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Rosetta flyby of Asteroid Lutetia
Hungry4info
post Jul 10 2010, 03:54 PM
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Well, we passed closest approach a few minutes ago.

Edit: And here comes the live webcast.


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Phil Stooke
post Jul 10 2010, 04:21 PM
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http://webservices.esa.int/blog/post/5/1246

Pics!

Phil


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Hungry4info
post Jul 10 2010, 04:22 PM
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Behold Lutetia:

Edit: He beat me to it
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Alan Stern
post Jul 10 2010, 04:38 PM
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QUOTE (Paolo @ May 1 2010, 08:38 AM) *
This is interesting: the Ptolemy mass spectrometer on the Rosetta orbiter will attempt to detect a faint exosphere around Lutetia


Alice UVS is doing the same.
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alan
post Jul 10 2010, 04:48 PM
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Contact reestablished following close approach
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kenny
post Jul 10 2010, 05:02 PM
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Wonderful images! 100 km across and no evidence of gravitional rounding. Any thoughts / evidence on what size that effect kicks in?

Congratulations to ESA.
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Guest_cassioli_*
post Jul 10 2010, 05:03 PM
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Guests
fly-by mission accomplished. smile.gif
heading to the comet now. rolleyes.gif
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Phil Stooke
post Jul 10 2010, 05:07 PM
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"100 km across and no evidence of gravitional rounding. Any thoughts / evidence on what size that effect kicks in?"

That depends on the internal strength of the object, including its temperature history. Vesta at 500 km across is noticeably irregular - but rocky - whereas icy Mimas is only 400 km across and a bit elongated by tidal effects but a nice ellipsoidal shape.

Phil


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Loiserl
post Jul 10 2010, 05:08 PM
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I just put the Lutetia close-up animation. I'll add more info for the Spanish speakers too: http://www.espaciosur.com.ar/2010/07/image...on-rosetta.html - Cheers.


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dilo
post Jul 10 2010, 05:27 PM
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Loiserl, you beat me. In my version, I introduced dissolvence between most recent frames because the time lapse is clearly larger...
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Stu
post Jul 10 2010, 05:37 PM
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QUOTE (Hungry4info @ Jul 10 2010, 04:36 PM) *
Phil Stooke just posted that.

Very easily done, and it really doesn't matter, does it?


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Phil Stooke
post Jul 10 2010, 06:10 PM
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Playing around with contrast a bit and rearranging the images in the big composite...

Attached Image


One frame was flipped (mirror-image) left-right - the top one in the left column in this version.
The second image in the sequence (one up from lower left corner) is approximately the same view as the last image, so these cover a full rotation. They are approximately north-up here. Images of course are courtesy ESA and the Rosetta and OSIRIS teams, and a big thanks to them for releasing them so soon.

Phil


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dilo
post Jul 10 2010, 07:23 PM
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Thank you Phil for your analysis... I used last two frames (with some relative rotation) in order to create following stereograms:
crossed eyes:
Attached Image

parallel eyes:
Attached Image

Some artifacts/incongruences are due to slightly different illumination, I guess!


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alan
post Jul 10 2010, 09:03 PM
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Live webcast is started
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ugordan
post Jul 10 2010, 09:04 PM
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http://webservices.esa.int/blog/post/5/1247

Lutetia and Saturn!!! http://webservices.esa.int/blog/gallery/5/..._and_Saturn.png


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