Feeds

Comet-hunting Rosetta films distant asteroid

And snaps pics of Mars

Build a business case: developing custom apps

The comet-hunting spacecraft Rosetta has sent back its first sighting of the asteroid 21-Lutetia, one of two rocky bodies it will study en route to the comet 67p Churyumov-Gerasimenko. It will not get anywhere close to the rock for more than two years, but has already begun sending back preliminary data.

A view of Mars and the Milky Way from Rosetta

Once the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) mounted onboard the Rosetta orbiter was up and running, it began tracking the asteroid. Along with its planned observations of asteroid 2867-Steins, this early study of the 100km-wide Lutetia will help the mission in a number of ways.

Like comets, asteroids contain much information about the conditions of the early solar system. One of Rosetta's primary goals is to help scientists gain a better understanding of this.

So far, the images sent back amount to little more than a stationary white blob against a background of cosmic rays smashing into the OSIRIS detector on board Rosetta. Not surprising, considering it is still some 245 million kilometres away. ESA has posted an animated sequence here.

For now the ESA scientists have been analysing how the light emitted by the asteroid changes intensity. This will allow them to build a light curve for the asteroid, and therefore work out the direction in which it is rotating.

In July 2010, Rosetta will pass much closer to Lutetia, coming within 3,000km of the rock. ESA scientists hope this early long range study will allow them a chance to practise their observational techniques for the later, closer mission.

Before that, in September 2008, Rosetta will make a close pass of the much smaller Steins asteroid.

The next encounter for Rosetta is Mars. The comet-chaser will make its closest approach to the red planet on 27 February, gaining a velocity boost from the encounter. Late last year, after an instrument check, Rosetta sent back a stunning picture of an overexposed Mars against the backdrop of the Milky Way (above). ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
China building SUPERSONIC SUBMARINE that travels in a BUBBLE
Shanghai to San Fran in two hours would be a trick, though
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

Top 10 endpoint backup mistakes
Avoid the ten endpoint backup mistakes to ensure that your critical corporate data is protected and end user productivity is improved.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up distributed data
Eliminating the redundant use of bandwidth and storage capacity and application consolidation in the modern data center.
The essential guide to IT transformation
ServiceNow discusses three IT transformations that can help CIOs automate IT services to transform IT and the enterprise
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.