http://webservices.esa.int/blog/blog/5 <p>Coverage of the Rosetta mission as she makes a series of complex gravity assist manoeuvres around Earth (Mar 2005, Nov 2007, Nov 2009) and Mars (Feb 2007), plus the exciting encounters with Asteroids Steins (Sep 2008) and Lutetia (Jul 2010). News and updates from the Rosetta Dedicated Control Room at ESOC, ESA's European Space Operations Centre, Darmstadt, Germany.</p> administrator 2013-06-19T23:52:56Z http://webservices.esa.int/blog/post/5/1211 <p> <a id="res_18727" href="http://webservices.esa.int/blog/gallery/5/lutetia_diagramme_10072010.png"> <div style="text-align: center"> <img src="http://webservices.esa.int/blog/gallery/5/previews-med/lutetia_diagramme_10072010.gif" border="0" alt="Location of 21 Lutetia on 10 July 2010. Image generated by NASA's Small Body Database:: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=21;orb=1;cov=0;log=0;cad=0#orb" /> </div> </a>A query was posted here in the Rosetta blog yesterday by Se7en, who noted that the Rosetta flyby media event programme for 10 July, here at ESOC, cites the closest approach time as 18:10 CEST (16:10 UTC). Se7en pointed out that we had earlier posted that the estimated closest approach time would be 15:44:55 UTC (=17:44:55 CEST).<br /> <br /> The source of the difference lies in the fact that we first posted the flyby closest approach time in 'spacecraft event time' - which is to say, the time when the event will happen at Rosetta. The time in the media event programme is cited in Earth event time - which is to say, the time when the event can be detected on Earth. </p> <p> So, why the difference? (Details after the jump...) -- Daniel </p> <p> </p> <p> The difference between the two is determined by the speed of light, 299,792 km/s. It was Einstein who first realised that this speed is a universal constant and represents the fastest possible speed at which any signal can be transmitted between two points. In other words: Earth event time = spacecraft event time one-way signal time.<br /> <br /> On 10 July, Rosetta/Lutetia will be 453 919 899.87 km from Earth - meaning that no one on Earth can possibly know that the closest approach has happened until a radio signal (which also travels at the speed of light) has covered this distance. This will take 25 minutes and 14 seconds.<br /> <br /> Therefore, in CEST (local time at Darmstadt), on 10 July:<br /> <br /> <strong>17:44:55 + 00:25:14 = 18:10:09</strong><br /> <br /> If you are in Darmstadt (or Berlin, Paris or Windhoek) on Saturday, 10 July, and you glance at your watch just before 17:45, you can truly say to yourself, &quot;A-ha - Rosetta is making her closest approach to Lutetia just about now...&quot; But there is no way that anyone on Earth can possibly know that this actually happened until just after 18:10.<br /> <br /> Note that it will take a bit longer to actually get the signal, because after the fly-by, Rosetta must take some time to slew toward Earth and start transmitting the images she recorded during closest approach. </p> <p> Note also that the flyby times are still estimates, and will possibly be off by a few percent. -- DGS </p> General Operations Press Releases 2010-07-01T16:05:39Z danielscuka http://webservices.esa.int/blog/post/5/1210 <p> <a id="res_18725" href="http://webservices.esa.int/blog/post/5/1210"><img src="http://webservices.esa.int/blog/gallery/5/previews/esa_rosetta_stream_details.gif" border="0" align="left" /></a>On 10 July, the European Space Agency will webstream Rosetta's fly-by of Asteroid Lutetia in a two-part programme live from ESOC, ESA's European Space Operations Centre, Darmstadt, Germany.<br /> <br /> ESA's comet-chaser Rosetta is heading for a blind date with asteroid Lutetia: Rosetta does not yet know what Lutetia looks like up-close but, beautiful or otherwise, the two will meet on 10 July. Like many first dates, Rosetta will meet Lutetia on a Saturday night, flying to within 3200 km of the space rock. Rosetta started taking navigational sightings of Lutetia at the end of May so that ground controllers can determine any course corrections required to achieve their intended flyby distance.<br /> <br /> The close pass will allow around 2 hours of good imaging. The spacecraft will instantly radio the data back to Earth and the first pictures will be released later that evening. The webstream is available for embed/re-casting via our channel in Livestream.com:: <a href="http://www.livestream.com/eurospaceagency" target="_blank">http://www.livestream.com/eurospaceagency</a> </p> <p> Click on 'Full story' for details on how you can embed-re-cast the webstream in your website, personal home page, blog or other channel. -- Daniel </p> <p> </p> <p> Webcast - 10 July 2010 - all times shown in CEST (= GMT + 2) </p> <p> Convert times, <a href="http://www.timeanddate.com/worldclock/meetingdetails.html?year=2010&amp;month=7&amp;day=10&amp;hour=16&amp;min=0&amp;sec=0&amp;p1=224&amp;p2=179&amp;p3=136&amp;p4=83" target="_blank">via timeanddate.com</a> </p> <p> -------------------------<br /> <strong>Programme, venue, timings</strong><br /> -------------------------<br /> <br /> Rosetta's fly-by of asteroid Lutetia<br /> 10 July 2010 18:00-23:30 CEST<br /> <br /> <span style="color: #0000ff"><strong>Part 1 - 18:00-18:45 CEST</strong></span> </p> <ul> <li>Welcome, live switch from Rosetta Control Room at ESA/ESOC, Darmstadt</li> <li><em>CLOSEST APPROACH 18:10:07 CEST</em></li> <li>Interviews with mission scientists and operations engineers</li> <li>ESA's Head of Operations, Manfred Warhaut, on why we study asteroids and ESA's new Space Situational Awareness Programme</li> <li>ESA's Director for Science, David Southwood, on the science of asteroids</li> </ul> <p> <span style="color: #0000ff"><strong>Intermission - 18:50-23:00 CEST</strong></span> </p> <ul> <li>Rosetta mission background (archive video) while scientists receive and process fly-by data and images</li> <li>Perfect break to watch World Cup soccer semi-final!! <a href="http://www.fifa.com" target="_blank">http://www.fifa.com</a></li> </ul> <p> <strong><span style="color: #0000ff">Part 2 - 23:00-23:30 CEST</span></strong> </p> <ul> <li>Introduction and presentation of images</li> <li>On-site media Q&amp;A with mission scientists</li> </ul> <p> -------------------------------<br /> <strong>Webstream embed/re-cast details</strong><br /> -------------------------------<br /> <br /> Instructions for embedding the webcast in your website, homepage or blog (see image below)<br /> </p> <ol> <li>Access <a href="http://www.livestream.com/eurospaceagency" target="_blank">http://www.livestream.com/eurospaceagency</a></li> <li>Scroll to 'Share this Channel'</li> <li>Click on 'Embed' to copy video player code --&gt; click on 'Settings' icon to customize</li> </ol> <p> <a href="http://timeanddate.com/s/1sa6" target="_blank">Start time: 09:00 PST = 12:00 EST = 16:00 UTC = 17:00 BST = 18:00 CEST</a> </p> <p> -------------------------------------------<br /> <strong>Contact for questions or technical assistance</strong><br /> -------------------------------------------<br /> <br /> Daniel Scuka<br /> ESA/ESOC<br /> <br /> dani<a href="http://www.google.com/recaptcha/mailhide/d?k=01WTXNc2ASfDvnPxblAPc5Hg==&amp;c=NdlmyFrQFnSG_8hIyMIad8sQKaOrOvHczm3JuAJtiwk=" title="Reveal this e-mail address">...</a>@esa.int </p> <p> CLICK on image to see full-size version showing where to grab embed code...&nbsp; </p> <p> <a href="http://webservices.esa.int/blog/gallery/5/esa_rosetta_stream_details.png" target="_blank"><img src="http://webservices.esa.int/blog/gallery/5/previews-med/esa_rosetta_stream_details.gif" border="0" /></a> </p> <p> &nbsp; </p> <p> &nbsp; </p> <p> &nbsp; </p> <p> &nbsp; </p> General Multimedia Press Releases 2010-06-30T16:19:05Z danielscuka http://webservices.esa.int/blog/post/5/1209 <p> <a id="res_18724" href="http://www.esa.int/esaCP/SEMC5YOZVAG_index_0.html"><img src="http://webservices.esa.int/blog/gallery/5/previews/16_asteroids_flyby.gif" border="0" align="left" /></a>The call for press has just gone out in the main ESA website. Full information and details on <a href="http://www.esa.int/esaCP/SEMC5YOZVAG_index_0.html" target="_blank">registering for the fly-by media event here at ESA/ESOC on 10 July 2010 are available here</a>. -- DGS </p> <p> &nbsp; </p> <p> &nbsp; </p> <p> &nbsp; </p> <p> &nbsp; </p> <p> &nbsp; </p> General Press Releases 2010-06-30T16:13:50Z danielscuka http://webservices.esa.int/blog/post/5/891 <p> Mission controllers have just confirmed that ESA&rsquo;s comet chaser&nbsp; Rosetta has swung by Earth at 8:45 CET as planned, skimming past our planet to pick up a gravitational boost for an epic journey to rendezvous with comet 67P/Churyumov-Gerasimenko in 2014. </p> <p> <strong><a href="http://www.esa.int/SPECIALS/Rosetta/SEMZC04VU1G_0.html" title="Rosetta bound for outer Solar System">See the complete article </a></strong>on the Rosetta website. </p> General Science Operations Press Releases Flight Dynamics 2009-11-13T09:30:52Z
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