{"id":9515,"date":"2014-12-22T12:01:38","date_gmt":"2014-12-22T17:01:38","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=9515"},"modified":"2014-12-22T12:01:38","modified_gmt":"2014-12-22T17:01:38","slug":"esa-rosettas-movie-of-comet-67pc-g","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=9515","title":{"rendered":"ESA Rosetta&#8217;s movie of Comet 67P\/C-G"},"content":{"rendered":"<p>The <a href=\"http:\/\/rosetta.esa.int\/\" target=\"_blank\">ESA Rosetta<\/a> team has created\u00a0a sequence of images showing the rotation of Comet 67P\/Churyumov-Gerasimenko:<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"http:\/\/blogs.esa.int\/rosetta\/2014\/12\/19\/cometwatch-the-movie\/\" target=\"_d\">CometWatch \u2013 The Movie<\/a><\/strong><\/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\/Vod9NzH17Vw?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>As the incredible year of 2014 draws to a close, we have prepared a small treat for all of the readers of this blog who have followed Rosetta&#8217;s progress over the months, in particular those who like to download images and play with them.<\/p>\n<p>We started our CometWatch in <a title=\"CometWatch \u2013 24 July\" href=\"http:\/\/blogs.esa.int\/rosetta\/2014\/07\/25\/cometwatch-24-july\/\">July<\/a>, when Rosetta was still a few thousand kilometres away from Comet 67P\/Churyumov-Gerasimenko. We saw this curiously-shaped comet grow larger and richer in details <a title=\"Arriving at last\" href=\"http:\/\/blogs.esa.int\/rosetta\/2014\/08\/06\/arriving-at-last\/\">as the spacecraft got closer and closer<\/a> until rendezvous at 100 km on 6 August. The NAVCAM images released over that period provided a good overview of our approach to this amazing new world.<\/p>\n<p>In September, as we drew closer to the comet, we had to switch to taking four-image mosaics in order to ensure that we could cover enough of it for navigation purposes. Since then, we have been publishing some of these four-image sets as montages and mosaics, as well as releasing the individual frames so that you could work with them and create your own mosaics. Some have been taken within 8 km of the surface of 67P\/C-G, providing <a title=\"CometWatch \u2013 28 October\" href=\"http:\/\/blogs.esa.int\/rosetta\/2014\/10\/31\/cometwatch-28-october\/\">amazing views<\/a>.<\/p>\n<p>But to mark the end of this exciting year, instead of just one new image, montage, or mosaic, the last CometWatch release of the year is &#8230; a movie, featuring no less than 24 montages based on NAVCAM images taken between 19 November and 3 December 2014. A reduced version of the movie can be seen inline here, but the full-sized version is available if you click through.<\/p>\n<p>These images were taken while Rosetta was in a 30-km orbit around the comet (see the second half of this <a href=\"http:\/\/www.esa.int\/spaceinvideos\/Videos\/2014\/10\/Rosetta_close_orbits_to_lander_deployment\" target=\"_blank\">video<\/a> showing the trajectory of the spacecraft after 12 November). As usual, each montage comprises four individual images taken over a 20-minute period, at either around 11:00 UT (12:00 CET) or 23:00 UT (0:00 Next Day CET). At 30 km from the comet&#8217;s centre, the pixel scale is about 2.56 m\/pixel.<\/p>\n<p><a href=\"http:\/\/www.esa.int\/spaceinimages\/Images\/2014\/11\/Rosetta_path_after_12_November\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" aligncenter\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2014\/11\/rosetta_path_after_12_november\/15025315-1-eng-GB\/Rosetta_path_after_12_November_node_full_image_2.jpg\" alt=\"\" width=\"700\" height=\"451\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><em>The path of Rosetta after 12 November 2014. Credit: ESA<\/em><\/p>\n<p>As Comet 67P\/C-G rotates with a period of 12.4 hours, images taken at 12-hour intervals result in views that are slightly offset with respect to one another, as the comet will have completed slightly less than a full rotation in that time.<\/p>\n<p>In addition, there is also the orbital motion of Rosetta with respect to the comet: over the two weeks over which the images were taken, Rosetta completed almost one full orbit at 30 km from the comet.<\/p>\n<p>Taking these factors into account, we have ordered the images according to the apparent rotation phase in order to make a movie. In fact, we have sorted the images in an almost reverse chronological sequence, starting with a montage taken on 2 December, then working backwards one day at a time to 19 November. The last montage in the sequence, however, is from 3 December.<\/p>\n<p>Given the limited time available to us in the run up to Christmas, this is all we have been able to do: a phase-ordered sequence of montages made into a movie. There has been no processing of the images apart from the removal of the basic instrumental signature.<\/p>\n<p>But we know that you can do better, and as a thank you to everyone who has produced and shared dozens and dozens of excellent NAVCAM mosaics and images over the past few months, we\u2019ve made the full set of <a href=\"http:\/\/sci.esa.int\/science-e\/www\/object\/doc.cfm?fobjectid=55168\" target=\"_blank\">24 montages<\/a> and of <a href=\"http:\/\/sci.esa.int\/science-e\/www\/object\/doc.cfm?fobjectid=55167\" target=\"_blank\">96 individual 1024 x 1024 pixel frames<\/a> available for download.<\/p>\n<p>So, if you have the time over the holiday period, we invite you to create your own mosaics and perhaps even your own movies, and to share them on your social networks under the terms of the Creative Commons licence that applies to NAVCAM images (CC BY-SA IGO 3.0). Let us know about them in the New Year.<\/p>\n<p>For those who want to know exactly where the spacecraft was at the moment when each image was taken and perhaps factor that into their movie-making, the so-called &#8216;SPICE&#8217; files for Rosetta are available <a href=\"ftp:\/\/ssols01.esac.esa.int\/pub\/data\/SPICE\/ROSETTA\/kernels\/\" target=\"_blank\">here<\/a>, and the tools to read and process those files can be found <a href=\"http:\/\/naif.jpl.nasa.gov\/pub\/naif\/toolkit\/\" target=\"_blank\">here<\/a>. Few parameters are already included in the filenames of the provided images, such as rotation phase, date and time (rot.phase_ESA_ROSETTA_NAVCAM_yymmddThh).<\/p>\n<p>We hope you have enjoyed following our CometWatch in 2014 and we are looking forward to another exciting year as 67P\/C-G gets closer and closer to the Sun. Rosetta will be there to monitor its changes and discover what it really means \u201cto live with a comet\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ESA Rosetta team has created\u00a0a sequence of images showing the rotation of Comet 67P\/Churyumov-Gerasimenko: CometWatch \u2013 The Movie As the incredible year of 2014 draws to a close, we have prepared a small treat for all of the readers of this blog who have followed Rosetta&#8217;s progress over the months, in particular those who &hellip; <a href=\"https:\/\/hobbyspace.com\/Blog\/?p=9515\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">ESA Rosetta&#8217;s movie of Comet 67P\/C-G<\/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_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":"","jetpack_post_was_ever_published":false},"categories":[75,13,26],"tags":[],"class_list":["post-9515","post","type-post","status-publish","format-standard","hentry","category-asteroids","category-space-science","category-space-systems"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-2tt","jetpack-related-posts":[{"id":9127,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9127","url_meta":{"origin":9515,"position":0},"title":"Latest Rosetta images","author":"TopSpacer","date":"October 30, 2014","format":false,"excerpt":"The Rosetta spacecraft continues to take amazing photos of comet\u00a0 67P\/C-G as it gets closer and closer to it. Check out these image galleries: Space in Images - Missions - Rosetta CometWatch \u2013 26 October | Rosetta - ESA's comet chaser A feast of comet features from Rosetta at Churyumov-Gerasimenko\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":"ESA_Rosetta_NAVCAM_141026_mosaic-922x1024[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/10\/ESA_Rosetta_NAVCAM_141026_mosaic-922x10241.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8465,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8465","url_meta":{"origin":9515,"position":1},"title":"Rosetta nears its comet","author":"TopSpacer","date":"August 3, 2014","format":false,"excerpt":"Rosetta\u00a0is getting closer and closer to comet\u00a0t 67P\/Churyumov\u2013Gerasimenko (or 67P\/C-G):\u00a0How Rosetta arrives at a comet - ESA. \u00a0The spacecraft will slow down on Wednesday, August 6th and maneuver to go into orbit around the object.\u00a0 From a 1000 km on Comet at 1000 km | Rosetta - ESA's comet chaser\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":"sfh_CG_1000km-1024x812","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/08\/sfh_CG_1000km-1024x812.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8579,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8579","url_meta":{"origin":9515,"position":2},"title":"More Rosetta photos of comet 67P\/C-G","author":"TopSpacer","date":"August 14, 2014","format":false,"excerpt":"Rosetta\u00a0returns more great pictures of the comet\u00a0t 67P\/Churyumov-Gerasimenko:\u00a0 *\u00a0CometWatch \u2013 12 August | Rosetta - ESA's comet chaser Full-frame NAVCAM image taken on 12 August 2014 from a distance of about 103 km from comet 67P\/Churyumov-Gerasimenko. Credits: ESA\/Rosetta\/NAVCAM *\u00a0CometWatch \u2013 13 August | Rosetta - ESA's comet chaser Full-frame NAVCAM\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":"Full-frame NAVCAM image taken on 12 August 2014 from a distance of about 103 km from comet 67P\/Churyumov-Gerasimenko. Credits: ESA\/Rosetta\/NAVCAM","src":"https:\/\/i0.wp.com\/blogs.esa.int\/rosetta\/files\/2014\/08\/ESA_ROSETTA_NAVCAM_20140812.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8742,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8742","url_meta":{"origin":9515,"position":3},"title":"Rosetta images comet 67 P\/C-G emissions; Landing sites under study","author":"TopSpacer","date":"September 5, 2014","format":false,"excerpt":"The European Space Agency's\u00a0Rosetta\u00a0spacecraft circling Comet 67P\/Churyumov-Gerasimenko is sending lots of great pictures of the odd duck-shaped object:\u00a0CometWatch \u2013 2 September - Rosetta Blog In the\u00a0two lower images shown below, you can see the faint traces of dust and water vapor emissions, signs that the comets tail is starting to\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":"ESA_Rosetta_NAVCAM_20140902_montage-1024x1024[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/09\/ESA_Rosetta_NAVCAM_20140902_montage-1024x10241.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8480,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8480","url_meta":{"origin":9515,"position":4},"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":10441,"url":"https:\/\/hobbyspace.com\/Blog\/?p=10441","url_meta":{"origin":9515,"position":5},"title":"Latest Rosetta images of Comet 67P\/C-G","author":"TopSpacer","date":"April 23, 2015","format":false,"excerpt":"Wonderful new\u00a0images of Comet 67P\/Churyumov-Gerasimenko\u00a0from Rosetta \"ESA's comet chaser\"\u00a0have been released in the past week or so: *\u00a0OSIRIS catches activity in the act\u00a0- The comet\u2019s activity has been significantly increasing over the last weeks and months. 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