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Mission: Hayabusa 2
Quetzalcoatl
post May 13 2020, 08:50 AM
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Bonjour

News of Hayabusa2s return trip :

http://www.hayabusa2.jaxa.jp/en/topics/20200513_2nd/
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Roman Tkachenko
post May 13 2020, 11:51 AM
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HIT THE ASTEROID!
Hayabusa2 touchdown on asteroid Ryugu


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Tom Tamlyn
post May 18 2020, 03:10 AM
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So where's the swear jar these days? laugh.gif
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Marcin600
post Jun 23 2020, 06:03 PM
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Minerva-II2 orbiting around Ryugu - unpublished (?) pictures/videos from the monitoring of Minerva-II2 movement can be seen in the presentation (in Japanese) by Mr. Yuya Mitsuhashi, a member of the Hayabusa2 project, on June 20, at Hamagin Children's Space Science Museum (1st Hamagin Kids Science Talk Event) -

- posted on Youtube: from 1:33:25 to 1:38:50

These pictures may not be spectacular, but they are scientifically important (study of the gravitational field around Ryugu)
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Marcin600
post Jun 27 2020, 12:20 AM
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An interesting topic has appeared on the JAXA’s Hayabusa2 website: "Ryugu's porous boulders covered rough surface, everywhere!" , presenting a new paper that has been published in the electronic version of Icarus: Shimaki et al., 2020 „Thermophysical properties of the surface of asteroid 162173 Ryugu: Infrared observations and thermal inertia mapping”

Two quotes:
„...As a result, it is found that the thermal inertia of the surface of Ryugu is ubiquitously small and porous boulders are distributed all over the surface of Ryugu. Additionally, the surface of Ryugu is as rough as the surface of Hawaii's a'a lava (degrees of roughness for Ryugu is several meter squares, whereas that for a'a lava is several tens centimeter squares, respectively)...”

„...The global surface roughness of Ryugu, covered by numerous boulders, was estimated to be 0.41 0.08, corresponding to the RMS surface slope (average slope of a rough surface) of 47 5. The RMS surface slope of Ryugu is comparable to that of Hawaii's a'a lava. Note that the RMS slope of Ryugu is for several meter squares, but that of a'a lava for several tens centimeter squares, respectively. These similarities are only in their morphologies, so they do not represent similarities in the compositions and formation processes (Ryugu's boulder is expected to be carbonaceous chondrites rich in organics, but a'a lava is a basaltic igneous rock). However, these results suggest that large-scale roughness can be maintained on the surface of Ryugu because of the tiny gravity and no-weathering environment...”
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