Betelgeuse at the end of 2019: an historical minimum about to end
| Autor: | Sigismondi, Costantino |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The semi-regular variable star Betelgeuse is undergoing an historical minimum of its brightness. An 8 year series of visual and V-band CCD observations started at the end of 2011 is presented and discussed. Visual methods for comparing magnitudes of angularly distant stars, and performing a differential photometry, needed for such a bright star, are also presented. Comment: 4 pages, 2 figures, 1 table |
| Databáze: | arXiv |
| Externí odkaz: |
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