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室女座ET，又名BD-15 3817，HD 123934、SAO 158401、HR 5301，是室女座的一颗恒星，视星等为4.91，位于銀經329.16，銀緯42.49，其B1900.0坐标为赤經14h 5m 22.6s，赤緯-15° 42.49′ 47″。
, ET Virginis is a single, red-hued star in … ET Virginis is a single, red-hued star in the equatorial constellation of Virgo. It can be viewed with the naked eye, having an apparent visual magnitude of 4.91. Based upon an annual parallax shift of 5.9 mas, it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, having come within 177 ly of the Sun around 6.3 million years ago. This is an evolved red giant star with a stellar classification of M2 IIIa. It is a semiregular variable star of subtype SRB with a magnitude that ranges from a high of 4.80 down to 5.00. The measured angular diameter of this star, after correcting for limb darkening, is 4.79±0.34 mas. At its estimated distance, this yields a physical size of 83 times the radius of the Sun.al size of 83 times the radius of the Sun.
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−0.81
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M2 IIIa
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3.24
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0.2552
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5.8655
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83
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3899
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| rdfs:comment |
室女座ET，又名BD-15 3817，HD 123934、SAO 158401、HR 5301，是室女座的一颗恒星，视星等为4.91，位于銀經329.16，銀緯42.49，其B1900.0坐标为赤經14h 5m 22.6s，赤緯-15° 42.49′ 47″。
, ET Virginis is a single, red-hued star in … ET Virginis is a single, red-hued star in the equatorial constellation of Virgo. It can be viewed with the naked eye, having an apparent visual magnitude of 4.91. Based upon an annual parallax shift of 5.9 mas, it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, having come within 177 ly of the Sun around 6.3 million years ago.y of the Sun around 6.3 million years ago.
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ET Virginis
, 室女座ET
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