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Location: UFOUpDatesList.Com > 2007 > Dec > Dec 5

Re: Skylab 3

From: Bruce Maccabee <brumac.nul>
Date: Tue, 4 Dec 2007 23:32:04 -0500
Archived: Wed, 05 Dec 2007 10:46:47 -0500
Subject: Re: Skylab 3 


>From: James Smith <lunartravel.nul>
>To: ufoupdates.nul
>Date: Tue, 4 Dec 2007 11:03:58 -0500 (GMT-05:00)
>Subject: Re: Skylab 3

>>From: Brad Sparks <RB47x.nul>
>>To: ufoupdates.nul
>>Date: Sun, 2 Dec 2007 02:10:14 EST
>>Subject: Re: Skylab 3

<snip>

>>>The number of Skylab debris items was about 23. There are three
>>>objects that re-enter in Sept 1973, so the orbital elements are
>>>likely useless. One of these re-enters on Sept 20, 1973, the day
>>>claimed for the odd photo. There is a possibility that this
>>>particular object is low enough in altitude to get heated up and
>>>glow red. Therefore, it could be self illuminated via heat
>>>radiation.

Yes, but it wouldn't be the "red" seen in the photos. It would
glow more like a 'blackbody' - think of very hot coals, more
orange than red - as the temperature during reentry gets very
high.

>>>This could not explain why the object got dark upon
>>>entering shadow unless there is fortuitous timing of the
>>>object's disintegration. Another possibility is that it is
>>>heating up and giving off gases/particles that catch the sun-
>>>light, increasing its effective size. Then fade out would match
>>>going in shadow.

>>Do you see any earth background in the Skylab red object photos?
>>Any trace of the earth's limb anywhere?? A re-entry occurs at
>>about 60-100 miles, far far below the Skylab at 273 miles
>>height.

>>The earth's limb was about 1,400 miles away from Skylab's
>>height. The only way a 60-100-mile high re-entry could be viewed
>>from Skylab against a black space background if it was about
>>1,400 miles away. But the earth's limb would be visible
>>immediately below the re-entry about 2 to 4 degrees below and the
>>burning object would be progressively falling still lower.
>>Garriott said the red object was "well above the horizon."

Since the object was first seen 10 minutes before the shadow
boundary, and considering that there is no evidence of the earth
in the photos, an object at lower altitude that was glowing due
to reentry heating would have to be far _ahead_ of the Skylab.

Furthermore, I can't imagine how the astronauts would have
thought it was anything other than a reentry if they saw it
streaking along.

>Yes, you make sense. I'll have to think about this. The other
>thing to consider is that the degraded re-entry orbit may place
>it near Skylab,but prior to actual burn-up/glow. No way to say.

>>>I do not have a feel for how long such heating up and glowing
>>>could occur (if even possible) but it would seem to take some
>>>time (~10 minutes) if the objects are made of metal (rather than
>>>how meteors generally rapidly burn up due to high angles they
>>>enter the atmosphere with usually).

>>Re-entries take 2-3 minutes, not 10 minutes, and travel nearly
>>horizontally about 600 to 900 miles - a movement not seen by the
>>Skylab astronauts or evidenced in the photos which do not show a
>>flaming streak.

>Do you have a reference for this? I mean when does "glow" start
>and how long it takes till it hits the ground.

When it hits the ground is not relevant since it stops glowing
brightly long before then. Stops glowing brightly at least by
the time it reaches 8 - 10 miles (more likely 20 miles) because
the fall slows it and cooling increases as the atmosphere gets
thicker.



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