Subscribe free to our newsletters via your
. 24/7 Space News .


Subscribe free to our newsletters via your




















Boosting The Accuracy Of Rosetta's Earth Approach

After entering orbit around Comet 67P/Churyumov-Gerasimenko in 2014, the spacecraft will release the lander onto the icy nucleus. It will then spend the next two years orbiting the comet as it heads towards the Sun.
by Staff Writers
Paris, France (ESA) Oct 22, 2007
Yesterday, 18 October at 18:06 CEST, the thrusters of ESA's comet chaser, Rosetta, were fired in a planned, 42-second trajectory correction manoeuvre designed to 'fine tune' the spacecraft's approach to Earth. Rosetta is now approaching Earth for its second planetary swing-by of 2007. After passing Mars in April 2007, Rosetta is now approaching Earth for the second time - the third of four planetary swing-bys that provide fuel-saving gravitational assists enabling the spacecraft to ultimately reach and cross the orbit of comet 64P/Churyumov-Gerasimenko in 2014.

Rosetta's closest approach is predicted for 21:57 CET at a height of 5301 km over the Pacific Ocean and a speed of 45 000 km/h relative to the Earth. The third and last Earth swing-by will take place in November 2009.

Rosetta lines up
"We have a target trajectory for Earth swing-by and regular orbit determinations allow us to decide when to do a correction manoeuvre. Brief burns now allow us to optimise the orbit and make the swing-by more accurate, saving us a lot of precious fuel later on," said Andrea Accommazzo, Rosetta Spacecraft Operations Manager at ESOC. He confirmed that yesterday's manoeuvre results were as expected.

A second trajectory correction slot, on 1 November, may also be used depending on results of an orbit determination scheduled for 30 October.

ESA's comet chaser
Rosetta will be ESA's first spacecraft to undertake long-term exploration of a comet at close quarters. The mission consists of a large orbiter, designed to operate for a decade at large distances from the Sun, and a small lander, Philae. Each of these carries a large suite of scientific experiments designed to complete the most detailed study of a comet ever attempted.

After entering orbit around Comet 67P/Churyumov-Gerasimenko in 2014, the spacecraft will release the lander onto the icy nucleus. It will then spend the next two years orbiting the comet as it heads towards the Sun. On the way to Comet Churyumov-Gerasimenko, Rosetta has received gravity assists from Earth and Mars, and will fly past two main-belt asteroids - Steins (September 2008), and Lutetia (July 2010).

Community
Email This Article
Comment On This Article

Related Links
Spacecraft Operations at ESA
ESA's comet chaser: Rosetta
Asteroid and Comet Mission News, Science and Technology



Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


Long-Lost, Dangerous Asteroid Is Found Again
Mountain View CA (SPX) Oct 09, 2007
Echoing the re-discovery of America by the Spanish long after an earlier Viking reconnaissance, astronomers have learned that a recently observed asteroid - one that could potentially hit the Earth - was actually first observed nearly a half-century ago. Researchers at the Minor Planet Center of the Smithsonian Astrophysical Observatory in Cambridge, MA have confirmed work by SETI Institute astronomer Peter Jenniskens that the recently discovered asteroid 2007 RR9 is in fact the long-lost object 6344 P-L.







  • Soyuz Returns Once Again
  • Broccoli Sprout-Derived Extract Protects Against Ultraviolet Radiation
  • First Stop Moon. Next Stop, Mars
  • First Malaysian in space returns to Earth

  • UA's Phoenix Mars Mission Gets A Chance To Lounge
  • Hawaii Reveals Steamy Martian Underground
  • NASA extends Mars probes' mission for 5th time
  • Hummocky And Shallow Maunder Crater

  • Successful Ariane 5 Upper Stage Engine Re-Ignition Experiment
  • ILS Proton Launch Scheduled In November For SES SIRIUS 4 Satellite
  • United Launch Alliance Managed Delta 2 Launches New GPS For US Air Force
  • ATK Propulsion And Composite Technologies Help Launch GPS Satellite

  • A Roadmap For Calibration And Validation
  • Key Found To Moonlight Romance
  • GeoEye Contract With ITT Begins Phased Procurement Of The GeoEye-2 Satellite
  • ITT Sensors Aboard DigitalGlobe's WorldView-1 Satellite Capture First High-Res Images

  • Checking Out New Horizons
  • Pluto-Bound New Horizons Sees Changes In Jupiter System
  • Maneuver Puts New Horizons On A Straight Path To Pluto
  • Outbound To The Outerplanets At 7 AU

  • To Catch A Galactic Thief
  • The Fantastic Skies Of Orphan Stars
  • Science With Integral - Five Years On
  • The Fantastic Skies Of Orphan Stars

  • China Likely To Launch First Moon Orbiter At 6pm On Oct 24th
  • Japan's Lunar Explorer Enters Observation Orbit
  • Japanese lunar probe finishes critical phase
  • USC Concept Synthesis Studio Colonizes The Moon With Bugs

  • Another GPS Satellite Successfully Launched
  • Science And Galileo - Working Together
  • Modernized GPS Built By Lockheed Martin Ready For Launch From Cape Canaveral
  • Krasnoyarsk Hosts GLONASS Development Conference

  • The content herein, unless otherwise known to be public domain, are Copyright 1995-2007 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement