Philae lander ceased communication with both the Rosetta orbiter and Eksploracyjno research activities due to lack of a sufficient level of energy.
November 15, 2014 Philae, the Rosetta lander completed, pending renewal power sources in solar energy, its primary mission science after nearly 57 hours on the surface of comet 67P / Churyumov-Gerasimenko. After periodic problems with visibility and communication with the lander from 9:58 GMT / 10:58 CET on Friday, Rosetta Philae regained contact with the chair. 22:19 GMT / 23: 19 CET at night. At first the signal was intermittent, but quickly stabilized and remained very good for hours. 0:36 GMT / 1:36 CET today, Saturday night.
At this time, the lander was able to pass all of their operational data as well as data collected by scientific instruments, including Rolis, COSAC, Ptolemy, SD2 and consert. Also completed measurements, initially planned for a later stage of the mission, as part of the basic experiments on the surface of the block.
Read also: Philae twice bounced from the comet 67P / Churyumov-Gerasimenko
In addition, the lander body was raised by about 4 cm and rotated by 35 ° in an attempt to gain access to larger amounts of solar energy. Soon after, the power of Philae, fell below the minimum because it was quickly exhausted on operations conducted.
From now on, no contact. It is however possible if strong enough sunlight falls on the solar panels to generate enough power to “wake up” Philae.
The ESA still has hope that at a later stage of the mission, perhaps, when the comet together the lander will be closer to the Sun, Philae will have enough sunlight to charge the solar batteries and “wake up” to re-establish communication and follow-up mission and research program.
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