Hayabusa - The Return To Earth, The voyage home |
Hayabusa - The Return To Earth, The voyage home |
Nov 28 2005, 03:08 PM
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Member Group: Members Posts: 510 Joined: 17-March 05 From: Southeast Michigan Member No.: 209 |
...starting a new thread for Hayabusa's sampling feedback and the return voyage.
After its nail-biting success in November, will there be enough fuel for the Falcon to make it home? -------------------- --O'Dave
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Guest_BruceMoomaw_* |
Dec 14 2005, 02:33 AM
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Guests |
I very much doubt it will be around by then, and I'm afraid we will soon be able to add Hayabusa to Japan's almost unbroken modern record of space failures -- although at least it came a good deal closer to success than most of Japan's missions do. Space missions simply cannot be done on such low funding levels.
I shudder to report that -- according to the Nov. 28 Aviation Week -- JAXA has been taking its advice on how to reform its space program from Dan Goldin. |
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Dec 14 2005, 02:38 AM
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
So - would another nation be willing and able to recover Hayabusa or at least any samples it may have, or even take over its mission?
If the probe is going to hang around Itokawa for almost another year, will it continue to study the planetoid? -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Dec 14 2005, 10:46 AM
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Newbie Group: Members Posts: 14 Joined: 12-December 05 From: Petrozavodsk, Russia Member No.: 607 |
QUOTE (ljk4-1 @ Dec 14 2005, 06:38 AM) If the probe is going to hang around Itokawa for almost another year, will it continue to study the planetoid? Yes! They MUST do it, we all hope to see once more the Enigmatic Stone Garden of Itokawa |
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Dec 14 2005, 12:17 PM
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#5
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
*** JAXA MAIL SERVICE ***
Japan Aerospace Exploration Agency ---------------------------------------------------------------------- Status of the Hayabusa December 14, 2005 Japan Aerospace Exploration Agency Hayabusa spacecraft currently undergoes the recovery operation to resume the communication with the ground stations. It was hit by an abrupt disturbing torque owing to the fuel leak that occurred before, and has been out of the ground contact since December 9th. The project team has a good expect to have the spacecraft resume the communication soon. However, the project is now not so sure to make the spacecraft return to earth in June of 2007 and has decided to lengthen the flight period for three years more to have it return to the Earth in June of 2010. On December 8th, Usuda station observed the sudden shifts of the range-rate measurements at 4:13 UTC with the corresponding gradual decrease of signal intensity AGC (Automated Gain Controller) read. The measurement and the intensity change slowly and are currently estimated due to the out-gassing effect that derived from the fuel leak-out at the end of last month. The leak occurred on November 26th and 27th. Since the beacon signal communication resumed on 29th, the project has made an effort to exclude the vapor gas of the fuel from the spacecraft. The project has by now identified the out-gassing has successfully been performed, as its exponential acceleration decay has shown so far. On December 8th, the spacecraft was under the resume operation phase for the chemical propulsion, and was given a slow spin whose period is about six minutes. From the beginning of December, the project has introduced the Xenon gas thruster control strategy for emergency, replacing the chemical propulsion system. But the control capability of it was not enough strong for the spacecraft to withstand the disturbance on December 8th. Current estimation says the spacecraft may be in a large coning motion and that is why the spacecraft has not responded to the commands sent from the ground station. The spacecraft has been out of communication since December 9th. Analysis predicting the attitude property relating to both the Sun and Earth shows that there will be high possibility counted on for the resumption of the communication from the ground for several months or more ahead. However, the spacecraft may have to undergo another long term baking cycle before it starts the return cruise operation using ion engines aboard. And it is concluded that the commencement of the return cruise during December is found difficult. The project has determined that the return cruise should start from 2007 so that the spacecraft can return to the Earth in June of 2010, three years later than the original plan, as long as no immediate resumption tales place very soon. The spacecraft operation will shift from the normal mode to the rescue mode for several months to one year long. Long term predict indicates high probability of having the spacecraft communicated with the ground station again, with the spacecraft captured well in the beam width of the Usuda deep space antenna. The spacecraft will take the advantage of Xenon gas attitude control again after enough length of baking operation. The Xenon gas that remains is adequate for the return cruise devised by the ion engines carried by Hayabusa. The Hayabusa web page will report anything updated, as soon as it becomes available. (Supplement) Hayabusa Rescue Operation http://www.jaxa.jp/press/2005/12/20051214_...busa_e.html#sup This page URL: http://www.jaxa.jp/press/2005/12/20051214_hayabusa_e.html --------------------------------------------------------------------- Publisher : Public Affairs Department Japan Aerospace Exploration Agency (JAXA) Marunouchi Kitaguchi Building, 1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8260 Japan TEL:+81-3-6266-6400 JAXA WEB SITE : http://www.jaxa.jp/index_e.html -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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