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The Gaia mission and the chronology of the Solar System

Federica Spoto
Laboratoire Lagrange, Observatoire de la Côte d’Azur, France

The ESA Gaia mission, launched in December 2013, is currently surveying the sky from the Sun-Earth Lagrangian Point (L2). It produces astrometry of stars and asteroids at the milliarcsec accuracy (V~20.7).

In September 2016 the first Gaia Data Release (GDR1) already came out, including 1.1 billion of stars with positions, and 2 million stars with positions and proper motions. The Second Data Release (GDR2) is approaching, and it will contain billions of stars with positions, proper motions, and parallaxes, and a sample of ~14.000 asteroids.

I will present the results obtained on Solar System Objects using the GDR1, and some preliminary results on the GDR2. I will then connect the properties of the Gaia mission to the determination of a new chronology of the Solar System, through the study of asteroidfamilies, and non-gravitational perturbation.

2017 November 03, 15:00

Observatório Astronómico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia