Return of the Falcon
The story of "Hayabusa",
a spacecraft to explore an asteroid

祈 り
小惑星探査機 はやぶさ の物語

■World of asteroid
Speaking of an asteroid, what does that bring to your mind? A tiny celestial body, a celestial body like stone, the Little Prince’s home?
Since an asteroid could only be seen as a tiny dot, even if we observed it through a large
telescope from the earth, we didn’t know its shape until only a short while ago. However,since the early 1990s, because spacecraft became able to get close to asteroids, we have
gradually come to know the real nature of asteroids.
All asteroids, whose images were taken by spacecraft in the past, have a form far from being round in shape with many craters that can be seen on the surface. On implicit recognition, it was believed that an asteroid was probably such a thing. The “Hayabusa” squashedthis implicit recognition.
About how many asteroids are there? In fact, the total number is yet unknown because weare in the stage where new asteroids are being discovered one after another. At the beginning of 2007, there were 350,000 asteroids whose orbits were confirmed. Itokawa is one ofthem. However, it is a small asteroid whose size is only about 500m.
Asteroids are considered to becelestial bodies, which maintain
information of the solar systems
birth and its subsequent evolution. By understanding Itokawa,
we may be able to see remote
events in the solar system.
GaspraIda and its satellite Dactyl

The asteroids which spacecraft
visited before: Gaspra is 20km
in size, 40km for Eros, about
60km for Ida and Mathilde, andthose are quite big comparedto Itokawa. Dactyl, a satellite ofIda, is 1.6km in size. (The images are from NASA/JPL)

Mathilde

Eros

Asteroid Itokawa

The asteroid Itokawa was discovered by LINEAR (Lincoln Near-Earth Asteroid Research) project in the
US on September 26, 1998. It is a typical near-earth asteroid, which intersects the orbit of the earth.
At ﬁrst, it was called 1998 SF36 as a tentative name (provisional designation), but it was actively observed because it became an intended asteroid to explore. Thus, its orbit was soon determined accurately, and the number 25143 was given in June 2001. Since an asteroid can have a name once it getsa number, the Institute of Space and Astronautical Science (ISAS) of that time asked the LINEAR project to name it Itokawa, and it was accepted. Eventually, the name of Itokawa was ofﬁcially granted by
the International Astronomical Union (IAU). Needless to say, it was named after the late Dr. Hideo Itokawa, the father of the Japanese rocketry. It was in 1955 when Dr. Itokawa carried out the ﬁrst test
launch of the Pencil Rocket. Exactly 50 years later, Hayabusa launched by the M-V-5 rocket reached
the asteroid Itokawa.

1

■“HAYABUSA”spacecraft
The Hayabusa spacecraft
car ries various high-techequipment in its small body.
Even with its solar paddles
open it is only 5m in size. The
body is box shaped whose
width is about 1m, and weighs
only about 500kg. Such a tiny
thing can travel as far as several billion kilometers. Naturally, once it departs, people
cannot go to repair it even if
there is some trouble. It has
only itself and the radio signal
from the earth to rely on.

Ion engine

Sampler hone

Target marker

CapsuleIt controls the orbit of spacecraft by jetting out plasma of
xenon at high speeds. Large
acceleration can be obtainedwith a light mass because theelectric power generated by
the solar cells becomes anenergy source.

It is released before landing
and becomes a mark on theasteroid surface. When aflash bulb installed in thespacecraft is ignited, thecamera on the spacecraft
takes images of the whiteglisten reflected from themarker, thus helping thespacecraft recognize its own
location.

At the moment of touching
the surface of the asteroid, abullet is ejected in the honeand it crushes the surface of
the asteroid. The smashedfragments rise in the hone
and are stored in the case of
the spacecraft. The time during which it touches the surface is only several seconds.
energy source.

The case containing surface
materials is conveyed into a
capsule and the lid is shut.
When the spacecraft returns
to the earth, the capsule will
be separated, reenter the atmosphere, and eventually thecapsule will parachute down
to the earth.

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■Big voyage●May 9, 2003 : Launch

Hayabusa is a small asteroid explorer, originally called MUSES-C. It was launched by the
M-V-5 rocket from the Uchinoura Space Center in Kagoshima Prefecture at 13:29:25 on May
9, 2003. It was a successful launch, and the MUSES-C spacecraft was renamed Hayabusa (falcon in English). Hayabusa began a journey to the vast outer space.
After the launch, while it was working hurriedly, such as
deploying solar paddles and extending the sampler hone,
Hayabusa was swiftly moving out from the earth. Moreover,it also lit off the newly developed ion engines and graduallychanged its orbit. However, the orbit of Hayabusa in the firstyear looked almost the same as the one of the earth. Yet,
Hayabusa was accumulating energy into the orbit by firing
its ion engines during the first one year.
Hayabusa has four ion engines. One of them is a backup.
Since the power generated by the solar cells is different depending on the distance from sun, the ion engines work in
the one to three ranges according to the level of power generation.
●May 19, 2004 : Earth swing-by

About one year after the launch, Hayabusa returnedto the earth on May 19, 2004. This is because of theearth’s swing-by for orbit control by using the earth’s
gravity. At 15:21:42 (Japan time), Hayabusa approached an altitude of about 3,700km over the Pacific
Ocean. It passed through a place only about 1km awayfrom the scheduled point. At this time, the orbit was
obviously changed due to accumulated energy in theorbit by ion engines. It altered into the orbit similar tothat of the asteroid Itokawa.

Born of Hayabusa
The orbit from launch toarrival at the asteroid

Asteroid
Itokawa(1998 SF36)
Asteroid
arrival(2005.9.12)

Launch(2003.5.9)

Hayabusa

Sun

Earth

Earth swing-by(2004.5.19)

Orbit during earth swing-by

:52

:32
15

15:22

2
15:1

15



2

to the earth:4

Termination of visibility
from Japan
Closest approach

15

:0

2

14

The spacecraft entersthe earth’s shadow

The earth image taken during
the earth swing-by

●July 29, 2005 : We could see Itokawa

After the earth swing-by, the ion engines continuously worked. Then,in July 2005, Hayabusa went into the state of “conjunction,” whichmeans that Hayabusa located behind the sun when it was seen from theearth. During conjunction, we could not communicate with the spacecraft due to interference by the sun. Therefore, we stopped the ion engines and waited until we were able to communicate again.
On July 29, 2005, the long-awaited moment came. Hayabusa finallysucceeded in taking an image of Itokawa. However, due to constraint on
the attitude of the spacecraft at that time, it was not by a camera for taking asteroids, but it was by Star Tracker that determined the attitude of
the spacecraft. The images of Itokawa were also taken in August, andthe accurate position of the spacecraft relative to Itokawa was acquired.
Hayabusa was ﬂying almost in the exact orbit which was planned.

Left�Itokawa taken by Star Tracker.
Using the positions of Itokawa seenfrom the spacecraft, the accurate
orbit of the spacecraft was determined.
Right�Photos when approaching Itokawa. From September 4, 2005
(1,000km distance) to September
10, 2005 (30km distance). The images are about one arc degree square.

●September 12, 2005 : Arrived at Itokawa

We stopped the ion engines on August 28, 2005, which had been running most of the time since the launch. The ion engines accomplishedthe role of the outward voyage. The total working hours of the ion engines were about 25,800 hours.
The distance to Itokawa was down to 3,500km at the end of August.
In September, the image of Itokawa, which had been only a point tillthen, was getting larger by the day. The shape was gradually becoming
clearer. It had an elongated shape as expected. The fact that it rotatedwith the period of about 12 hours was also confirmed.
Moreover, on September 12, 2005, Hayabusa hovered in the place ofabout 20km from the asteroid Itokawa. Finally it arrived. Everybody
was surprised with the image of Itokawa sent by Hayabusa at that time.
The surface was completely not what we expected. There were no craters on the surface. Instead, the surface was covered with a lot of rocks.

4■Mysterious world of Itokawa
During the first three weeks after reaching Itokawa, the spacecraft was ﬂying a distance
between 20km and 10km from Itokawa. Moreover, in October, it was brought close to about
7km from Itokawa, and it was brought closer to a place of about 4km at the end of October.
During this period, using the full capability of the observation equipment carried on the Hayabusa, the mission team acquired detailed data about Itokawa.
The most significant feature of Itokawa is that the surface is covered by various sizes of theplentiful rocks. Those rocks are called “boulders” The biggest boulder is the one called “Yoshinodai” named by the mission team, and its width is 50m and its height is 20m. In addition,
there is another boulder called “Pencil” which is sharply peaked.
Crater familiar to asteroids is not conspicuous. However, when investigated in detail, it
turned out that there are about 40 craters. When looking at the photo of Itokawa, we can seethat a part of the surface is relatively ﬂat. A feature of Itokawa is that two kinds of surfaces,
the rough surface and the smooth surface, are clearly divided. Moreover, the shape is elongated as expected, but it looks as if two objects are attached. At first glance, it has a shape
like a sea otter, doesn’t it? These facts serve as an important clue when solving the birth of
Itokawa.

East side

West side

Front

Back

Itokawa sea otter

The images of the whole asteroid Itokawa taken by Hayabusa. The image from the east side looks justlike a sea otter. The lump of the rock, which is projected on right-hand side in the west side image, is
Yoshinodai. Moreover, the rock, which is projected on the left of the center (around the neck of a sea
otter), is a Pencil. In the front image, there is a blackish color of boulder in the center of the head partof the sea otter. This is called Black Boulder, and it has become the origin of the longitude.

5

The biggest concern about the mission was where the spacecraft would touchdown (land).
Since the surface of Itokawa was unexpectedly rugged, the places where it can land werevery limited. One of the candidates was the place marked Point A. Here was a ﬂat place thatwas located exactly at the neck of the “sea otter” and the mission team calls it “Muses Sea”
(the official name approved by the International Astronomical Union is “MUSES-C Regio”).
Another candidate was the place marked Point B, which was at the hip of the “sea otter.” Themission team called it the “Woomera desert.” The
Woomera desert is the name of a desert in Australia
in which the capsule of the Hayabusa eventually willland (the official name has not been decided yet).
Nowhere else could we find a place to touchdown
other than these two sites. It might be lucky that wewere able to find places where it could land.
Various observations were continued during theprocess to make a decision of the potential site fortouchdown. The Hayabusa has a multi-spectral telescopic imager (AMICA), a near-infrared spectrometer (NIRS), X-ray ﬂuorescence spectrometer (XRS),
and a laser altimeter (LIDAR) as observation equipment. As we had already mentioned, AMICA has
taken a lot of images. NIRS and XRS are instruments, which investigate the spectra of infrared and
X-rays, to help us know the assortment and the elemental composition of the mineral of the surface of
Itokawa. LIDAR can investigate the precise gravityof Itokawa and the detailed feature of the surface bymeasuring an exact distance between Itokawa andHayabusa. After those investigations, preparation oftouchdown was completed.

Touchdown candidate site Point A

Touchdown candidate site Point B

The precise shape, the gravity ﬁeld of Itokawa, etc. were investigated by using observational data. This ﬁgure indicates the strengthof gravity by color.

The color of the surface of Itokawa was also observed in detail. This image, although the color
on the surface of Itokawa is magnified, showsthat whitish parts are mixed with blackish parts.

6■Touchdown (landing) rehearsal
November 2005 Hayabusa's big challenge started.

●1st rehearsal: November 4, 2005

Although preparation for the landing was completed, at first
the team ran through the descent test as rehearsal since it is dangerous to get down to the surface too suddenly. The purposes ofthis test were the calibration of the laser altimeter, confirmationof the target marker release, the image processing, and droppingof the exploration rover “MINERVA.” Although Hayabusa started
descending from near an altitude of 3.5km and went smoothly toabout an altitude of 700m, it stopped descending due to the instructions from the earth and left the asteroid since the orbital
error had become too large at that point. Although the rehearsal
didn’t go as well as planned, various things found out in relation
to the control of the spacecraft. Also, images of the “Woomera
desert” were taken. It was found that “Woomera desert” is unsuitable for touchdown since there are many boulders, which areseveral meters in size.
●Navigation guidance test: November 9, 2005

According to the test descent on November 4, the mission
team knew they needed further confirmation of the navigation
guidance functions for touchdown; therefore they tried to have
Hayabusa approach the asteroid. The purposes were to confirm
the functions of the image processing to recognize the asteroid,
the auxiliary navigation from the earth, and the short-distance laser range finder, and to execute the separation test of the target
marker. At this time, Hayabusa once approached to an altitude ofabout 70m and, after going away to about 3km, it approached toabout 500m again. Moreover, the close-up image of the “Muses
Sea” was also taken. Looking at the “Muses Sea” in detail, there
were rocks with size of several meters. However, when comparedwith other regions, there were many ﬂat parts. And when it approached to about 500m a second time, the separation test of thetarget marker was done. It was confirmed that the target marker
had been released normally, and the photographing with a ﬂash
lamp and function of position estimation by image processing
worked normally.

10m

The close-up image ofthe �Woomera desert�
taken at the time of the
1st rehearsal.

10m●2nd rehearsal: November 12, 2005

After the two descent operations above, another descent rehearsal was performed again. The purposes of this rehearsal
were to confirm the navigation guidance function for touchdown,
to calibrate the short-distance laser range finder, and to release
the exploration rover “MINERVA.” The minimum approach altitude at that time was about 55m. Regarding MINERVA, unfortunately it could not be put on the asteroid surface. In this descentrehearsal, more detailed images of the surface of Itokawa weretaken.

7

The close-up image ofthe �Muses Sea� taken at
the time of the navigation guidance test.

■Touchdown
Now, it is the climax of the mission !

●First touchdown: November 20, 2005

The Hayabusa started descending from a point of about 1km
from Itokawa at 9:00 p.m. on November 19. When it reached an
altitude of 54m at 5:28 a.m. on the 20th, the mission team commanded it to release the target marker. And then the target
marker was separated and descended down to the asteroid surface at the time when the spacecraft slowed down the velocity toalmost zero at around an altitude of 40m. This target marker had
a list of 880,000 people’s names. Thus, Hayabusa was able tosend the people's names to Itokawa successfully.
After that, however, something strange was going on with Hayabusa. Although it should have left from the asteroid immediately after touching on the surface of the asteroid in the schedule,
change in radio frequency sent by the spacecraft showed a completely different behavior. Therefore, the command was sent toHayabusa to leave the asteroid. After ward, when the data retrieved from Hayabusa was checked, it was found that Hayabusa
had landed on the surface of the asteroid. Unfortunately, it wasalso confirmed that the bullet, which was supposed to be fired inorder to collect the surface materials, was not discharged. However, Hayabusa became the first spacecraft ever to take off froma celestial body other than the earth and the moon.
●Second touchdown: November 26, 2005

Itokawa
Shows three kinds of models
Muses Sea

Hayabusa's orbit relative
to Itokawa

Shadow of Hayabusa itself and the target marker dropped to Itokawa.

Hayabusa started descend from an altitude of about 1km in response to command from the earth around 10:00 p.m. on November 25. It descended at almost the same place as the 1st touchdown. Since it was the same place, the target marker,
which had been dropped the last time, already existed. Therefore, the target marker was notreleased this time.
Hayabusa was approaching the asteroid smoothly. It touched on the surface around 7:07
a.m. on the 26th, the bullet was discharged immediately, and Hayabusa took off with the sample (everyone believed so at that time.). However, the situation would take a bad turn after
that.

Artistic images of touchdown of Hayabusa. At the 1st time (left), it had stayed on the
Itokawa�s surface for 30 minutes or more. At the 2nd time (right), touchdown was performed as planned. (Illustrated by Mr. Akihiro Ikeshita.)

8

■Hayabusa after the touchdown
After the 2nd touchdown, the fuel leaked after leaving the asteroid and decelerating the ascent velocity of Hayabusa. We were unable to control the spacecraft fully although various operations such as closing the valve of the fuel pipe were tried. Furthermore, the leaked fuelmight have frozen within the spacecraft. Even so, every possible means were tried to control
Hayabusa. Finally, the team even tried controlling its attitude by directly jetting xenon gas,
which was supposed to be used for the ion engines.
Unfortunately, the radio signal from Hayabusa was not received on and after December 9,2005. It was thought that an abnormal attitude had happened due to a gas discharge from thefuel leakage. Furthermore, according to the investigation of the data, which remained in thespacecraft, it was regretful to find that the bullet might have not been fired at the time of thesecond touchdown.
Afterwards, the radio signal from Hayabusa was caught again on January 23, 2006. And
then, as a result of careful operations, the orbit of spacecraft was determined successfully inMarch 2006. Since then, the communication with Hayabusa has been continued without interruption. Several operations were done, such as the test of the ion engines, the repair workof some broken batteries, etc. Then it succeeded in moving a sample collection container into
the capsule, and shutting and sealing the lid of the capsule on January 17, 2007. The preparation for the return to the earth had finished. From February 2007, operation of the ion engines was checked again. And, from April 25, 2007, the spacecraft shifted to full cruise mode
for returning to the earth.
As of May 2007, the return to the earth of Hayabusa
will be scheduled for June 2010. In June 2010, the capsule will be separated when Hayabusa approaches at the
midpoint of its path between the earth and the moon.
The capsule will endure high temperatures due to theinteraction with the atmosphere, will open a parachuteto slow down, and will land in the Woomera desert inAustralia.

■Things Hayabusa left unﬁnished
There are two big things that Hayabusa has not done.
One is that the collection of the surface material of theasteroid was not carried out as the prearranged procedure. Since Hayabusa bounded on the surface of Itokawa at the time of the 1st touchdown, we expect that thesurface material must have entered into the spacecraftat that time.
The other thing is that we could not send the exploration rover “MINERVA” on the surface of Itokawa. Afterbeing separated from the spacecraft, MINERVA succeeded in photographing a part of the solar paddle ofHayabusa. MINERVA worked normally, so no landingon the surface was really too bad. We expect that we cantry again someday.

9

In June 2010, the capsule willseparate from Hayabusa and descend to the desert in Australia at
midnight. (Plan) (Illustrated by
Mr. Akihiro Ikeshita.)

A photo of the backside of the solar
paddle shot by MINERVA, which
was separated from Hayabusa.

■To the futureWith the exploration of Hayabusa, a featureof the tiny asteroid like Itokawa, whose seize
is about 500 m, was made known for the firsttime ever. Important findings, in particular,
are that the density of Itokawa is about 1.9g/
cm3 and that the surface of Itokawa has thesimilar material as ordinary chondrite whichfalls in great number to the earth. From theseresults, it is estimated that the percentage ofvoid inside Itokawa is no less than 40%. Thus,
Itokawa more likely has a structure like theaggregate of “rubble.” We can consider theformation scenario of Itokawa as follows: Asteroids once collided with each other aroundthe inner region of the main asteroid belt.
They destroyed with each other. The fragments pulled together by gravity to form
lumps. Then the present Itokawa was formed
by a collision of two of such lumps. Itokawa
may tell the histor y of a collision of suchsmall objects.

The scenario of the birth of the asteroid Itokawa: the fragments made by collision got together into two objects and they collided to
combine into one.

Various discoveries about Itokawa were amazing. However, there are still a large numberof asteroids in existence. There may be asteroids that are completely different from Itokawa.
Of course, since it is impossible to explore all the asteroids, it is interesting from the aspectof science to, at first, study another type of asteroid different from Itokawa. Now, the “HAYABUSA-2,” the successor of Hayabusa, is under consideration. The destination of “HAYABUSA-2” is a C-type asteroid that contains more organic matters while Itokawa is S-type withmainly rocky materials. We are looking forward to seeing what kind of world spreads out
there.

Artistic image of the �HAYABUSA-2� which aims at C-type asteroid. (Illustrated by Mr. Akihiro Ikeshita.)

10

Yoshinodai［B1］
Komaba［C6］Arcoona［C2］

The Black Boulder［B10］

Asteroid 25143 Itokawa
M-Ⅴ
［B5］

SUBARU［B6］

Yoshinobu［C1］

Pencil［B4］

11
11

Yatsugatake［L5］ Noshiro［L1］ Shirakami［L4］
Kamisunagawa［C9］Mountainview［B7］

MUSES-C［M］

Usuda［B8］

Hoyoshi［B9］ Kakuda［B2］

Uchinoura［U,C5］
LINEAR［C4］

Viewed by HAYABUSA

Oosumi［C3］
Kamoi
［C8］
Kakuda［B2］

Hoyoshi［B9］

Sagamihara［SA］

Sanriku［L3］

The North
Vertex［L2］Kokubunji［B3］Fuchinobe［C7］

Reprint from ISAS News, June 2007, No.315

1212Return of the Falcon
祈り

The story of "Hayabusa", a spacecraft to explore an asteroid
小惑星探査機 はやぶさ の物語

V-0704317

NTSC

Notice：Using this DVD for rental service or putting it into a state where it can be broadcast through a network, etc. without the authorization of the rightholder is forbidden by law. Except for personal use, it is prohibited to copy this DVD to any media without the permission of the right holder.

Return of the Falcon
祈り

The story of "Hayabusa", a spacecraft to explore an asteroid

小惑星探査機 はやぶさ の物語

Second Edition : November 20, 2007
Produced by Institute of Space and Astronautical Science (ISAS),
Japan Aerospace Exploration Agency (JAXA)
3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan
Booklet prepared by Makoto Yoshikawa and Osamu Mori

http://www.hayabusa.isas.jaxa.jp/
http://hayabusa.sci.isas.jaxa.jp/
http://www.isas.jaxa.jp/
http://www.jspec.jaxa.jp/

Contact info for inquiries : Makoto Yoshikawa (e-mail : makoto.yoshikawa@jaxa.jp／Fax : +81-42-759-8675)

13

About the music used in the “Return of the Falcon”
Most of the music played in the DVD was released as a suite consisting of 11 music selections, “Lullabyof Muses” (Lyra Records/LRHL1003/LRHL1007) for praying success of the missions in autumn of
2002, when Hayabusa was still called MUSES-C of its code name.
On the night of November 18, 2001 when the brilliant Leonid meteor showered, I asked a jazz pianist,
Ms. Emiko Kai, to compose the piece of music “Jupiter in rains” which depicted the night of the meteor
shower, and to play live as BGM of the Internet relay while the meteor shower flowed. At that time, I
was earnestly tackling the collaboration with a musician in order to find out the possibility for a new
type of astronomical education. One day, after Leonid meteor fever went down, Dr. Hajime Yano of the
MUSES-C mission team asked me “Could you also make music for an asteroid explorer?” and since I
said, “Why don’t we make a suite where people can enjoy the missions complete process from launch to
the return to the earth through music?” everything started.
I asked again Ms. Emiko Kai for a composition, an arrangement, and selection of a musician. And then I
had Ms. Kai to visit ISAS, watch MUSES-C under assembly, and also take a lecture by Dr. Yano tounderstand the missions. On that occasion, Ms. Kai completed the suite which portrays MUSES-C as aboy who was going to leave for an adventure and expresses thoughts from not only the mission teambut from all the people who wish success as a goddess. I also asked a vocalist, Ms. Yasuko Nakatani,
who would express a goddess who warmly watched the boy by singing, for meeting with MUSES-C at
ISAS to understand the people’ s thoughts. During the recording, I had Dr. Yano come to the studio,
and asked him for the final check of the lyrics.
There are scenes where music is used in this DVD that is different from the music album “Lullaby ofMuses.” This is the result of making the music rhythm fit the motion of Hayabusa during the process ofadding music to CG, which was made based on the results of actual missions. Moreover, we adopted
two music selections from a music album “Stairway to the stars” (Lyra Records/LRJZ1005) made forthe total eclipse of the sun and the night of Leonid meteor since we could not pick up suitable musicfrom only the suite because the video of the touchdown and various experiments prior to thetouchdown were too long. In the two albums, leading Japanese jazz musicians did the wonderfulperformance. Moreover, Ms. Xiumin who is a leading player of Erhu, a Chinese musical instrument,
expresses well the jet-black darkness of the universe in which Hayabusa continues to travel.
This music is a piece of scientific work for which the scientists, the players, and the astronomical
educators cooperated in this way. Now, this wonderful video is added to the music. As for detailed
descriptions of each music piece, I leave it to the original album, so in this DVD, please enjoy abeautiful sound and video while reading a science description of this booklet.
Music editor

Masami Okyudo
Student Center for Independent Research in the Sciences
Wakayama University

14

Return of the Falcon
The story of "Hayabusa",
a spacecraft to explore an asteroid
祈 り
小惑星探査機 はやぶさ の物語

This video was made to help you relax while watching thestory of exploration of the asteroid Itokawa by the spacecraft
Hayabusa with scientific accuracy. The melody of beautiful
jazz, which is played through most of the video, was composed by Ms. Emiko Kai as a promotional song when Hayabusa was still called MUSES-C. The music represents theimage of a Muse (goddess), who is a symbol of the thoughtsof people who operate Hayabusa and all the people who cheer
on Hayabusa, gently watching the challenge of a boy Hayabusa. Please prepare your favorite refreshment, a glass ofwine, juice, or a cup of coffee, and enjoy this video.

+PUVKVWVGQH5RCEGCPF#UVTQPCWVKECN5EKGPEG

Produced by Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)