Author Topic: ESA's Rosetta and Philae Mission at Comet 67P - Post Landing UPDATES  (Read 219575 times)

Offline woods170

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Initial touchdown was almost in exact center of landing elipse.

Offline woods170

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Philae departure sequence showed it was rotating on it's way down. This was allowed for.

Offline woods170

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White dot in red circle is Philae approx 65 minutes before landing.

Offline woods170

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Improved departure image, courtesy of Rosetta team.
« Last Edit: 11/13/2014 01:21 PM by woods170 »

Offline woods170

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Initial landing point

Offline woods170

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View of entire area, including where lander finally ended up.
Exact location not yet known. Two candidates found, but need better imaging to avoid over-exposure. Search resumes on next comm run.
« Last Edit: 11/13/2014 01:22 PM by woods170 »

Offline woods170

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Wrapping up. Personal thanks being handed to spacecraft manager.

Offline woods170

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Mission not over yet. Much more to come from the orbiter for weeks, months and possibly years to come.

Offline woods170

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"It has been a magnificent two days".

Lander doing fine. Has pulled off huge achievement.

"Wonderfull mission"

"Rosetta will continue another 20 months at the comet".
« Last Edit: 11/13/2014 01:22 PM by woods170 »

Offline woods170

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Questions coming up.

Offline mcgyver

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Offline woods170

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Question: how come a soft surface caused Philae to bounce so much?

Answer: surface composition not as we expected. Soft, but not of high porosity due to accumulation of dust. It's soft yet quite firm.

Offline woods170

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Lander was designed with legs to perform small hops by extending the landing gear.

Not sure to be done now with only two feet on the ground. Still being determined whether or not a hop should be tried to get away from the pit and wall where Philae is stuck now.

Offline woods170

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Initial touchdown triggered 'ground sequence' for instruments despite the fact Philae had lifted off again. Instrument kept with 'ground sequence', even when not on surface.

Offline woods170

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Lander was designed with legs to perform small hops by extending the landing gear.
Is the landing gear not just passive?!?

No, this was quite clearly indicated in the presser. It's active. By extending it small hops can be made. Plan was NOT to do this, but feature is still there. Now under examination to assess whether or not this feature can get Philae out of it's current 'tight spot'.

Offline woods170

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Jean Pierre:

Very low gravity. Every time you move something, there will be counter reaction. This might be used to improve position of Philae to get more sunlight on the solar panels. Still under discussion.
« Last Edit: 11/13/2014 01:10 PM by woods170 »

Offline woods170

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Question about harpoons.

Harpoons did not fire.
Harpoon sequence was triggered upon initial touchdown, but harpoons did not actually fire. But spools WERE activated, despite the fact that the harpoons had not fired.

Failure of harpoon firing still under investigation.
« Last Edit: 11/13/2014 01:14 PM by woods170 »

Offline JimO

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Did anyone mention the power redline at the usage and charging rates now in effect?

What's the 'drop dead' time-to-go?

Offline woods170

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When battery goes low, Philae goes into hibernation.

If and when sunlight situation improves this could theoretically wake up Philae again. But not a scenario that is likely right now.

Offline woods170

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Did anyone mention the power redline at the usage and charging rates now in effect?

What's the 'drop dead' time-to-go?

Yes, before the presser there was a CNES presser. Drop dead was 50 to 55 hours away this morning.

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