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SATELLITE RE-ENTRY: The ROSAT X-ray Observatory
NASA Space News ^ | Saturday, Oct. 15, 2011 | Dr. Tony Phillips

Posted on 10/15/2011 2:28:34 AM PDT by LucyT

The ROSAT X-ray observatory, launched in 1990 by NASA and managed for years by the German Aerospace Center (DLR), will return to Earth within the next two weeks. Current best estimates place the re-entry between Oct. 22nd and 24th over an unknown part of Earth.

[snip]

According to a DLR study, as many as 30 individual pieces could survive the fires of re-entry. The largest single fragment would likely be the telescope's mirror, which is very heat resistant and may weigh as much as 1.7 tons.

(Excerpt) Read more at spaceweather.com ...


TOPICS: Astronomy; Science; Society
KEYWORDS: falling; satellite
Objectives included studying X-rays given off by the coronae of stars, and locating and mapping X-rays given off by the remains of supernovae occurring in the Milky Way galaxy.
1 posted on 10/15/2011 2:28:39 AM PDT by LucyT
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To: Berlin_Freeper; Hotlanta Mike; Silentgypsy; repubmom; HANG THE EXPENSE; Nepeta; Bikkuri; Plummz; ...

According to a DLR study, as many as 30 individual pieces could survive the fires of re-entry.

The largest single fragment would likely be the telescope's mirror, which is very heat resistant and may weigh as much as 1.7 tons.

2 posted on 10/15/2011 2:33:22 AM PDT by LucyT
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To: LucyT
A one-amd-a-half ton, heat resistant frisbee hitting our thick and heavy atmosphere at some thousands of miles per hour,

I want to see THIS catch.

3 posted on 10/15/2011 2:34:47 AM PDT by knarf (I say things that are true ... I have no proof ... but they're true)
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To: LucyT
Between 22nd and 24th October? Remind me to stay in my bunker...


4 posted on 10/15/2011 2:49:14 AM PDT by Fred Nerks (FAIR DINKUM!)
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To: LucyT

With tens of thousands of pieces of space junk eventually falling to Earth, sooner or later one will hit a metro area.

Then what? Oh, that’s right, can’t sue the gubmint.


5 posted on 10/15/2011 5:12:48 AM PDT by wolfcreek (Perry to Obama: Adios, MOFO!)
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To: LucyT

I guess we know all we need to know so we can let it be destroyed...


6 posted on 10/15/2011 6:04:25 AM PDT by Mr. K (Sarah you broke my heart~!! Endorse Cain and all is forgiven)
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To: LucyT

Track: http://www.n2yo.com/?s=20638
Passes (based on your IP location): http://www.n2yo.com/passes/?s=20638


7 posted on 10/15/2011 6:09:54 AM PDT by coloradan (The US has become a banana republic, except without the bananas - or the republic.)
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To: LucyT

Not big enough to flatten mecca. *sigh*


8 posted on 10/15/2011 6:17:31 AM PDT by null and void (Day 997 of America's holiday from reality...)
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To: LucyT

Another tracking site: http://heavens-above.com/


9 posted on 10/15/2011 6:28:05 AM PDT by bgill (There, happy now?)
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To: null and void

The “Holy City” of Qom Iran, or Musudan Village in N.Korea would be good for starters. And maybe the Castro District of San Francisco. etc. etc. etc.


10 posted on 10/15/2011 6:56:11 AM PDT by AmericanInTokyo (Herman Cain will be the nominee of the GOP! The momentum is unmistakeable. The Dems/RINOs hate it.)
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To: AmericanInTokyo

So many targets, so few falling satellites...


11 posted on 10/15/2011 6:57:13 AM PDT by null and void (Day 997 of America's holiday from reality...)
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To: Fred Nerks
I've wanted to take one of those and turn it into an underground house. The walls are ‘feet’ thick of reinforced concrete usually, with a connected labyrinth of tunnels.
12 posted on 10/15/2011 7:04:04 AM PDT by MHGinTN (Some, believing they can't be deceived, it's nigh impossible to convince them when they're deceived.)
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To: null and void

Bwahahaha


13 posted on 10/15/2011 7:05:25 AM PDT by MHGinTN (Some, believing they can't be deceived, it's nigh impossible to convince them when they're deceived.)
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To: null and void

1.7 tons falling from outer space would hit with a pretty big bang.
Mecca would be messed up....what irony that would be


14 posted on 10/15/2011 12:08:11 PM PDT by Yorlik803 (better to die on your feet than live on your knees.)
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To: Yorlik803

Sayyyyyy, isn’t it hajj season?


15 posted on 10/15/2011 7:08:00 PM PDT by null and void (Day 997 of America's holiday from reality...)
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To: null and void; Fred Nerks; MHGinTN

Will ROSAT fall to earth in one big thud, or enter at an angle and skip a few times before coming to a halt?

(Like a stone skipping on water.)


16 posted on 10/16/2011 1:03:26 AM PDT by LucyT
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To: Berlin_Freeper; Hotlanta Mike; Silentgypsy; repubmom; HANG THE EXPENSE; Nepeta; Bikkuri; Plummz; ...
Image and video hosting by TinyPic

ROSAT DECAY UPDATE: The massive ROSAT X-ray space telescope continues to descend toward Earth. Latest estimates place the re-entry around noon Universal Time on Oct. 23rd.

Uncertainties exceed 10 hours, which makes it impossible to say exactly where ROSAT will re-enter. Many sky watchers are seeing ROSAT in the night sky shining about as brightly as a 1st magnitude star. Check Spaceweather's Satellite Tracker for local flyby times.

17 posted on 10/17/2011 6:59:19 PM PDT by LucyT
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.

Atlantic Standard Time (AST) = UT - 4 hours
Eastern Standard Time (EST) = UT - 5 hours
Central Standard Time (CST) = UT - 6 hours
Mountain Standard Time (MST) = UT - 7 hours
Pacific Standard Time (PST) = UT - 8 hours

If Daylight Saving Time is in effect in the time zone, you must ADD one hour to the above standard times.

.


18 posted on 10/17/2011 7:06:28 PM PDT by LucyT
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To: All

Wednesday, Oct. 19, 2011

ROSAT DECAY UPDATE: The doomed ROSAT X-ray space telescope continues to descend toward Earth.

Multiple experts agree that re-entry should occur on Oct. 23rd, with most favoring the early hours of the day.

With uncertainties exceeding 8 hours, however, it is still impossible to say exactly where ROSAT will disintegrate.


19 posted on 10/19/2011 7:04:33 AM PDT by LucyT
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To: Berlin_Freeper; Hotlanta Mike; Silentgypsy; repubmom; HANG THE EXPENSE; Nepeta; Bikkuri; Plummz; ...
Image and video hosting by TinyPic

German Aerospace Center, DLR

On Sunday, 23 October 2011, between 1:45 UTC (3:45 CEST) and 2:15 UTC (4:15 CEST) the German ROentgen SATellite ROSAT has re-entered Earth's atmosphere.

There is currently no confirmation if pieces of debris have reached Earth's surface.

20 posted on 10/22/2011 9:51:52 PM PDT by LucyT
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To: Fred Nerks; Berlin_Freeper

.

Europe, Africa and Australia appeared to be out of the path of the Roentgen Satellite, the agency said late Saturday. It was not immediately clear where the satellite entered the atmosphere.

“The largest single fragment will probably be the telescope’s mirror, which is very heat resistant and may weigh up to 1.7 tons,” according to the German Aerospace Center.

“The likelihood of a person getting injured as a result of the re-entry is extremely low,” the agency said.

Fragments could fall to Earth in about a 50-mile-wide (80-kilometer-wide) path as the satellite enters the atmosphere at 17,398 mpg (28,000 kph) and breaks up under extreme heat, the agency said earlier.

The satellite’s orbit extends to 53 degrees northern and southern latitude, officials said.


21 posted on 10/22/2011 10:23:01 PM PDT by LucyT
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Oops, forgot to credit CNN with that last bit of information.


22 posted on 10/22/2011 10:24:17 PM PDT by LucyT
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More:

“There is a big difference between entering Earth’s atmosphere, and hitting the surface. That time can be from a few minutes at a steep angle of entry, to an hour or more at shallow angles. It, or at least some of it, is probably still up there.”


23 posted on 10/22/2011 10:43:04 PM PDT by LucyT
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Down in Mongolia?


24 posted on 10/22/2011 10:44:44 PM PDT by LucyT
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Saturday, 22 October 2011 22:56
Germany’s ROSATsatellite has reentered. The German Aerospace Center (DLR) said in a tweet that there is no confirmation of debris reaching the Earth’s surface.

Reentry occurred between 1:45 and 2:15 GMT October 23 (9:45 - 10:15 pm EDT October 22) according to DLR.


25 posted on 10/22/2011 10:53:33 PM PDT by LucyT
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To: LucyT

So...what goes up must come down, and as luck would have it, this one burnt up on re-entry.


26 posted on 10/23/2011 12:11:17 AM PDT by Fred Nerks (FAIR DINKUM!)
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To: Fred Nerks

Fred’s safe. It didn’t land on my head. So, guess they’re keeping it secret.


27 posted on 10/23/2011 6:05:48 AM PDT by bgill (There, happy now?)
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