(meteorobs) Re: 1972 Draconids [was 2005 Draconids]
Jeremie VAUBAILLON
vaubaill at imcce.fr
Thu Jan 27 05:01:54 EST 2005
A comment about the YORP effect:
It causes a change of the SPIN rate or axis of the small celestial
bodies, so that does NOT cause any change of orbital parameter. However,
the change of spin rate or axis causes a change of the Yarkovsky effect,
and this one causes a change of orbit. So the YORP effect is not
DIRECTLY linked to non-gravitational perturbations.
Jeremie
--
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* Jeremie VAUBAILLON
* Dept. of Physics & Astronomy
* University of Western Ontario
* London, Ontario
* N6A 3K7
* CANADA
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* tel : +1 519-661-2111--87985
* fax : +1 519-661-4085
* URL : www.imcce.fr/~vaubaill/
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