New astrometric measurement and reduction of USNO photographic observations of the main Saturnian satellites: 1974−1998
| Autor: | Valery Lainey, Jean-Eudes Arlot, William Thuillot, Dan Pascu, V. Robert, J. P. de Cuyper, Véronique Dehant |
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| Přispěvatelé: | Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Polytechnique des Sciences Avancées (IPSA), United States Naval Observatory (USNO), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Royal Observatory of Belgium [Brussels] (ROB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Astronomy Astronomy and Astrophysics Astrometry Ephemeris 01 natural sciences symbols.namesake 13. Climate action Space and Planetary Science Planet Observatory [SDU]Sciences of the Universe [physics] Refracting telescope 0103 physical sciences symbols Satellite Titan (rocket family) 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2016, 596, pp.A37. ⟨10.1051/0004-6361/201629807⟩ Astronomy and Astrophysics-A&A, 2016, 596, pp.A37. ⟨10.1051/0004-6361/201629807⟩ |
| ISSN: | 0004-6361 |
| DOI: | 10.1051/0004-6361/201629807⟩ |
| Popis: | International audience; Context. Accurate positional measurements of planets and satellites are used to improve our knowledge of their orbits and dynamics, and to infer the accuracy of the planet and satellite ephemerides. Aims. In the framework of the European FP7 ESPaCE program, we provide the positions of Saturn and its main satellites taken with the US Naval Observatory 26-inch refractor from 1974 to 1998. Methods. We measured 526 astrophotographic plates with the digitizer of the Royal Observatory of Belgium and reduced them through an optimal process that includes image, instrumental, and spherical corrections using the UCAC4 catalog to provide the most accurate equatorial (RA, Dec) positions. Results. We compared the observed positions of the satellites with the theoretical positions from INPOP13c and DE432 planetary ephemerides and from NOE-6-2015-SAT and SAT375 satellite ephemerides. The mean post-fit rms residuals in equatorial positions range from ±68 mas for the Titan observations or 400 km at Saturn, to ±100 mas for the Hyperion observations or 600 km at Saturn. The mean post-fit rms intersatellite residuals range from ±46 mas for the Rhea-Titan observations or 280 km at Saturn, to ±72 mas for the Hyperion-Titan observations or 430 km at Saturn. |
| Databáze: | OpenAIRE |
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