Astrometric studies of the results of a new reduction of old photographic observations of the Saturnian System based on the comparison with the modern theories of satellite motion
| Autor: | I. S. Izmailov, T. P. Kiseleva, E. A. Roshchina, T. A. Vasil’eva |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Solar System business.product_category 010504 meteorology & atmospheric sciences Astronomy Astronomy and Astrophysics 01 natural sciences Planetary science Space and Planetary Science Observatory Saturn Celestial coordinate system Physics::Space Physics 0103 physical sciences Satellite Astrophysics::Earth and Planetary Astrophysics Right ascension business 010303 astronomy & astrophysics 0105 earth and related environmental sciences Digital camera |
| Zdroj: | Solar System Research. 50:402-407 |
| ISSN: | 1608-3423 0038-0946 |
| DOI: | 10.1134/s0038094616050014 |
| Popis: | The paper shows the possibility of increasing the accuracy of the results of photographic observations of Saturn and its moons made in the 1970s and reduced using the old reference star catalogues and semiautomatic measurements. New celestial coordinates of the moons (from the third to the eighth), “satellite minus satellite” relative moon coordinates, and Saturn coordinates by positions of satellites are obtained without measuring its images. The results are stored in the Pulkovo Observatory database on the Solar System bodies and are available online at www.puldb.ru. The efficiency of the reduction method based on digitizing of astronegatives using 21 Mpx Canon digital camera and IZMCCD software is shown. The comparison of new results of old observations with the latest theories of moon motion has revealed a significant increase in satellite positioning accuracy. The investigation of the differences (O–C) of celestial coordinates from satellite positions in their apparent Saturn-centric orbits has revealed a noticeable motion of the differences (O–C) in right ascension depending on their distances from Saturn for all moons. |
| Databáze: | OpenAIRE |
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