DUARS Satellite Re-Entry: Impressive Light Show & Potential Debris Threat

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The UARS satellite is expected to re-enter Earth's atmosphere this weekend, moving faster than initially predicted. NASA estimates a 1-in-3200 chance of debris hitting someone on the ground, although this statistic is misleading as it reflects the likelihood of at least one person being hit globally. The satellite's trajectory covers a wide area, but the strike zone will narrow as the re-entry date approaches. Discussions among forum members include humorous suggestions for safety and the potential for an impressive light show during the satellite's descent. Overall, while the risk exists, the probability of any specific individual being struck remains extremely low.
  • #91
edward said:
The satellite appears to have an orbit that constantly changes??

That's due to the objects interaction with the Earth's incandesosphere slice. It's a hydrocarbon evolving collection of dense particulates forming an annular ring with concentric and uniform photonic properties that is localized around the gravitational maxima of the Earth's field. It produces orthogonal waves that can interact with the orbits of some objects. Johnny Cash once wrote a song about it.
 
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  • #92
QuarkCharmer said:
That's due to the objects interaction with the Earth's incandesosphere slice. It's a hydrocarbon evolving collection of dense particulates forming an annular ring with concentric and uniform photonic properties that is localized around the gravitational maxima of the Earth's field. It produces orthogonal waves that can interact with the orbits of some objects. Johnny Cash once wrote a song about it.

:biggrin:

Anyway wouldn't it be logical if the thing crashed close to the equator? Firstly it should have the strongest gravitational pull there due to the equatorial bulge, but probably more importantly, if the orbit height is in reference to the centre of the earth, the atmosphere is up to some km higher than at higher lattitudes.

Edit, obviously this would only be true in case of a circular orbit, not with an elliptic orbit.
 
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  • #93
Aren't there lots of old missile silos in the midwest? Maybe that would be a safe place to hide.
 
  • #94
So, is it safe to say, when the little satellite is no longer tracking we will know it by the real time updates of the orbit track ? Let's hope the blip doesn't go blank over Evo's home state.

Rhody...
 
  • #95
Evo has not made a reply in over 6 hours.

WHERE ARE YOU?[/size]
 
  • #96
arildno said:
Evo has not made a reply in over 6 hours.

WHERE ARE YOU?
Hopefully asleep in her usual accomodations.
 
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  • #97
QuarkCharmer said:
That's due to the objects interaction with the Earth's incandesosphere slice. It's a hydrocarbon evolving collection of dense particulates forming an annular ring with concentric and uniform photonic properties that is localized around the gravitational maxima of the Earth's field. It produces orthogonal waves that can interact with the orbits of some objects. Johnny Cash once wrote a song about it.

That is funny:smile: But it does have a constantly changing orbit.

http://reentrynews.aero.org/1991063b.html
 
  • #98
edward said:
That is funny:smile: But it does have a constantly changing orbit.

http://reentrynews.aero.org/1991063b.html

I was just playing off the news anchors "it will burn up in the fiery ring that surrounds the earth" commend from some posts above.
 
  • #99
Here's the approximate times you should worry:

Code:
1    21 Sep 2011 20:27:27.572    21 Sep 2011 20:29:34.531           126.959
2    22 Sep 2011 04:09:24.991    22 Sep 2011 04:11:35.665           130.675
3    22 Sep 2011 19:59:21.016    22 Sep 2011 20:01:16.917           115.901
4    23 Sep 2011 03:40:06.800    23 Sep 2011 03:42:07.761           120.961
5    23 Sep 2011 19:27:47.442    23 Sep 2011 19:29:15.944            88.502
6    24 Sep 2011 03:07:20.247    24 Sep 2011 03:08:56.825            96.578

Keep in mind that the duration is so short because I limited the elevation in order to only list the passes that have a reasonable chance of hitting you; not just any pass that might be barely visible on the horizon. Still, the longer the duration, the closer the satellite comes. The one tomorrow morning comes almost right overhead. If I were you, I'd get up early so I could duck.

If you're lucky, the UARS will hit you on the 23rd. The location of the satellite will be just right for the Sun to reflect off of it and you'll be able to see it coming. It could be a sight you'll remember for the rest of your life.

Well, unless instead of killing you, it just causes amnesia from a severe blow to the head, in which case, you wouldn't remember the sight at all.

Of course, also keep in mind the orbit is constantly changing and that this projection is based on an SGP4 propagation, which is too generic to be very accurate. As Edward mentioned, the orbit is constantly changing because the satellite is reaching the denser parts of the atmosphere (made even densor by the fact that we're in solar max). Not only is the orbit getting smaller and smaller, but the rate at which the orbit is getting smaller is increasing.

The higher precision propagation didn't go very well. It wouldn't propagate past today. But that just means the orbit is changing too fast to predict the orbit. It's definitely coming down soon, though.

Edit: I can't believe it! It passes over Evo several times over the next few days, while it just barely gets over the horizon in Colorado Springs! I don't get a single decent pass! How unlucky can a person get?
 
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  • #100
I say the "Bye Bye Evo" thread caused the PF outage all day today, what say the membership at large ??!

Rhody... :cry:
 
  • #101
BobG said:
Edit: I can't believe it! It passes over Evo several times over the next few days, while it just barely gets over the horizon in Colorado Springs! I don't get a single decent pass! How unlucky can a person get?
YAY EVO!

I could be there tomorrow Bob, you're not that far from me, if I drive fast! Then we can watch it together!
 
  • #102
Evo said:
YAY EVO!

I could be there tomorrow Bob, you're not that far from me, if I drive fast! Then we can watch it together!

You should. You'd like my house. The stairs are carpeted so it doesn't hurt as bad when you trip on them.
 
  • #103
I'll pour alcohol over your grave and bring flowers occasionally
 
  • #104
Evo said:
YAY EVO!

I could be there tomorrow Bob, you're not that far from me, if I drive fast! Then we can watch it together!

Your not in the clear yet some pretty big pieces will be coming down. NASA did the Re-entry risk assement in 2002??:eek:

Click on Re-entry risk assesment in the link below. Page 7. They have a lot of interesting data.

http://www.nasa.gov/mission_pages/uars/index.html
 
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  • #105
BobG said:
You should. You'd like my house. The stairs are carpeted so it doesn't hurt as bad when you trip on them.
Oh that's ok, when I fall downstairs, I bounce into the air, flip over facing the ceiling, and remain airborne, headfirst, until my skull stops my fall by smashing into the hard floor at the bottom.

None of that lame tumbling downstairs.
 
  • #107
Evo said:
Where will it be by this weekend? They're saying between Canada and the southern tip of south America. Is that wrong? (wouldn't be surprised).
Update: they've narrowed it down to somewhere between the North Pole and Antarctica.
 
  • #108
One way or another Evo, you'll be missed.
 
  • #109
Jimmy Snyder said:
One way or another Evo, you'll be missed.

...ah, Jimmy...:smile:
 
  • #110
Jimmy Snyder said:
One way or another Evo, you'll be missed.

:smile:

Hahahaha
 
  • #111
Rofl
 
  • #112
Jimmy Snyder said:
One way or another Evo, you'll be missed.
That's even better than "Cheer up, Harold (Camping). It's not the end of the world"
 
  • #114
Well, it's cooler than being eaten by mountain lions!:wink:
 
  • #115
Lisa! said:
Well, it's cooler than being eaten by mountain lions!:wink:
I don't know about that! Being eaten by a mountain lion in the rugged terrain of Mount Sunflower would be pretty cool.
 
  • #116
turbo said:
I don't know about that! Being eaten by a mountain lion in the rugged terrain of Mount Sunflower would be pretty cool.

I had a mountain lion eat my little brothers couch once. He still doesn't believe me.

But anyways, the latest news:

Now, in what NASA calls an “uncontrolled” re-entry — there is no more fuel to guide it — it will plop down somewhere on Friday afternoon, give or take a few hours.

In the meantime, #UARS has turned into a popular hashtag on Twitter. “I’m selling anti-satellite-debris umbrellas for $145 each,” one user wrote.

hmmm... I think it's a bit late to take up a collection for the Evo umbrella. Or does FedEx have same day service?
 
  • #117
Oh,well. I paid my share of her generous salary for many years and never got to sneak off to Bora Bora or any PF getaways for the secret brother/sisterhood. Yep! a new sub-forum with a secret handshake. It's a revolution.

Anyway, look over here (MIB flash!) Nothing to see here.
 
  • #118
Good news for Evo. Her chances of getting hit are decreasing.

On the other hand, my chances of getting hit are increasing. But the satellite would have to stay up until Sunday to pass really close to me, and that appears unlikely.

The picture shows the closest it will get to Evo (the red lines show how close it did get to Evo in the past). Time is Universal Standard Time, or about 7:20 PM 23 Sep Central Time.

Edit: Wow! I just noticed something. If it stays up until tomorrow night, my ex could get hit and I would have to stop making alimony payments.
 

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  • #119
BobG said:
Good news for Evo. Her chances of getting hit are decreasing.

On the other hand, my chances of getting hit are increasing. But the satellite would have to stay up until Sunday to pass really close to me, and that appears unlikely.

The picture shows the closest it will get to Evo (the red lines show how close it did get to Evo in the past). Time is Universal Standard Time, or about 7:20 PM 23 Sep Central Time.
It's coming for me!
 
  • #120
Opinions on the best site to go for up-to-date info as the time approaches? I keep hitting articles, none have any data or tracking apps.