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TOPIC: HAYABUSA (MUSES-C) mission
Blobrana


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RE: HAYABUSA (MUSES-C) mission
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A 510-kilogram space probe will "collide" with our home planet in June 2010 to simulate an approaching asteroid, Japanese scientists have announced.
The Hayabusa spacecraft is currently on its way back to Earth after a successful mission that landed on and hopefully collected samples from the asteroid Itokawa.

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Blobrana


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Space probe to help track risky asteroids
Hayabusa, a Japan Aerospace Exploration Agency space probe used for research on Itokawa, a near-Earth asteroid, is to be used to develop a system to help predict the orbits of asteroids that could collide with Earth, the agency said.
Hayabusa has been placed in an orbit in which it could return to Earth in June next year unless it burns up in the atmosphere. As the probe will almost certainly tumble into the atmosphere like an asteroid, it is hoped it can be used to provide some idea of the accuracy of the system used to predict the course along which such a small celestial object can hit Earth.

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Blobrana


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Japan's beleaguered space probe Hayabusa, which may or may not have collected samples of an asteroid, fired up its engine Wednesday to resume its trip back to Earth.

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Blobrana


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Japan's beleaguered space probe Hayabusa, which may or may not have collected samples of an asteroid, fired up its engine Wednesday to resume its trip back to Earth.
After more than a year coasting through space, Hayabusa reignited its ion-powered engine to begin the second leg of what has become an extra-long trek home from the asteroid Itokawa, said officials with the Japanese Aerospace Exploration Agency.

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Blobrana


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HAYABUSA mission
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The Japan Aerospace Exploration Agency is doing its best to operate the Asteroid Explore "HAYAUBSA" to return it to Earth in June 2010. After leaving the orbit around the asteroid "ITOKAWA," the ion engine of the HAYABUSA was cut off on Oct. 18, 2007 (Japan Standard Time, JST) to complete the first phase orbit manoeuvring for returning to the Earth. Since then, the HAYABUSA has been in a coast flight, but today we reignited the ion engine for a powered flight at 11:35 a.m. (JST) after activating its reaction wheel and establishing the three axis attitude control.
We will continue to gradually accelerate the HAYABUSA until around March 2010 to carry out the second phase orbit manoeuvring for returning it to the Earth.
From April to June 2010, we will guide the HAYABUSA, which will have reached much closer to the Earth by then, to further come near to the earth's orbit with higher accuracy, and plan to carry out the re-entry of its capsule into the atmosphere in June 2010.
The total accumulated operation time of the ion engine reached 31,000 hours, and the total engine generation for orbit manoeuvre(*1) was 1,700 meters per second (m/s) to date. The HAYABUSA still has enough thrust power and propellant. Some 400 m/s more of engine generation for orbit manoeuvring is necessary for returning to the Earth. We are continuing to pay careful attention to our onboard equipment and are doing our utmost to operate the HAYABUSA with the greatest care.

(*1) engine generation for orbit manoeuvre: volume of acceleration by an ion engine
JAXA Press Release

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Blobrana


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RE: HAYABUSA (MUSES-C) mission
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The Japan Aerospace Exploration Agency says that is doing its best to operate the Asteroid Explore "HAYAUBSA" to return it to Earth in June 2010. After leaving the orbit around the asteroid "ITOKAWA," the ion engine of the HAYABUSA was cut off on Oct. 18, 2007 (Japan Standard Time, JST) to complete the first phase orbit manoeuvring for returning to the Earth.
Since then, the HAYABUSA has been in a coast flight. On 4th JAXA reignited the ion engine for a powered flight at 11:35 a.m. (JST) after activating its reaction wheel and establishing the three axis attitude control. The agency will continue to gradually accelerate the HAYABUSA until around March 2010 to carry out the second phase orbit manoeuvring for returning it to the Earth.

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Blobrana


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Successful re-ignition of Ion Engine C onboard Hayabusa
Hayabusa spacecraft had been on the way to Earth with the ion engines B and/or D powered on since April 2007, though it lost the functions of chemical thrusters and two of three reaction wheels at the proximity operation around the asteroid. At the rescue operation in 2006 the ion engine C was not confirmed to exhaust the plasma jet. On July 28, 2007 a series of the restoration works and a new operation sequence revived the ion engine C again, which are accelerating Hayabusa on behalf of the engines B and D aiming for the Earth return on 2010. Sharing the delta-V duty among the multiple engines will secure a safety flight for the homeward journey.

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Japan's problem-plagued Hayabusa spacecraft has begun its return to Earth, but whether it can complete the planned three-year journey is far from certain, say Japanese media reports.
If the craft does return as planned in 2010, researchers would finally find out whether it collected the first-ever samples from an asteroid during its two landings on the tiny space rock Itokawa

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25143 Itokawaview_03
Expand (147kb, 1024 x 768)

See shape models of 25143 Itokawa http://hayabusa.sci.isas.jaxa.jp/shape.pl

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Public release of the Hayabusa data archives
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The Hayabusa spacecraft, which was launched in May 2003, arrived at Asteroid Itokawa in September 2005, and it made observations of Itokawa and tried touch down in about three months.
Hayabusa has four scientific instruments, that is Multi-Spectral Telescopic Imager (AMICA), Laser Altimeter (LIDAR), Near-Infrared Spectrometer (NIRS), and X-ray Fluorescence Spectrometer (XRS). The data obtained by these instruments were firstly analysed by Hayabusa Science Team and some of the results have been published as scientific papers. At the same time, the science team was preparing to open them to the public and this work has almost been done. Therefore the science team release the data archives to public from April 24, 2007. All the scientific data that Hayabusa obtained are open to the public.

The Hayabusa data archives can be accessed from the following web site: http://hayabusa.sci.isas.jaxa.jp  
 The data in the archives are mainly for scientific use. The web site is written in English for the access of researchers in all over the world.

Following data can be obtained:

AMICA: More than 1600 images taken by using wide-band filters of visual, near-ultraviolet, and near-infrared. The image of whole Itokawa and close-up view of the surface of Itokawa as well as the earth and the moon at the earth swinby.
NIRS: About 120,000 spectral data in the near infrared. Mainly the spectra of the reflected sun light from the surface of Itokawa, but also the spectra of the earth, the moon, Mars, Jupiter, and Saturn.
LIDAR: The data of distance from Hayabusa to the surface of Itokawa obtained by using LASER light. About 1.7 million points data are available.  
XRS: about 15,000 spectral data in X-ray. The fluorescence X-ray emitted from the surface of Itokawa by the solar X-ray.  
SPICE: the position and attitude data of Hayabusa spacecraft
Shape Model: Very precise shape model of Itokawa created by using the data obtained by Hayabusa

Source Japan Aerospace Exploration Agency (JAXA)

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