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A comment on Falcon Heavy Demonstration Mission [pdf].

Re:Falcon Heavy Demonstration Mission [pdf] by dylan604 on Tuesday February 06, 2018 @01:00PM (#16318014)
I saw the video animation of the Tesla separating from the second stage. At that point, the car no longer has thrust, so I'm assuming they've calculated the thrust to be just enough to reach Mars and to be able to fall into orbit. To quote the movie Apollo 13, "we've just put Isaac Newton in the driver's seat". I dearly hope that Musk and team have been referring to the "dummy" in the driver's seat of the Tesla as Isaac.
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Re:Falcon Heavy Demonstration Mission [pdf] by dzdt on Tuesday February 06, 2018 @01:04PM (#16318041)
They aren't aiming for Mars orbit. As far as I can tell, they aren't even aiming to come close to Mars. Instead (as far as I can tell) they are aiming to come close to the orbit of Mars, i.e. where Mars will be in 4 or 5 months.
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Re:Falcon Heavy Demonstration Mission [pdf] by zaroth on Tuesday February 06, 2018 @01:29PM (#16318243)
Wait, wait wait. If they aren't putting the Tesla into actual orbit, then what about--50 years from now--when they run into a situation on Mars Base Alpha where the only possible solution to an imminent cascading system failure is to dock with the orbiting Roadster and harvest a crucial part from the drivetrain in order to repair their reactor and save the base?!
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Re:Falcon Heavy Demonstration Mission [pdf] by apeace on Tuesday February 06, 2018 @01:13PM (#16318118)
> Following launch, Falcon Heavy’s second stage will attempt to place the Roadster into a precessing Earth-Mars elliptical orbit around the sun.
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Re:Falcon Heavy Demonstration Mission [pdf] by ogre_magi on Tuesday February 06, 2018 @01:21PM (#16318183)
That's not Mars orbit. It's an orbit around the sun with perihelion ~1AU (distance the Earth orbits) and aphelion ~1.5AU (distance Mars orbits [avg]).
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Re:Falcon Heavy Demonstration Mission [pdf] by api on Tuesday February 06, 2018 @01:06PM (#16318057)
So basically they're just throwing a car into space.
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Re:Falcon Heavy Demonstration Mission [pdf] by ogre_magi on Tuesday February 06, 2018 @01:22PM (#16318189)
Into deep space. This will be SpaceX's first flight beyond Earth orbit.
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Re:Falcon Heavy Demonstration Mission [pdf] by grecy on Tuesday February 06, 2018 @02:10PM (#16318628)
It will be the first commercial space flight beyond Earth orbit
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Re:Falcon Heavy Demonstration Mission [pdf] by losteric on Tuesday February 06, 2018 @01:37PM (#16318309)
iirc, they are aiming for Mar's orbit... the general public just thinks that means orbiting Mars.
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Re:Falcon Heavy Demonstration Mission [pdf] by garmaine on Tuesday February 06, 2018 @01:10PM (#16318087)
Yes.
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Re:Falcon Heavy Demonstration Mission [pdf] by garmaine on Tuesday February 06, 2018 @01:10PM (#16318084)
Reading the OPs link it looks like that animation may have had some dramatic license. They are going to do two more mid coarse corrections on the way to “Mars” if I am reading it right. Of course the red planet won’t actually be there on the other side when they get there.

Also note that you can’t “fall into orbit” around Mars, at least not with this sort of trajectory and without an aero rake heat shield. A real mars mission would require a third stage reignition for Mars orbital insertion.

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Re:Falcon Heavy Demonstration Mission [pdf] by gnode on Tuesday February 06, 2018 @02:25PM (#16318762)
When / if the Tesla nears Mars, it'll be going at escape velocity, and so won't enter orbit. So unless lithobraking is employed, it'll fly straight by, and remain in an orbit around the sun.

Continuing the homage to David Bowie, the dummy driver is called Starman.

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Re:Falcon Heavy Demonstration Mission [pdf] by mstank on Tuesday February 06, 2018 @01:07PM (#16318066)
From what I understand it won't reach or orbit Mars (not in a current transfer window). It will attempt an approximate Mars-like Hohmann transfer orbit and continue orbiting around the Sun indefinitely.
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