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Minerva lost in space, Hayabusa still to land



 
 
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  #1  
Old November 15th 05, 11:34 PM
snidely
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Default Minerva lost in space, Hayabusa still to land

Hayabusa is still set to attempt landings on asteroid Itokawa on Nov.
19 and Nov. 25, according to JAXA, even though the sub-probe Minerva
failed to make its landing.

The AP report is at
http://www.space.com/missionlaunches/ap_051113_probe_lost.html or at
http://news.yahoo.com/s/ap/20051114/ap_on_sc/japan_asteroid

/dps

  #2  
Old November 15th 05, 11:42 PM
snidely
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Default Minerva lost in space, Hayabusa still to land

Followup report at
http://www.space.com/missionlaunches/051115_hayabusa_update.html

and JimO's report is at http://www.msnbc.msn.com/id/10013920/

/dps

  #3  
Old November 16th 05, 07:19 AM
Jim Kingdon
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Default Minerva lost in space, Hayabusa still to land

http://www.space.com/missionlaunches...sa_update.html
http://www.msnbc.msn.com/id/10013920/


Hmm, that's disappointing.

It wasn't clear to me whether the plan was faulty ("hope" that
Hayabusa is descending at the time that it releases Minerva), or
whether there was a more subtle malfunction.

Anyway, I'm still hoping that Hayabusa manages to complete its sample
return.

  #4  
Old November 17th 05, 12:36 AM posted to sci.space.moderated
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Default Minerva lost in space, Hayabusa still to land

Jim Kingdon wrote:
Anyway, I'm still hoping that Hayabusa manages to complete its sample
return.


Well, it's got the motors and the range finders, just a few days to
find out about landing 1....

/dps

  #5  
Old November 21st 05, 10:12 PM posted to sci.space.moderated
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Default Minerva lost in space, Hayabusa still to land

Sapce.com is reporting that Hayabusa may or may not have made contact.

"According to earlier reports that quoted JAXA officials, Hayabusa
descended to just 56 feet (17 meters) before operators at Japan's
Deep Space Control Room of ISAS/JAXA lost contact with the probe for
several hours. Hayabusa was thought to have eased back from the
asteroid by several miles, with mission controllers apparently eyeing
another landing attempt late next week."

http://www.space.com/missionlaunches/051120_hayabusa_problem.html

/dps

  #6  
Old November 21st 05, 10:15 PM posted to sci.space.moderated
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Default Minerva lost in space, Hayabusa still to land

Other reports are more definite...no landing.

"After analyzing the data returned by the spacecraft, however, the team
found that Hayabusa continued its slow descent following the target
marker until it got to within about 10 meters (32.8 feet) of the big
rock, and then it autonomously went into safe mode, according to a
report issued by the Hayabusa Joint Science Team members that the
mission's Project Manager, Jun'ichiro Kawaguchi, sent to The
Planetary Society yesterday afternoon. Instead of landing, the
spacecraft apparently cruised above the surface for awhile, until
mission control signaled to the spacecraft to abort the landing
altogether."

http://planetary.org/news/2005/1121_Hayabusa_Does_Not_Land_on_Asteroid_in.html

/dps

  #7  
Old November 23rd 05, 08:18 PM posted to sci.space.moderated
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Default seems Hayabusa DID land...

snidely wrote:
Other reports are more definite...no landing.

"After analyzing the data returned by the spacecraft, however, the team
found that Hayabusa continued its slow descent following the target
marker until it got to within about 10 meters (32.8 feet) of the big
rock, and then it autonomously went into safe mode,


"However, on Wednesday JAXA said that data sent from Hayabusa confirmed
that it had landed on the asteroid on Sunday for about half an hour.
However, the probe failed to collect material, JAXA said."

See AP reports like
http://news.yahoo.com/s/ap/20051123/ap_on_sc/japan_asteroid_probe

/dps

  #8  
Old November 29th 05, 09:04 PM posted to sci.space.moderated
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Default seems Hayabusa DID land...

Lots of celebrations of the success of a second landing, but Hayabusa
still having troubles.

The AP report says"The Hayabusa probe appeared to have touched down
Saturday, just long enough to collect powder from the asteroid's
surface and lift off again to return to Earth.

But it soon began shaking due to a gas leak from a thruster, and that
continued through Tuesday, the Japan Aerospace Exploration Agency, or
JAXA, said on its Web site."

http://news.yahoo.com/s/ap/20051129/ap_on_re_as/japan_asteroid

  #9  
Old November 30th 05, 12:04 AM posted to sci.space.moderated
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Default seems Hayabusa DID land...

But it soon began shaking due to a gas leak from a thruster, and that
continued through Tuesday, the Japan Aerospace Exploration Agency, or
JAXA, said on its Web site."


Hmm. Sky&Telescope makes it sound like it is not such a big deal
(maybe):

Today's sampling operation went smoothly, say officials of the Japan
Aerospace Exploration Agency, though after leaving the surface a
thruster problem arose that forced ground controllers to place the
craft in a "safe" (standby) mode. "Actually we were seeing the sign of
this problem during the descent phase," notes project manager
Junichiro Kawaguchi. "But at that time we switched to the backup
system and continued the descent."

According to Kawaguchi, the problem caused some loss of propellant,
which was already in short supply, and probably involves one or two
malfunctioning thrusters. Operations continue normally for now, he
said, though the propellant loss has "definitely raised the bar" for
getting Hayabusa back to Earth.

http://skyandtelescope.com/news/article_1630_1.asp

  #10  
Old December 1st 05, 12:29 AM posted to sci.space.moderated
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Default seems Hayabusa DID land...

Well, there's another article he
http://spaceflightnow.com/news/n0511/29hayabusa/ which mentions the
thruster problem, but still seem to quite tell us what is going on.
No doubt partly a question of translation from the Japanese...
There's also http://www.hayabusa.isas.jaxa.jp/e/index.html which has
nice images of the target which Hayabusa dropped.

 




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