Author Topic: NASA builds asteroid capture mission definitions  (Read 24613 times)

Offline newpylong

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Re: NASA builds asteroid capture mission definitions
« Reply #60 on: 04/08/2014 01:19 AM »

Ya didn't get what I meant. If the Orion SPS is used to get out of earth orbit it will most likely not have enough propellant to make the return burn.

It does have storable propellant and a restartable main engine.

Then the Orion Service Module will either need larger fuel tanks for the return trip to EML-1 or to refuel.  The extra work and cost of handling the fuel will need planning in.

Why? If it happens at all it's going straight there on an SLS upper stage, just like Apollo on the S-IVB. It only needs it SPS to get home.

Offline A_M_Swallow

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Re: NASA builds asteroid capture mission definitions
« Reply #61 on: 04/08/2014 07:55 AM »

Why? If it happens at all it's going straight there on an SLS upper stage, just like Apollo on the S-IVB. It only needs it SPS to get home.

Only if the SLS is still around.  Clongton was asking about using a different LV such as a Falcon Heavy.

Offline A_M_Swallow

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Re: NASA builds asteroid capture mission definitions
« Reply #62 on: 04/08/2014 07:58 AM »

Then the Orion Service Module will either need larger fuel tanks for the return trip to EML-1 or to refuel.  The extra work and cost of handling the fuel will need planning in.

No, neither are in the plans

I had guessed that.  I suspect using a Delta IV Heavy instead of the SLS is not in the current plans either.

Offline Robert Thompson

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Re: NASA builds asteroid capture mission definitions
« Reply #63 on: 04/18/2014 06:43 PM »
http://phys.org/news/2014-04-astronauts-reveal-sobering-asteroid-impacts.html
"... This network has detected 26 multi-kiloton explosions since 2001, all of which are due to asteroid impacts. It shows that asteroid impacts are NOT rareóbut actually 3-10 times more common than we previously thought. The fact that none of these asteroid impacts shown in the video was detected in advance is proof that the only thing preventing a catastrophe from a 'city-killer' sized asteroid is blind luck. ..."

Offline A_M_Swallow

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Re: NASA builds asteroid capture mission definitions
« Reply #64 on: 04/18/2014 07:20 PM »
http://phys.org/news/2014-04-astronauts-reveal-sobering-asteroid-impacts.html
"... This network has detected 26 multi-kiloton explosions since 2001, all of which are due to asteroid impacts. It shows that asteroid impacts are NOT rareóbut actually 3-10 times more common than we previously thought. The fact that none of these asteroid impacts shown in the video was detected in advance is proof that the only thing preventing a catastrophe from a 'city-killer' sized asteroid is blind luck. ..."


26 multi-kiloton explosions without any one being killed seems very lucky.

26/(2014 - 2001 + 1) = 1.86 about 2 asteroids a year

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