Shaping Asteroids with Genetic Evolution (SAGE). (arXiv:1904.08940v1 [astro-ph.EP])

Shaping Asteroids with Genetic Evolution (SAGE). (arXiv:1904.08940v1 [astro-ph.EP])
<a href="http://arxiv.org/find/astro-ph/1/au:+Bartczak_P/0/1/0/all/0/1">P. Bartczak</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dudzinski_G/0/1/0/all/0/1">G. Dudzi&#x144;ski</a>

In this work we present SAGE (Shaping Asteroid models using Genetic
Evolution) asteroid modelling algorithm based solely on photometric lightcurve
data. It produces non-convex shapes, rotation axes orientati and rotational
periods of asteroids. The main concept behind a genetic evolution algorithm is
to produce random populations of shapes and spin orientations by mutating a
seed shape and iterating the process until it converges to a stable global
minimum. To test SAGE we have performed tes on five artificial shapes. We have
also modelled (433) Eros and (9) Meti asteroids, as ground truth observations
for them exist, allowing us to validate the models. We have compared derived
Eros shape with NEAR Shoem model and Metis shape with adaptive optics and
stellar occultation observations as with other available Metis models from
various inversion methods.

In this work we present SAGE (Shaping Asteroid models using Genetic
Evolution) asteroid modelling algorithm based solely on photometric lightcurve
data. It produces non-convex shapes, rotation axes orientati and rotational
periods of asteroids. The main concept behind a genetic evolution algorithm is
to produce random populations of shapes and spin orientations by mutating a
seed shape and iterating the process until it converges to a stable global
minimum. To test SAGE we have performed tes on five artificial shapes. We have
also modelled (433) Eros and (9) Meti asteroids, as ground truth observations
for them exist, allowing us to validate the models. We have compared derived
Eros shape with NEAR Shoem model and Metis shape with adaptive optics and
stellar occultation observations as with other available Metis models from
various inversion methods.

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