Author Topic: Asteroid missions: be patient, or bring lotsa gas  (Read 1634 times)


Offline kkattula

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Re: Asteroid missions: be patient, or bring lotsa gas
« Reply #1 on: 03/27/2007 03:20 PM »
Very interesting.  With those sort of entry & exit delta v's, and the limited opportunities, Deimos and Phobos look much more appealing. Especially as a Mars landing pre-cursor. From escape velocity, Phobos is 1100 m/s to get there and 1900 m/s to get back (using air breaking at Mars & Earth), Deimos is 1300 m/s to get there and 1800 m/s to get back (using air breaking at Mars & Earth). Of course mission duration would be a lot longer.

Offline aftercolumbia

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Re: Asteroid missions: be patient, or bring lotsa gas
« Reply #2 on: 03/27/2007 08:33 PM »
Gaiashield was patient, it wasn't expecting such a mission to be short.  One of the things I can see happening, is that the easier a NEO is to get to, the longer its sydonic period is going to be, which translates into a longer mission, or one that is rather hard on fuel (say, launch to asteroid early in Type I window on a relatively fast transfer, stay there for a few days, and then launch in the asteroid's associated return window.)

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