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[AF>EDLS] Polynesia
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Message 439 - Posted: 11 Dec 2012, 18:57:17 UTC

Hello,

We going to do calculations with data from the observation of the passage of the asteroid Toutatis tomorrow at 7 million kilometers ? thank you
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[AF>EDLS] Polynesia
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Message 441 - Posted: 11 Dec 2012, 23:08:17 UTC - in response to Message 439.

Are we going to perform calculations on data related to the near-earth fly of the asteroid Toutatis tomorrow at 7 million kilometers ? thank you
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Josef Durech
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Message 442 - Posted: 12 Dec 2012, 8:59:51 UTC - in response to Message 441.

Are we going to perform calculations on data related to the near-earth fly of the asteroid Toutatis tomorrow at 7 million kilometers ? thank you


No. Asteroid Toutatis is in so called "excited" rotation state, its spin axis is not fixed in space and its complex rotation can be described as free precession of an asymmetric top. The code we use assumes that the asteroid rotates around an axis fixed in space with a constant rotation period. Moreover, the shape and spin state of Toutatis is well known from radar measurements and should be confirmed by the Chang'E 2 space probe.

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Message 450 - Posted: 12 Dec 2012, 20:44:18 UTC - in response to Message 442.

The code we use assumes that the asteroid rotates around an axis fixed in space with a constant rotation period.


Approximately what percentage of asteroids fall into that category (rotation on fixed axis and constant rotation period)? Just trying to get an idea of the scope of the research going on here.


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Message boards : Science : Asteroid Toutatis


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