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Words near each other
・ Iota and Jot
・ Iota Andromedae
・ Iota Antliae
・ Iota Apodis
・ Iota Aquarii
・ Iota Aquilae
・ Iota Arae
・ Iota Arietis
・ Iota Aurigae
・ Iota Beta Chi
・ Iota Boötis
・ Iota Cancri
・ Iota Canis Majoris
・ Iota Capricorni
・ Iota Carinae
Iota Cassiopeiae
・ Iota Centauri
・ Iota Cephei
・ Iota Ceti
・ Iota Chamaeleontis
・ Iota Coronae Borealis
・ Iota Crucis
・ Iota Cygni
・ Iota Delphini
・ Iota Delta
・ Iota Draconis
・ Iota Draconis b
・ Iota Eridani
・ Iota Geminorum
・ Iota Gruis


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Iota Cassiopeiae : ウィキペディア英語版
Iota Cassiopeiae

Iota Cassiopeiae (ι Cas, ι Cassiopeiae) is a star system in the constellation Cassiopeia. It is approximately 141.6 light years from Earth.
The primary component, ι Cassiopeiae A, is a white A-type main sequence dwarf with a mean apparent magnitude of +4.64. It is classified as an α² Canum Venaticorum type variable star and the brightness of the system varies from magnitude +4.45 to +4.53 with a period of 1.74 days. Component A is a spectroscopic binary. Its unresolved companion has an orbital period of 52.4 years and is separated from the primary by 0.113 arcseconds, or at least 5 AU.
The second astrometric component, ι Cassiopeiae B, is a yellow-white F-type main sequence dwarf with an apparent magnitude of +6.89. It is 2.27 arcseconds, or at least 100 AU, from the primary. It has an orbital period of 840 years. The third astrometric component, ι Cassiopeiae C, is a yellow G-type dwarf, with an apparent magnitude of +8.40. It is 7.3 arcseconds (at least 300 AU) from the primary.




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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