Зонд Rosetta

Прощание с Philae

Космический аппарат, который 12 ноября 2014 года, мягко коснулся поверхности кометы 67P/Чурюмова-Герасименко уже более полугода не подает признаков жизни. Philae Lander… // zelenyikot.livejournal.com

Комету Чурюмова—Герасименко засняли в лучах Солнца

Европейское Космическое Агентство опубликовало новую фотографию кометы Чурюмова—Герасименко, полученную с помощью космического аппарата «Розетта» // nplus1.ru

The colour-changing comet

Rosetta’s comet has been seen changing colour and brightness in front of the ESA orbiter’s eyes, as the Sun’s heat strips away the older surface to reveal fresher material. // www.esa.int

Final destination: Ma’at region

Tweet The decision has been made for the location of Rosetta’s controlled impact on Comet 67P/Churyumov-Gerasimenko on 30 September 2016, ending the mission. The spacecraft will target Ma’at, a region hosting some active pits on the small comet lobe. This region has been chosen for its scientific potential and taking into account key operational constraints involved in executing the descent. The expected time for Rosetta's contact with the surface of the comet is approximately 12:30 CEST / 10:30 UTC. More details on the timeline and likely data to be taken during the descent will follow shortly. // blogs.esa.int

Farewell, silent Philae

Tweet Tomorrow, 27 July 2016 at 09:00 UTC / 11:00 CEST, the Electrical Support System Processor Unit (ESS) on Rosetta will be switched off. The ESS is the interface used for communications between Rosetta and the lander, Philae, which has remained silent since 9 July 2015. Switching off the ESS is part of the preparations for Rosetta's end of mission. By the end of July 2016, the spacecraft will be some 520 million km from the Sun, and will start facing a significant loss of power – about 4W per day. In order to continue scientific operations over the next two months and to maximise their return, it became necessary to start reducing the power consumed by the non-essential payload components on board. No signal has been received by Rosetta from Philae since last July and earlier this year the lander was considered to be in a state of eternal hibernation. In spite of this, the ESS was kept on until now in the unlikely chance that Philae would re-gain contact. Although Rosetta has reached altitudes well below 10 km over the surface of Comet 67P/Churyumov-Gerasimenko, however, no signal from the lander was received since July 2015. The decision was taken by the mission manager and will be implemented by the Rosetta Mission Operations Centre, in coordination with the DLR Lander Control Center and the Rosetta Science Ground Segment. // blogs.esa.int

Flickr

Copyright © 2016 Yahoo! Inc. All rights reserved. From Yahoo | Your Privacy | Terms of Use flickr.com | Report Abuse | Sign In // m.flickr.com

THE SEARCH IS OVER! I’ve found @Philae2014!! https://t.co/a39zKc4Tz3 #CometLanding #PhilaeFound pic.twitter.com/Dubx5MpGSZ

— ESA Rosetta Mission (@ESA_Rosetta) September 5, 2016

Rosetta catches dusty organics

Tweet Rosetta’s dust-analysing COSIMA (COmetary Secondary Ion Mass Analyser) instrument has made the first unambiguous detection of solid organic matter in the dust particles ejected by Comet 67P/Churyumov-Gerasimenko, in the form of complex carbon-bearing molecules. While organics had already been detected in situ on the comet’s surface by instruments on-board Philae and from orbit by Rosetta’s ROSINA , those were both in the form of gases resulting from the sublimation of ices. By contrast, COSIMA has made its detections in solid dust. Their presence was only ever hinted at in previous comet missions, which flew by their targets at high speed and, as a result, disrupted the particles, making characterisation challenging. But Rosetta is orbiting Comet 67P/C-G and can catch dust particles moving at low speed. “Our analysis reveals carbon in a far more complex form than expected,” remarked Hervé Cottin, one of the authors of the paper reporting the result that is published in Nature today. “It is so complex, we can’t give it a proper formula or a name!” The organic signatures of seven particles are presented in the paper, which the COSIMA team say are representative of the two hundred plus grains analysed so far. The carbon is found to be mixed with other previously reported elements such as sodium, magnesium, aluminium, silicon, calcium and iron. It is bound in very large macromolecular compounds similar to the insoluble organic matter found in carbonaceous chondrite meteorites that have fallen to Earth, but with a major difference: there is much more hydrogen found in the comet’s samples than in meteorites. But as this kind of meteorite is associated with reasonably well-processed parent bodies such as asteroids, it is reasonable to assume that they lost their hydrogen due to heating. By contrast, comets must have avoided such significant heating to […] // blogs.esa.int

From our @ESA_Rosetta Operations Manager Sylvain Lodiot: <100hrs left until #CometLanding pic.twitter.com/1FQ0mTropl

— ESA Operations (@esaoperations) September 26, 2016

Final passivation activation commands ready for uplink to ensure @ESA_Rosetta goes to passive state on #CometLanding https://t.co/QLHdHkMhjS pic.twitter.com/NwDjxTe9Np

— ESA Operations (@esaoperations) September 29, 2016

Waiting for the Collision Burn to start in about an hour and a half (20:50 UTC / 22:50 CEST) #CometLanding pic.twitter.com/qG48yOQeid

— ESA Operations (@esaoperations) September 29, 2016

From the first part of my #CometLanding descent, taken at 01:20UT from a distance of ~16km with my OSIRIS NAC https://t.co/BmDKgQaoCn pic.twitter.com/mxOAZSxs9M

— ESA Rosetta Mission (@ESA_Rosetta) September 30, 2016

Flight dynamics team at #ESOC have confirmed @ESA_Rosetta #CometLanding time based on last orbit determination: 13:18:32CEST +/- 2mins

— ESA Operations (@esaoperations) September 30, 2016