On the detection of the Yarkovsky effect on near-Earth asteroids by means of Gaia

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• 作者：Marco Delbo’ ; Paolo Tanga ; Francois Mignard
• 关键词：Gaia ; Asteroids ; Near-Earth objects ; Dynamics
• 刊名：Planetary and Space Science
• 出版年：2008
• 出版时间：November 2008
• 年：2008
• 卷：56
• 期：14
• 页码：1823-1827
• 全文大小：306 K

文摘

The Yarkovsky effect, which causes a slow drifting of the orbital elements (mainly the semimajor axis) of km-sized asteroids and meteors, is the weak non-gravitational force experienced by these bodies due to the emission of thermal photons. This effect is believed to play a role in the delivery of near-Earth asteroids (NEAs) from the main belt, in the spreading of the orbital elements of asteroid families, and in the orbital evolution of potentially hazardous asteroids.

Here we present preliminary results of simulationing indicating that the perturbations induced by the Yarkovsky effect on the positions of some tens of NEAs can be observed by means of the high-precision astrometric observations that will be provided by the ESA mission Gaia.