Sedna, Eris and Quaoar: physical properties of prominent trans-Neptunian objects, based on Herschel observations

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The family of Trans-Neptunian objects (TNOs) may represent the most ancient form of the material from which the entire Solar System has been formed. Thus, studying both the physical and dynamical properties of these objects helps us to better understand the origin and evolution of the Solar System and we might be able to extrapolate our conclusions to other stellar, disk and planetary systems as well. Due to the enormous distance of these objects, it is not obvious to obtain even their basic physical properties. Complex and combined methods are required to derive these properties, including diameter, albedo, mass, rotational period, shape elongation and other surface parameters. Techniques obtaining these data include optical photometry, direct imaging, detection of companions, differential astrometry and detecting thermal emission.

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