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Period analysis of the eclipsing binary AI Dra |
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| Authors: | P Zasche R Uhlá? P Svoboda |
| Institution: | 1.Instituto de Astronomía,Universidad Nacional Autónoma de México,México,Mexico;2.Astronomical Institute, Faculty of Mathematics and Physics,Charles University Prague,Praha 8,Czech Republic;3.Private observatory,Jílové u Prahy,Czech Republic;4.Private observatory,Brno,Czech Republic |
| Abstract: | The eclipsing binary system AI Dra reveals changes of its orbital period. These variations could be described as a result of orbiting the eclipsing pair around a common center of mass with two unseen companions with the periods about 18 and 43 years together with a steady period increase. Fourteen new minima observations were carried out by the authors. |
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