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- T Persei is a red supergiant located in the constellation Perseus. It varies in brightness between magnitudes 8.3 and 9.7 and is considered to be a member of the Double Cluster. T Persei is a member of the Perseus OB1 association around the h and χ Persei open clusters, around 2 degrees north of the centre of the clusters. It is generally treated as an outlying member of the clusters. It lies half a degree away from S Persei, another red supergiant Double Cluster member. T Per is a semiregular variable star, whose brightness varies from magnitude 8.34 to 9.7 over a period of 2,430 days. Unlike many red supergiants, it does not appear to have a long secondary period. It is relatively inactive for the red supergiant star, with low mass loss rate 8×10−6 Solar_mass/year and no detectable dust shell. The Washington Double Star Catalog lists T Persei as having a 9th magnitude companion 0.1 arc-seconds away. This is derived from Hipparcos measurements. However, no other sources report a companion. (en)
- ペルセウス座T星（ペルセウスざティーせい）は、ペルセウス座にある脈動変光星。 (ja)
- T Persei är en röd superjätte och en variabel stjärna av halvregelbunden typ (SRC) i stjärnbilden Perseus. Stjärnan varierar mellan visuell magnitud +8,34 och 9,7 med en period av 2430 dygn eller 6,65 år. (sv)
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- ペルセウス座T星（ペルセウスざティーせい）は、ペルセウス座にある脈動変光星。 (ja)
- T Persei är en röd superjätte och en variabel stjärna av halvregelbunden typ (SRC) i stjärnbilden Perseus. Stjärnan varierar mellan visuell magnitud +8,34 och 9,7 med en period av 2430 dygn eller 6,65 år. (sv)
- T Persei is a red supergiant located in the constellation Perseus. It varies in brightness between magnitudes 8.3 and 9.7 and is considered to be a member of the Double Cluster. T Persei is a member of the Perseus OB1 association around the h and χ Persei open clusters, around 2 degrees north of the centre of the clusters. It is generally treated as an outlying member of the clusters. It lies half a degree away from S Persei, another red supergiant Double Cluster member. (en)
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- ペルセウス座T星 (ja)
- T Persei (en)
- T Persei (sv)
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