{"id":6136,"date":"2014-01-20T18:33:06","date_gmt":"2014-01-20T18:33:06","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=6136"},"modified":"2014-01-21T00:55:08","modified_gmt":"2014-01-21T00:55:08","slug":"rosetta-spacecraft-awakens","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=6136","title":{"rendered":"Rosetta spacecraft awakens"},"content":{"rendered":"<p>After a 31 month hibernation period, the Europe Space Agency&#8217;s <a href=\"http:\/\/sci.esa.int\/rosetta\/\" target=\"_d\">Rosetta<\/a> spacecraft has awakened and sent radio signals indicating that it has reactivated itself:\u00a0<a href=\"http:\/\/www.spaceflightnow.com\/rosetta\/status.html\" target=\"_d\">Rosetta Mission Report | Mission Status Center &#8211; Spaceflight Now<\/a>.<\/p>\n<p>Rosetta was launched on an\u00a0\u00a0Ariane 5G+ rocket on March 2, 2004. It flew passed\u00a0asteroids 2867 Steins (in 2008) and 21 Lutetia (in 2010), and then went into hibernation in 2011. It will now pursue its main goal, comet\u00a067P\/Churyumov-Gerasimenko. It will rendezvous with the comet in August 2014 and go into orbit around it. It will also put a small lander on the comet.<\/p>\n<p>Here&#8217;s a short ESA video about Rosetta waking up from its hibernation period:<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/UqcDtRmJbKY?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>Caption:<\/p>\n<blockquote><p>Visualisation of how the Rosetta spacecraft wakes up from deep space hibernation, 673 million kilometres from the Sun, on 20 January 2014.<\/p>\n<p>Prior to entering hibernation on 8 June 2011, Rosetta was oriented so that its solar arrays faced the Sun, and it began rotating once per minute for stability. The only devices left running were its computer and several heaters.<\/p>\n<p>Rosetta&#8217;s computer is programmed to carry out a sequence of events to re-establish contact with the Earth on 20 January, starting with an &#8216;alarm clock&#8217; at\u00a0<a href=\"https:\/\/www.youtube.com\/watch?v=UqcDtRmJbKY#\">10:00<\/a>\u00a0GMT. Immediately after, the star trackers begin to warm up. Around 6 hours later the thrusters are fired and the slow rotation stops. A slight adjustment is made to Rosetta&#8217;s orientation to ensure that the solar arrays now face the Sun. Then the star trackers switch on to determine its attitude. The spacecraft rotates towards Earth, and the transmitter is switched on. Then Rosetta&#8217;s high-gain antenna points to Earth and the signal is sent. The journey takes 45 minutes before the signal is received and mission controllers can begin to check Rosetta&#8217;s health, ready for the next phase of the mission.<\/p><\/blockquote>\n<p><strong>Update<\/strong>: Here&#8217;s a cute animated depiction of the Rosetta mission:<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/trljrwTbr4w?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>After a 31 month hibernation period, the Europe Space Agency&#8217;s Rosetta spacecraft has awakened and sent radio signals indicating that it has reactivated itself:\u00a0Rosetta Mission Report | Mission Status Center &#8211; Spaceflight Now. Rosetta was launched on an\u00a0\u00a0Ariane 5G+ rocket on March 2, 2004. It flew passed\u00a0asteroids 2867 Steins (in 2008) and 21 Lutetia (in &hellip; <a href=\"https:\/\/hobbyspace.com\/Blog\/?p=6136\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Rosetta spacecraft awakens<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[75,13],"tags":[],"class_list":["post-6136","post","type-post","status-publish","format-standard","hentry","category-asteroids","category-space-science"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-1AY","jetpack-related-posts":[{"id":9982,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9982","url_meta":{"origin":6136,"position":0},"title":"Video: Rosetta&#8217;s closest encounter with Comet 67P\/C-G","author":"TopSpacer","date":"February 24, 2015","format":false,"excerpt":"This ESA video reports on\u00a0the recent Rosetta\u00a0fly-by of\u00a0 Comet 67P\/Churyumov-Gerasemenko:\u00a0Space in Videos - 2015 - 02 - Rosetta's closest encounter - ESA On 14 February 2015, Rosetta made its closest encounter with comet 67P\/Churyumov-Gerasemenko at just 6 km from the surface. The spacecraft is no longer orbiting the comet, it\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/mBpGUPCXQhk\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8480,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8480","url_meta":{"origin":6136,"position":1},"title":"Rosetta nears comet rendezvous","author":"TopSpacer","date":"August 5, 2014","format":false,"excerpt":"The European Space Agency's\u00a0Rosetta\u00a0spacecraft will rendezvous with \u00a0Comet 67P\/Churyumov-Gerasimenko on Wednesday. \u00a0Find lots of info, images, videos, etc of the approach and rendezvous at the webstie\u00a0Rosetta | rendevous with a comet. A livestream webcast will start on Wednesday at 08:00UTC (4:00 am EDT). \u00a0Here's the\u00a0Rosetta timeline\u00a0for events in this initial\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"Crop from the 3 August image of comet 67P\/Churyumov-Gerasimenko. Credits: ESA\/Rosetta\/NAVCAM","src":"https:\/\/i0.wp.com\/blogs.esa.int\/rosetta\/files\/2014\/08\/ESA_ROSETTA_NAVCAM_20140803_cropped_scaledx2.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":9253,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9253","url_meta":{"origin":6136,"position":2},"title":"Philae comet lander in hibernation","author":"TopSpacer","date":"November 15, 2014","format":false,"excerpt":"The Philae lander has now gone quiet due to insufficient light hitting\u00a0its solar panels. However, the Rosetta control team downloaded a great deal of science data before it went down. There remains hope that as the comet circles the sun, there will be an angle where the panels are once\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"Philae_s_first_touchdown_seen_by_Rosetta_s_NavCam_large[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/11\/Philae_s_first_touchdown_seen_by_Rosetta_s_NavCam_large1.gif?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":13270,"url":"https:\/\/hobbyspace.com\/Blog\/?p=13270","url_meta":{"origin":6136,"position":3},"title":"ESA Rosetta mission ends with spacecraft impacting the surface of Comet 67P\/C-G","author":"TopSpacer","date":"September 30, 2016","format":false,"excerpt":"The European Space Agency (ESA) ended the\u00a0Rosetta\u00a0mission to Comet 67P\/Churyumov\u2013Gerasimenko today by maneuvering the spacecraft onto (or, more likely, into) the surface of the comet:\u00a0Mission complete: Rosetta\u2019s journey ends in daring descent to comet -\u00a0ESA ESA\u2019s historic Rosetta mission has concluded as planned, with the controlled impact onto the comet\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"comet_landing_site_node_full_image_21","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2016\/09\/Comet_landing_site_node_full_image_21.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":10772,"url":"https:\/\/hobbyspace.com\/Blog\/?p=10772","url_meta":{"origin":6136,"position":4},"title":"The Philae lander on Comet 67P\/C-G breaks long silence","author":"TopSpacer","date":"June 14, 2015","format":false,"excerpt":"An announcement from the European Space Agency (ESA): Rosetta's lander Philae wakes up from hibernation 14 June 2015\u00a0Rosetta's lander Philae has woken up after seven months in hibernation on the surface of Comet 67P\/Churyumov-Gerasimenko. From animation\u00a0of the Philae lander. The signals were received at ESA's European Space Operations Centre in\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"Philae_touchdown_large[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2015\/06\/Philae_touchdown_large1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":9218,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9218","url_meta":{"origin":6136,"position":5},"title":"Video: ESA Rosetta webcast for Philae landing on Comet 67P\/C-G","author":"TopSpacer","date":"November 11, 2014","format":false,"excerpt":"The webcast of the release of the Philae lander from the Rosetta spacecraft has begun:\u00a0Rosetta | rendezvous with a comet. The actual separation and landing will not happen till tomorrow (Nov.12): Separation of the lander is planned for about 09:03 GMT (10:03 CET) [4:03 am EDT], and touch down should\u2026","rel":"","context":"In &quot;Asteroids &amp; Comets&quot;","block_context":{"text":"Asteroids &amp; Comets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=75"},"img":{"alt_text":"What_does_Philae_do_during_descent[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/11\/What_does_Philae_do_during_descent1-614x1024.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/6136","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6136"}],"version-history":[{"count":8,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/6136\/revisions"}],"predecessor-version":[{"id":6147,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/6136\/revisions\/6147"}],"wp:attachment":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}