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Stellar occultations enable milliarcsecond astrometry for Trans-Neptunian objects and Centaurs
, Article Astronomy and Astrophysics ; Volume 644 , 2020 ; Braga Ribas, F ; Desmars, J ; Camargo, J. I. B ; Ortiz, J. L ; Sicardy, B ; Vieira-Martins, R ; Assafin, M ; Santos-Sanz, P ; Duffard, R ; Fernández Valenzuela, E ; Lecacheux, J ; Morgado, B. E ; Benedetti Rossi, G ; Gomes-Júnior, A. R ; Pereira, C. L ; Herald, D ; Hanna, W ; Bradshaw, J ; Morales, N ; Brimacombe, J ; Burtovoi, A ; Carruthers, T ; De Barros, J. R ; Fiori, M ; Gilmore, A ; Hooper, D ; Hornoch, K ; Jacques, C ; Janik, T ; Kerr, S ; Kilmartin, P ; Winkel, J.M ; Naletto, G ; Nardiello, D ; Nascimbeni, V ; Newman, J ; Ossola, A ; Pál, A ; Pimentel, E ; Pravec, P ; Sposetti, S ; Stechina, A ; Szakáts, R ; Ueno, Y ; Zampieri, L ; Broughton, J ; Dunham, J. B ; Dunham, D.W ; Gault, D ; Hayamizu, T ; Hosoi, K ; Jehin, E ; Jones, R ; Kitazaki, K ; Komž Ík, R ; Marciniak, A ; Maury, A ; Mikuž, H ; Nosworthy, P ; Fábrega Polleri, J ; Rahvar, S ; Sfair, R ; Siqueira, P. B ; Snodgrass, C ; Sogorb, P ; Tomioka, H ; Tregloan Reed, J ; Winter, O. C ; Sharif University of Technology
EDP Sciences
2020
Abstract
Context. Trans-Neptunian objects (TNOs) and Centaurs are remnants of our planetary system formation, and their physical properties have invaluable information for evolutionary theories. Stellar occultation is a ground-based method for studying these distant small bodies and has presented exciting results. These observations can provide precise profiles of the involved body, allowing an accurate determination of its size and shape. Aims. The goal is to show that even single-chord detections of TNOs allow us to measure their milliarcsecond astrometric positions in the reference frame of the Gaia second data release (DR2). Accurate ephemerides can then be generated, allowing predictions of...