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Rosetta mission: Philae comet lander pictures its target | Rosetta mission: Philae comet lander pictures its target |
(7 months later) | |
The Philae robot, soon to try to land on Comet 67P, has taken another dramatic image of its quarry. | The Philae robot, soon to try to land on Comet 67P, has taken another dramatic image of its quarry. |
The picture is very similar to the one it acquired in mid-September - only this one is much closer, snapped from a distance of just 16km. | |
Also new in this picture is 67P's activity. Jets of gas and dust can be seen streaming away from the "neck" region of the rubber duck-shaped comet. | |
Philae is due to make its historic landing attempt on 12 November. | |
It is currently riding piggyback on its "mothership", the Rosetta probe. | |
You can just see the corner of this spacecraft on the left of the image, with one of its 14m-long solar wings dominating the foreground. | |
The plan is for Rosetta to eject Philae towards 67P just after 0830 GMT on the 12th. | |
The small gravitational tug from the 4km-wide comet should be enough to pull the robot on to its surface in a descent that is likely to take about seven hours to complete. | |
If the lander survives this fall, it will be a first. Never before in the history of space exploration has a soft touchdown been made on one of these "ice mountains". | |
The new "selfie" released by the European Space Agency is actually a composite of two images taken in quick succession but with different exposure times. | |
This allowed the very different contrast conditions to be balanced across the entire vista. | |
Philae acquired the frames on 7 October. It will be the last view from the robot's CIVA camera system until just after separation from Rosetta. | |
The plan is for Philae to grab a "goodbye" shot of Rosetta as the pair start to recede from each other. | |
Assuming the landing succeeds, CIVA will then take a full 360-degree panorama of its touchdown location. | |
This is a relatively flat terrain on the "head" of the duck, currently dubbed "Site J" after its position in a list of possible destinations in the site selection process. | |
Mission planners were due to meet on Tuesday to give a final confirmation to the J target. This ought to have been a formality. | |
The big caveat is if Rosetta has seen a "showstopper" in its recent close-in mapping campaign. This would have to be an extremely dangerous surface feature that had gone unrecognised in previous, lower-resolution imaging. | |
If a no-go situation has been indentified, planners would then move their attention to a back-up landing target on the "body" of the duck called "Site C". | |
Rosetta, Philae and Comet 67P are currently moving through space some 480 million km from Earth. | |
Comet 67P/Churyumov-Gerasimenko | |
Jonathan.Amos-INTERNET@bbc.co.uk and follow me on Twitter: @BBCAmos | Jonathan.Amos-INTERNET@bbc.co.uk and follow me on Twitter: @BBCAmos |
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