space around the earth Friday night. Their biggest concern is the grouping of four Russian heavy launch boosters that are in orbit. If any two of those collide the space junk problem will explode into a nightmare.
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Message boards : Science (non-SETI) : What space junk??


 
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