Near Earth Asteroids with measurable Yarkovsky effect
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Cites background or methods from "Near Earth Asteroids with measurabl..."
...Given an estimated value of AT and the assumed value of d, one can readily derive the time-averaged da/dt using Gauss’ planetary equations (Farnocchia et al. 2013b)....
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...As the Yarkovsky induced orbital drift depends on the osculating orbital elements (Farnocchia et al. 2013b), there are also commensurable variations in the da/dt evolution (see Fig....
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...More recently Nugent et al. (2012) and Farnocchia et al. (2013b) have estimated the Yarkovsky effect for a few tens of near-Earth asteroids by using a formulation that depends on a single parameter to be determined from the orbital fit....
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...The orbital predictions and the impact hazard assessment are then performed by a Monte Carlo simulation that accounts for both the Yarkovsky effect distribution and the orbital uncertainty (Farnocchia et al. 2013a; Farnocchia and Chesley 2014)....
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...Importantly, it requires no information about the physical characteristics or spin state of the asteroid, and so it can be implemented readily in cases where only astrometric information is available (e.g., Vokrouhlický et al. 2008; Chesley et al. 2008; Nugent et al. 2012; Farnocchia et al. 2013b)....
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References
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"Near Earth Asteroids with measurabl..." refers background in this paper
...The Yarkovsky acceleration depends on several physical quantities such as spin state, size, mass, shape, and thermal properties (Vokrouhlický, 1999)....
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...The Yarkovsky acceleration depends on several physical quantities such as spin state, size, mass, shape, and thermal properties (Vokrouhlický, 1999)....
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"Near Earth Asteroids with measurabl..." refers background in this paper
...From Vokrouhlický (1998), we have at ≃ 4(1 − A) 9 Φ(r)f(Θ) cos γ , f(Θ) = 0.5Θ 1 + Θ + 0.5Θ2 (8) for the Yarkovsky diurnal component (which is typically dominant) , where A is the Bond albedo, Θ is the thermal parameter, γ is the obliquity, and 4 Φ(r) is the standard radiation force factor, which…...
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"Near Earth Asteroids with measurabl..." refers background in this paper
...These encounters transform a very well determined orbit into a poorly known one for which chaotic effects are dominant (Milani et al., 2009)....
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...Milani et al. (2009) show how the size of the semimajor axis drift along with its uncertainty modifies impact predictions for the next century for 1999 RQ36....
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