Philae Comet Lander Falls Silent as Batteries Run Out

http://m.space.com/27782-philae-comet-lander-silent-no-batteries.html?adbid=10152454367751466&adbpl=fb&adbpr=17610706465&cmpid=514639_20141116_35689467

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4 Comments

  1. Tomi Engdahl says:

    Comet 67P found to be COMPLETELY UNATTRACTIVE
    Philae lander to come alive soon, says ESA, but has no magnetic field to contend with
    http://www.theregister.co.uk/2015/04/16/comet_67p_found_to_be_completely_unattractive/

    The Philae Lander should soon see enough sun to resume operations on Comet 67P/Churyumov-Gerasimenkoduring April or May, the European Space Agency’s (ESA’s) lander manager Stephan Ulamec told the European Geosciences Union General Assembly earlier this week.

    Philae hitched a ride to 67P aboard the Rosetta probe and descended to the comet last year, but landed in a crack where its solar panels could not see the Sun. Once its batteries reached a certain level it therefore hibernated. The ESA tried to wake the lander last month, without success, but Ulamec feels 67P is now receiving enough sunlight that the craft’s innards should warm beyond -45C, the point at which it starts to do things other than self-preservation. With a little extra sunlight, it’s expected the lander may even gather enough energy to fire up its radios and start doing science.

    If that happens, one of the things it won’t need to look for is a magnetic core, because the lander’s bounces across the comet’s surface have shown it doesn’t have one.

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  2. Tomi Engdahl says:

    Philae’s Alive!!
    http://www.eetimes.com/author.asp?section_id=36&doc_id=1326886&

    European Space Agency’s Rosetta mission is back on as Philae lander reawakens on its comet after withstanding months spent in seriously sub-zero temperatures.

    Although Rosetta has performed almost flawlessly, Philae’s unforeseen landing position rendered it unable to recharge its batteries from its solar panels as they were not getting enough sunlight, and after completing some of its planned experiments, it shut itself down. ESA were hoping that when 67P drew nearer to the sun, Philae would receive enough sunlight and warmth to come back to life.

    And it’s happened! Signals have been received from Philae.

    Initially there was a mere 85 seconds of data from Philae received by Rosetta on 13 June, followed by another short burst on 14 June. The data thus far received indicates that Philae is receiving solar power for around 135 minutes in each 12-hour comet “day” generating form 13 to 24 Watts. Philae needs a minimum of 19W to “Talk” but it is hoped that as the comet nears perihelion (nearest approach to the sun) power levels — and hence the amount of communication — will increase

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  3. Tomi Engdahl says:

    Long-Lost Comet Lander Philae Found
    https://science.slashdot.org/story/16/09/05/1753235/long-lost-comet-lander-philae-found

    With only a month before its mission ends, the European Space Agency’s Rosetta mission swooped low over Comet 67P/Churyumov–Gerasimenko to see the stranded Philae lander jammed in a crack. After months of searching for the lander, which made its dramatic touchdown on Nov. 14, 2014, mission scientists had a good idea as to the region the robot was in, but this is the first photographic proof of the lander, on its side, stuck in the craggy location called Abydos.

    Philae Found! Rosetta Spies Dead Comet Lander
    http://www.seeker.com/philae-found-rosetta-spies-dead-comet-lander-1997732750.html

    With only a month before its mission ends, the European Rosetta mission swooped low over Comet 67P/Churyumov–Gerasimenko to see the stranded Philae lander jammed in a crack.

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