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・ Tau Sigma Phi
・ Tau Taa Wana
・ Tau tau
・ Tau Tauri
・ Tau Ursae Majoris
・ Tau Virginis
・ Tau Zero
・ Tau'ri characters in Stargate
・ Tau'uta Reds
・ Tau, American Samoa
・ Tau, Norway
・ Tau-gu
・ Tau-leaping
・ Tau-protein kinase
・ Tau-Titi
Tau1 Aquarii
・ Tau1 Arietis
・ Tau1 Capricorni
・ Tau1 Eridani
・ Tau1 Gruis
・ Tau1 Gruis b
・ Tau1 Lupi
・ Tau1 Serpentis
・ Tau2 Aquarii
・ Tau2 Arietis
・ Tau2 Capricorni
・ Tau2 Eridani
・ Tau2 Lupi
・ Tau2 Serpentis
・ Tau3 Eridani


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Tau1 Aquarii : ウィキペディア英語版
Tau1 Aquarii


Tau1 Aquarii (τ1 Aqr, τ1 Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 5.66,〔 it is a faint naked eye that requires dark suburban skies for viewing. Parallax measurements made during the Hipparcos mission yield a distance estimate of roughly from Earth.〔
τ1 Aquarii has a stellar classification of B9 V;〔 right along the borderline between a B- and A-type main sequence star. It is around 100〔 million years old and has twice the Sun's radius.〔 When examined in the infrared band, it displays an excess emission that is a characteristic of stars with an orbiting debris disk. Indeed, the model that best fits the data suggests there are two concentric circumstellar disks.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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