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The daily processing of asteroid observations by Gaia

Muinonen, Karri; Fedorets, Grigori; Pentikäinen, Hanna +15 more

The Gaia mission started its regular observing program in the summer of 2014, and since then it is regularly obtaining observations of asteroids. This paper draws the outline of the data processing for Solar System objects, and in particular on the daily ;short-term; processing, from the on-board data acquisition to the ground-based processing. We…

Asteroid orbits with Gaia using random-walk statistical ranging

Muinonen, Karri; Fedorets, Grigori; Pentikäinen, Hanna +10 more

We describe statistical inverse methods for the computation of initial asteroid orbits within the data processing and analysis pipeline of the ESA Gaia space mission. Given small numbers of astrometric observations across short time intervals, we put forward a random-walk ranging method, in which the orbital-element phase space is uniformly sample…