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Rosetta Earth Swingby media presentation 13.11.2009

Rosetta Earth Swingby media presentation 13.11.2009



Presentation to the media given at ESA/ESOC on 13 November 2009 during the closest approach of Rosetta for her third and last earth swingby.

Presentation to the media given at ESA/ESOC on 13 November 2009 during the closest approach of Rosetta for her third and last earth swingby.



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    Rosetta Earth Swingby media presentation 13.11.2009 Rosetta Earth Swingby media presentation 13.11.2009 Presentation Transcript

    • ROSETTA’s LAST EARTH SWINGBY ESA Control Centre, Darmstadt Friday, 13 November 2009
    • The Rosetta Mission Dr Gerhard Schwehm Rosetta Mission Manager & Head of Solar System Science Operations Division, ESA
    • Rosetta - a brief overview
      • Rosetta is an ESA scientific cornerstone mission
      • Initially studied as an ESA/NASA comet-nucleus sample return mission, it later became a European-only mission (with 3 NASA instruments) to perform in-situ measurements at the comet
      • Rosetta was endorsed by ESA in 1993 and launched in 2004
      • 67/P Churyumov-Gerasimenko is the final target comet, to be reached in 2014
      • A very precise injection into interplanetary orbit by Ariane 5 allowed Rosetta to have enough fuel for two asteroid encounters on the way:
      • - (2867) Steins, 5 September 2008 - (21) Lutetia, 10 July 2010
    • Rosetta firsts
      • Rosetta will be the first mission to rendezvous with a comet nucleus and orbit it for an extended period
      • Rosetta will be the first mission to deploy a Lander (Philae) onto the surface of a comet nucleus.
    • Rosetta’s objectives
      • Bringing a lab to a comet!
        • determine the physical properties and the chemical composition of a comet by in-situ investigations
      • Study the evolution of the cometary phenomena (coma and tail) while the comet approaches the Sun
      • Observe at least one asteroid from close by, so to study another class of primitive members of the solar system to understand better how it was formed
    • Rosetta’s journey to 67P/Churyumov-Gerasimenko
        • Basically it is half-time for the mission
        • A little more than 5 years after launch and a little less than 5 years to reach the comet
        • The spacecraft has been performing extremely well and so have the teams here at ESOC, who are at the controls, at ESAC and the experiment teams
    • Rosetta’s journey to 67P/Churyumov-Gerasimenko
      • All major milestones to bring Rosetta to the comet are completed…
    • Launch 2 March 2004, from Kourou, French Guyana
    • First Earth swingby, 4 March 2005
    • Mars swingby, 25 February 2007
    • Second Earth swingby 13 November 2007
    • Steins flyby at a distance of 800 km, 5 September 2008
      • Today final planetary swingby to bring Rosetta on its way to comet 67P/Churyumov-Gerasimenko in 2014.
    • Rosetta Earth swingby 3 Scientific Observations Dr Rita Schulz Rosetta Project Scientist, ESA
      • Last planetary swingby of Rosetta
      • Closest approach: 13 November 07:45 UT, 2,480 km above Earth surface
      • Moon closest approach: 13 November 15:41 UT at 220,000 km
      • Remote sensing instruments will perform science and calibration measurements
      • Limited visibility of Rosetta from Earth (observations from ESA/OGS on Tenerife)
      • Closest approach over day side
      • Over night side until shortly before the closest approach over the Pacific Ocean
      ROSETTA EARTH SWINGBY 3 Scientific Observations
    • ROSETTA EARTH SWING BY 3 Scientific Observations Participating instruments and science measurements (6-19 November) RPC All sensors active (9-16 November) Earth-Moon system, plasma & magnetospheric studies OSIRIS Imaging of Earth (e.g. Berlin, NYC, Atlantic, islands in south pacific) and Moon ALICE Star occultation by Moon VIRTIS Earth night-side observations MIRO Moon studies (search for water) OSIRIS/VIRTIS/ALICE Auroral search and study, upper atmosphere, oxygen night glow
    • Rosetta Critical swingby events Andrea Accomazzo Rosetta Spacecraft Operations Manager, ESA
    • Interplanetary Trajectory
      • Heliocentric speeds:
        • Earth 30 km/s @ 150 Mkm from the Sun
        • Comet 33 km/s @ 186 Mkm from the Sun
      • Rosetta heliocentric speeds:
        • After launch 30.0 km/s
        • After 1 st Earth swingby 33.8 km/s
        • After 2 nd Earth swingby 35.1 km/s
        • After 3 rd Earth swingby 38.7 km/s
    • Earth swingby 3
    • Navigation Towards the Earth
    • OSIRIS image 12 Nov 2009 Credit: ESA ©2009 MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA
    • The swingby as seen from the Earth
      • Closest approach (or perigee):
      • Time 07:45:40 UTC
      • Altitude 2481 km
      • Geocentric speed 13.34 km/s or 48,024 km/h
    • Rosetta Future Mission Milestones Dr Paolo Ferri Head of Solar and Planetary Missions Division
    • Mission Profile
    • Future Mission Milestones
      • Asteroid Lutetia flyby: 10 th July 2010;
      • Deep Space Hibernation: July 2011-January 2014;
      • Comet arrival: May 2014;
      • Landing: November 2014;
      • Perihelion: August 2015;
      • End of mission: December 2015.