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Information × Registration Number 0200U004048, 0197U018123 , R & D reports Title Observation of variable stars, determination of chemical abundance of planetary nebulae and statistical studies of star clusters. popup.stage_title Head Golovatyj Volodymyr Volodymyrovych, Registration Date 15-06-2000 Organization Ivan Franko National University of Lviv popup.description2 The observations of variable-star Cyg X-1,TT Ari,CQ Dra and others were perfomed with 48cm reflector AZT-14.Chemical abundance of ten planetary nebulae with various physical characteristics and evolutionary age is determined as the result of photoionization model of their luminescence. Common classification of globular cluters of Galaxy, M31 and Magellanic Clouds by the methods of factor and cluster analysis is perfomed. Product Description popup.authors popup.nrat_date 2020-04-03 Close