Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Sep 20 2018, 11:13 AM
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#1
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Hayabusa 2 has started its descent towards Ryugu for Minerva deployment. Real time navigation images are posted here. One new image every half hour or so.
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Sep 22 2018, 03:30 PM
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#2
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
Outstanding!
I have one thing about which I am curious. The final of the three images states it was taken while its rover was in mid-hop. I'm wondering why any hopping activity was occurring without any commands sent from Earth -- I didn't see any indication of pre-programmed hopping set up in the deployment and landing timelines that JAXA posted. And from the other statements made, both pre- and post-landing, I can't see any indication that hopping actions were commanded during this time. I *did* see something that indicated that the rovers were expected to "bounce" and take a good 15 minutes to settle down onto the surface in a stable, non-moving attitude. Could the caption which indicates the rover was hopping really indicate that it was in a bounce and not in a deliberate or commanded hop? The difference would be like stating that, say, Opportunity was "roving" as it bounced to a stop within Eagle Crater... -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Sep 22 2018, 05:25 PM
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#3
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
I'm wondering why any hopping activity was occurring without any commands sent from Earth You would absolutely pre-program a long sequence of activities for them, including hops, imaging, temperature measurements and comm passes. Our situational awareness for them is poor. We don't know what way up they will land, if they'll get stuck under a boulder etc etc Having an autonomous sequence of imaging and hopping would be the only rational way to execute a mission like this. |
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