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Japanese Spacecraft Bringing Back Space Rock
phaic tan writes "Bridie Smith from the Sydney Morning Herald reports on the Hayabusa spacecraft returning to earth in June with samples from the Itokawa Asteroid: 'A Japanese spacecraft will land in Australia in June, bringing with it samples from an asteroid found 300 million kilometres from Earth. The unmanned Hayabusa spacecraft, launched in May 2003, will become the first spacecraft to bring asteroid material to Earth when it lands in Woomera, South Australia, later this year.'"
Picked another big island at least.. you know, in case the blob needs to be isolated. Al though I'd think if they landed in Japan at least Godzilla could melt it if it got too large. Oh well.
Oh, physical rocks. I thought at first this was about Acid Mothers Temple, the other Japanese Space Rock.
The more we can do without sending humans to do it in person, the faster exploration will progress.
"This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
There have been *so* many technical problems with this mission, such as failure of reaction wheels, loss of the rover during deployment, damage to the solar cells by a flare, loss of attitude and communications due to a fuel leak, and so on. The mission timeline reads like "And then this broke, and we managed to fix it. And then this, and we fixed that. And ..." Yet they are getting close to pulling off the main goals of the mission (sample return). A failure of the sampling procedure probably means they've got a bit of dust rather than the larger pieces they were hoping for, but it's better than nothing! And the pictures and other data the probe has returned are very cool. The asteroid is a "rubble pile", which had been speculated for many asteroids, but not directly seen before.
The engineers and scientists that are running the mission deserve a lot of credit for keeping this thing going despite the problems (the contractors that built it, not as much :-)).
If I recall correctly, the Hayabusa spacecraft MIGHT have samples on it from the asteroid. Then again, it might not. The Hayabusa was originally designed to hover above the surface of the asteroid and fire a pellet into the surface, causing an ejection of material that the probe would then collect in a sample box. However, the probe has been having propulsion issues, amongst other things, and was required to land on the surface of the asteroid rather than hover above it. This, of course, was an achievement in itself. However, upon landing, the probe's pellet ejection system failed and no surface material was displaced forcibly. As I understand it, researchers are hoping that some dust or something settled into the sample collection bin. However, at this time, there is no certainty that it will contain anything.
The most fascinating part about this mission, however, was the fact that it was using four plasma thrusters to steadily propel it to its destination. To my knowledge, this is the first time such technology has been used as the primary propulsion source for a mission. Even more fascinating is that three of the four thrusters failed and, as of now, one functioning thruster is a jury rigged hack job that they got working by using the control systems from one failed thruster and the thruster and propellant from a second. That said, Hayabusa has been an absolute testament to the tenacity and creativity in problem solving of JAXA. It has been an exciting mission, and I am very much looking forward to finding out just how lucky the unlucky probe has been in collecting dust bits from the asteroid.
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