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SpaceX launch today was third use of a first stage



 
 
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  #1  
Old December 3rd 18, 09:35 PM posted to sci.space.policy
Jeff Findley[_6_]
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Default SpaceX launch today was third use of a first stage

Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).

Jeff
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  #2  
Old December 4th 18, 12:15 PM posted to sci.space.policy
Rocket Man
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Posts: 23
Default SpaceX launch today was third use of a first stage

You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).

Jeff
--
All opinions posted by me on Usenet News are mine, and mine alone.
These posts do not reflect the opinions of my family, friends,
employer, or any organization that I am a member of.



  #3  
Old December 5th 18, 11:09 AM posted to sci.space.policy
Scott Kozel
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Posts: 10
Default SpaceX launch today was third use of a first stage

Buckshot satellites.

On Tuesday, December 4, 2018 at 7:15:21 AM UTC-5, Rocket Man wrote:
You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).



  #4  
Old December 5th 18, 11:18 AM posted to sci.space.policy
Rocket Man
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Posts: 23
Default SpaceX launch today was third use of a first stage

Many people think these satellites wil de-orbit in a couple of months, but
that's far from the truth. Most of them have been dropped in an orbit about
400km up and will take many decades to de-orbit. All the while, these dead
satellites pose an enormous risk for low-flying constellations of the
upcoming internet satelllites (OneWeb, SpaceX etc.).

"Scott Kozel" wrote in message
...
Buckshot satellites.

On Tuesday, December 4, 2018 at 7:15:21 AM UTC-5, Rocket Man wrote:
You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).





  #5  
Old December 5th 18, 11:54 AM posted to sci.space.policy
Scott Kozel
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Posts: 10
Default SpaceX launch today was third use of a first stage

Orbital life has relatively little to do with the size and weight of the
satellite. Air molecules are infinitesimally tiny compared to any satellite.

On Wednesday, December 5, 2018 at 6:18:12 AM UTC-5, Rocket Man wrote:
Many people think these satellites wil de-orbit in a couple of months, but
that's far from the truth. Most of them have been dropped in an orbit about
400km up and will take many decades to de-orbit. All the while, these dead
satellites pose an enormous risk for low-flying constellations of the
upcoming internet satelllites (OneWeb, SpaceX etc.).

"Scott Kozel" wrote in message
...
Buckshot satellites.

On Tuesday, December 4, 2018 at 7:15:21 AM UTC-5, Rocket Man wrote:
You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).




  #6  
Old December 5th 18, 08:46 PM posted to sci.space.policy
Fred J. McCall[_3_]
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Posts: 9,978
Default SpaceX launch today was third use of a first stage

"Rocket Man" wrote on Wed, 5 Dec 2018
12:18:10 +0100:

Is there some reason why you top post or are you just clueless?

Many people think these satellites wil de-orbit in a couple of months, but
that's far from the truth. Most of them have been dropped in an orbit about
400km up and will take many decades to de-orbit.


Nonsense! While orbital decay times depend on the precise orbital
elements, objects in 400 km orbits decay in about a year. To stay up
"many decades" they'd have to be 600 km or more high.


All the while, these dead
satellites pose an enormous risk for low-flying constellations of the
upcoming internet satelllites (OneWeb, SpaceX etc.).


Nonsense! This was a Brandenburg launch, which means they're probably
in polar orbits. By the time anyone seriously starts putting up
internet satellite systems they will all have decayed and reentered.

"Scott Kozel" wrote in message
...
Buckshot satellites.

On Tuesday, December 4, 2018 at 7:15:21 AM UTC-5, Rocket Man wrote:
You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).





--
"Ignorance is preferable to error, and he is less remote from the
truth who believes nothing than he who believes what is wrong."
-- Thomas Jefferson
  #7  
Old December 6th 18, 12:27 AM posted to sci.space.policy
Alain Fournier[_3_]
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Posts: 367
Default SpaceX launch today was third use of a first stage

On Dec/5/2018 at 15:46, Fred J. McCall wrote :
"Rocket Man" wrote on Wed, 5 Dec 2018
12:18:10 +0100:

Is there some reason why you top post or are you just clueless?

Many people think these satellites wil de-orbit in a couple of months, but
that's far from the truth. Most of them have been dropped in an orbit about
400km up and will take many decades to de-orbit.


Nonsense! While orbital decay times depend on the precise orbital
elements, objects in 400 km orbits decay in about a year. To stay up
"many decades" they'd have to be 600 km or more high.


Orbital decay also depends on the mass to effective area ratio. In this
case, since we are talking about small satellites, the mass to effective
area ratio should be small and therefore the satellites should decay
faster than more massive satellites.


Alain Fournier
  #8  
Old December 6th 18, 01:52 AM posted to sci.space.policy
Fred J. McCall[_3_]
external usenet poster
 
Posts: 9,978
Default SpaceX launch today was third use of a first stage

Spill Chucker changed 'Vandenberg' to Brandenburg.

Fred J. McCall wrote on Wed, 05 DEC 2018 13:46:05
-0700:

"Rocket Man" wrote on Wed, 5 Dec 2018
12:18:10 +0100:

Is there some reason why you top post or are you just clueless?

Many people think these satellites wil de-orbit in a couple of months, but
that's far from the truth. Most of them have been dropped in an orbit about
400km up and will take many decades to de-orbit.


Nonsense! While orbital decay times depend on the precise orbital
elements, objects in 400 km orbits decay in about a year. To stay up
"many decades" they'd have to be 600 km or more high.


All the while, these dead
satellites pose an enormous risk for low-flying constellations of the
upcoming internet satelllites (OneWeb, SpaceX etc.).


Nonsense! This was a Brandenburg launch, which means they're probably
in polar orbits. By the time anyone seriously starts putting up
internet satellite systems they will all have decayed and reentered.

"Scott Kozel" wrote in message
...
Buckshot satellites.

On Tuesday, December 4, 2018 at 7:15:21 AM UTC-5, Rocket Man wrote:
You mean an onerous number of small satellites.

"Jeff Findley" wrote in message
...
Today's SpaceX launch from Vandenberg AFB was the third launch and
landing of this particular stage. This is the first time that a stage
has been used more than twice.

The payload was numerous small satellites (I believe 64 total).



 




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