[SCI] April 5, 07:00 (JST): operation has changed from the night shift to the day shift. The Small Carry-on Impactor (SCI) will be activated during this shift. At 08:09 JST, the spacecraft had descended to about 1.5 km.
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[SCI] April 5 at 11:32 JST: The separation of DCAM3 from the spacecraft has been confirmed. The spacecraft is now performing the evacuation ΔV (acceleration) as planned.
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[SCI] April 5 at 11:43 JST. It is now 10 minutes until the operation of the SCI (impact device) can be confirmed.
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[SCI] The SCI operation is at 11:53am JST (ground reception time). We will then watch the situation of the spacecraft for a few minutes. Previously we tweeted that we could confirm the operation of the SCI, but confirming the operation itself is not yet possible.
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[SCI] April 5 at 11:56 JST. The SCI operation time has passed and we have confirmed there is no problem with the spacecraft during the evacuation operation.
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[SCI] April 5 at 12:45 JST. The operation is steadily progressing. The control room was crowded with people, but now about 20 people are working here.
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[SCI] April 5 at 13:45 JST: Gate 5 was confirmed. The spacecraft state is normal and it was confirmed that the evacuation operation, the separation of the SCI and DCAM3 went as planned. The SCI separation and evacuation sequence were a success.
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[SCI] April 5 at 15:12 JST. The return to the home position at a 20km altitude was judged as “GO”. Currently, the spacecraft status is normal.
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[SCI] This is an image taken with the wide angle optical navigation camera (ONC-W1) immediately after (few seconds) the separation of the SCI. The retroreflective sheet on the SCI glows white due the image being shot with a flash. This showed the separation was on schedule.pic.twitter.com/8FPWY470nI
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[SCI] The deployable camera, DCAM3, successfully photographed the ejector from when the SCI collided with Ryugu’s surface. This is the world’s first collision experiment with an asteroid! In the future, we will examine the crater formed and how the ejector dispersed.pic.twitter.com/eLm6ztM4VX
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[SCI] April 5, 24:00 JST: the final shift 5 for the SCI separation operation was completed with a briefing for the eight people who remained in the control room until the end. With a modest applause, we considered this the end of the operation. Thank you for all your support!
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In a few minutes Hayabusa-2 will fire a 2.5 kilo slug at the asteroid Ryugu to dig up material under the surface. Follow
@haya2e_jaxa to keep up, and read my blog post for more info: https://www.syfy.com/syfywire/amazing-video-hayabusa-2-shot-a-bullet-at-an-asteroid-and-collected-the-shrapnel …https://twitter.com/haya2e_jaxa/status/1113995780610596865 … -
The slug is copper, and should impact Ryugu at a speed of *2 kilometers per second*. It’s not known how big a crater that will create but probably several meters across.
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