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Home Sweet
Home: Earth From Rosetta
Submitted by KNN on 13 Nov 2009 - 12:21pm
This spectacular image of our home planet was captured by
the OSIRIS instrument on ESA's Rosetta comet chaser earlier today as the
spacecraft approached Earth for the third and final swingby. This morning,
mission controllers confirmed that ESA’s comet chaser Rosetta had 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.
Rosetta passed over the ocean, just South of the Indonesian island of Java, at
exactly 08:45:40 CET, at a speed of 13.34 km/s with respect to Earth an an
altitude of 2481 km. The swingby was pre-planned and fully automated, and the
spacecraft was in direct communication with Earth at the time, via the ESa New
Norcia Station.
The successful swingby was confirmed at 09:05 CET when
mission controllers re-established contact with Rosetta via ESA’s Maspalomas
station in Spain. Although a detailed analyses is in progress, spacecraft
operators have confirmed that the swingby provided a boost of 3.6 km/s.
Europe’s comet chaser has now flown a little over 4500
million km of its 7100 million km journey to its destination comet
67P/Churyumov-Gerasimenko. This was Rosetta’s fourth planetary swingby and the
third and final swingby of Earth.
Some of Rosetta’s instruments have been on since early
November, performing imaging, magnetospheric, and atmospheric observations, as
well as looking for water on the Moon. The first round of images and data
recorded just before and during the swingby will be downloaded later today.
Rosetta is now departing Earth to meet asteroid (21) Lutetia
in July 2010. It has gained sufficient orbital energy to achieve its final
goal: a rendezvous with comet 67P/Churyumov-Gerasimenko in 2014. The spacecraft
is scheduled to enter deep-space hibernation by mid 2011 for the coldest leg of
her journey to receive a wake up call only in spring 2014.
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Credits: ESA ©2009 MPS for OSIRIS Team
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