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X Sagittarii
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Geliefert zwischen Mi., 26.11.2025 und Do., 27.11.2025
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High Quality Content by WIKIPEDIA articles! X Sagittarii is a Cepheid variable star in the constellation Sagittarius. This variable star changes in apparent magnitude from +4.24 to +4.84 with a period of 7.01 days. Its change in brightness is accompanied by a change in spectral classification, from G2 to F5. A Cepheid is a member of a class of pulsating variable stars. The relationship between a Cepheid variable's luminosity and pulsation period is quite precise, securing Cepheids as viable standard candles and the foundation of the Extragalactic Distance Scale. Typical classical Cepheids pulsate with periods of a few days to months, and their radii change by several million kilometers (30%) in the process. They are large, luminous stars, of spectral class F6 K2, they are 5 20 times as massive as the Sun and up to 30000 times more luminous.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131435652
- Editor Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
- Genre Physik & Astronomie
- EAN 9786131435652
- Titel X Sagittarii
- Herausgeber Betascript Publishing
- Anzahl Seiten 168
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