Hayabusa2 to Ryugu, sample & return mission

approaches target asteroid

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Hayabusa2 to Ryugu, sample & return mission

#1  Postby newolder » Jun 07, 2018 12:30 pm

After the partial success of the first Hayabusa mission, the Space Agency of Japan's second sample and return mission is rapidly (about 2.5 metres per second !) approaching Ryugu - its target asteroid. It's currently about 2060 km away.

The approach (and mission links) can be followed here.

ETA Wiki & JAXA (English) pages.
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Re: Hayabusa2 to Ryugu, sample & return mission

#2  Postby newolder » Jun 11, 2018 2:01 pm

Still looks a bit blobby from 1500 km but getting ever closer...
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image from the probe via JAXA
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Re: Hayabusa2 to Ryugu, sample & return mission

#3  Postby The_Piper » Jun 11, 2018 3:11 pm

:eager:
OMG it looks like Asteroids, the video game! :lol:
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Re: Hayabusa2 to Ryugu, sample & return mission

#4  Postby newolder » Jun 11, 2018 3:17 pm

via wiki:
...
The Small Carry-on Impactor (SCI) is a small drop-off explosively formed penetrator, consisting of a 2.5 kilogram (5.5 lb) copper projectile and a 4.5 kilogram (10 lb) shaped charge.
...

Unless it's like a glass bauble, there shouldn't be too much resemblance to the video game, but what do I know? :dunno:
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Re: Hayabusa2 to Ryugu, sample & return mission

#5  Postby The_Piper » Jun 11, 2018 3:31 pm

newolder wrote:via wiki:
...
The Small Carry-on Impactor (SCI) is a small drop-off explosively formed penetrator, consisting of a 2.5 kilogram (5.5 lb) copper projectile and a 4.5 kilogram (10 lb) shaped charge.
...

Unless it's like a glass bauble, there shouldn't be too much resemblance to the video game, but what do I know? :dunno:

I mean the picture of the asteroid that you posted above, not the mission.
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Re: Hayabusa2 to Ryugu, sample & return mission

#6  Postby newolder » Jun 11, 2018 3:36 pm

Yes, I got that - I'm just saying that any upcoming damage will be short of that modelled in the game - unless something's seriously amiss.
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Re: Hayabusa2 to Ryugu, sample & return mission

#7  Postby Cito di Pense » Jun 11, 2018 3:42 pm

The_Piper wrote:OMG it looks like Asteroids, the video game!


That wasn't an ordinary video game you were playing. You were being used by a higher intelligence.
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Translation by Elbert Hubbard: Do not take life too seriously. You're not going to get out of it alive.
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Re: Hayabusa2 to Ryugu, sample & return mission

#8  Postby The_Piper » Jun 11, 2018 3:56 pm

:lol: :lol: It was a remote console and I was blowing up innocent Avatar creatures home worlds?

newolder wrote:Yes, I got that - I'm just saying that any upcoming damage will be short of that modelled in the game - unless something's seriously amiss.
Ok, well I hope it won't be so destructive. They may find something so interesting in the sample return that they want to get more.
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Re: Hayabusa2 to Ryugu, sample & return mission

#9  Postby newolder » Jun 11, 2018 4:23 pm

If they want to get more, there's plenty more "fish in the sea" as this discovery compilation from 1970 to 2015 shows well:
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Re: Hayabusa2 to Ryugu, sample & return mission

#10  Postby The_Piper » Jun 11, 2018 5:20 pm

Kewl animation. Just for the record, I was aware that there are countless other asteroids, but I meant something more interesting than just "expected interesting". Something that wouldn't necessarily be on just any random asteroid. Taking the time and effort to land on a different asteroid hoping to find a sample of that same interesting something, or to learn more about that same something interesting, may not be a sound investment of time and resources.
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Re: Hayabusa2 to Ryugu, sample & return mission

#11  Postby newolder » Jun 11, 2018 5:46 pm

The population of asteroids is large and with few exceptions all had a similar origin in the Solar system's proto-disk. There's a predominantly ice/rock differential out there but I don't yet know the composition of Ryugu. There's a slim to vanishing chance that Ryugu is a single elemental block of gold, silver, platinum or other from an earlier neutron star merger or supernova blast, covered in dust. Who knows until the probe gets there and does its stuff? :think:

If we are running a sweep, I'll have a euro that any successful return will comprise dusty rock with a hint of tardigrades/aliens. :lol:
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Re: Hayabusa2 to Ryugu, sample & return mission

#12  Postby The_Piper » Jun 11, 2018 6:10 pm

newolder wrote:The population of asteroids is large and with few exceptions all had a similar origin in the Solar system's proto-disk. There's a predominantly ice/rock differential out there but I don't yet know the composition of Ryugu. There's a slim to vanishing chance that Ryugu is a single elemental block of gold, silver, platinum or other from an earlier neutron star merger or supernova blast, covered in dust. Who knows until the probe gets there and does its stuff? :think:

If we are running a sweep, I'll have a euro that any successful return will comprise dusty rock with a hint of tardigrades/aliens. :lol:

What's a sweep, a sweepstakes? :shifty:
The asteroids virtually all share a common origin, and there is what one might expect to be a one in a million chance of hitting on something truly unique, but they've been separate from each other for billions of years.
So maybe it's only a one in a thousand chance of being interestingly unique, by this point. I wasn't even thinking of precious metals, more like "precious" chemistry, or some other random cool thing. Mark my bet down for no tardigrades though. :lol:
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Re: Hayabusa2 to Ryugu, sample & return mission

#13  Postby newolder » Jun 16, 2018 12:56 pm

(Yes, The_Piper a sweep is an abbreviation for sweepstake.)
From about 700km Ryugu is seen to spin...
Image
...
The distance to Ryugu when the images were captured was between about 700 - 650 km. In these photographs, Ryugu is approximately 12 - 13 pixels in diameter. The animation in Figure 1 shows the photographs after image processing has been performed to smooth between the pixels so that the asteroid’s surface looks smooth.
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Re: Hayabusa2 to Ryugu, sample & return mission

#14  Postby newolder » Jun 20, 2018 4:00 pm

Closer yet...
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Re: Hayabusa2 to Ryugu, sample & return mission

#15  Postby newolder » Jun 25, 2018 7:02 pm

40 km and closing at about 110 mm/s.
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Notes in English
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Re: Hayabusa2 to Ryugu, sample & return mission

#16  Postby theropod » Jun 25, 2018 10:07 pm

We live in amazing times. I hope we survive them.

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Re: Hayabusa2 to Ryugu, sample & return mission

#17  Postby felltoearth » Jun 25, 2018 10:14 pm

Looks like a D10
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Re: Hayabusa2 to Ryugu, sample & return mission

#18  Postby newolder » Jun 27, 2018 9:13 am

Hayabusa2 Rendezvous with Ryugu
June 27, 2018 (JST)
National Research and Development Agency
Japan Aerospace Exploration Agency (JAXA)
JAXA confirmed Hayabusa2, JAXA's asteroid explorer rendezvoused with Ryugu, the target asteroid.

On June 27, 2018, JAXA operated Hayabusa2 chemical propulsion thrusters for the spacecraft's orbit control.*
The confirmation of the Hayabusa2 rendezvous made at 9:35 a.m. (Japan Standard Time, JST) is based on the following data analyses;
・The thruster operation of Hayabusa2 occurred nominally
・The distance between Hayabusa2 and Ryugu is approximately 20 kilometers
・Hayabusa2 is able to maintain a constant distance to asteroid Ryugu
・The status of Hayabusa2 is normal
...

Image
More @ JAXA source
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Re: Hayabusa2 to Ryugu, sample & return mission

#19  Postby Cito di Pense » Jun 27, 2018 11:54 am

Look! It has a north polar ice cap! Otherwise, it looks like a gigantic Tater Tot. In the vacuum of space, all the golden tater color got sucked away.
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Re: Hayabusa2 to Ryugu, sample & return mission

#20  Postby newolder » Jun 27, 2018 12:41 pm

Parking orbit achieved, cap'n. Steady as it goes. Orienteering for landing site. No hostiles in proximity, as yet...
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