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AR Cassiopeiae : ウィキペディア英語版 | AR Cassiopeiae
AR Cassiopeiae (AR Cas) is a multiple star system in the constellation of Cassiopeia. It is thought to be a septuple star system. It is one of only two star systems with a multiplicity of 7, the other being Nu Scorpii, with no physical multiple stars of greater multiplicity yet found.〔Monthly Notices of the Royal Astronomical Society, "A catalogue of multiplicity among bright stellar systems", Eggleton, P. P.; Tokovinin, A. A., Volume 389, Issue 2, pp. 869-879, ''September 2008'', , , , (VizieR ) (accessed 2010-10-27)〕〔Astronomy & Astrophysics Supplement Series, ("MSC - a catalogue of physical multiple stars" ), Tokovinin, A. A., Vol. 124, July 1997, pp.75-84, ''July 1997'', , , (VizieR ) (accessed 2010-10-27)〕〔Springer-Verlag "Observing and Measuring Visual Double Stars" (Patick Moore's Practical Astronomy Series), Bob Argyle, ed., ''2004'', ISBN 1-85233-558-0 , pg.9〕 The star was frequently referred to as IH Cas (or IH Cas) in literature.〔The Observatory, "IH Cas = AR Cas", W.B. Somerville, vol. 106, p. 40-42, ''April 1986'', 〕 The origin of the designation "IH Cassiopeiae" is from the 17th century catalogue and constellation map by Johannes Hevelius, which was kept in use due to the lack of a Flamsteed designation or Bayer designation for the star.〔 It was the first star in Cassiopeia that Hevelius catalogued, thus "1 Hev. Cas" or "1 H. Cas" (similar to Gould designations), which becomes IH Cas through corruption.〔 The primary star of the system is Type-B and Class-IV〔 and sub component of the system is an Algol-type eclipsing binary.〔 The system is also considered a visual double star.〔Journal of Astronomy, "Studies of visual double stars", D. D. Meisel, no.73, pp.350-360, ''June 1968'', , 〕 == References ==
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