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Delta Circini : ウィキペディア英語版
Delta Circini


Delta Circini (d Cir), is a star located in the constellation Circinus. Delta Circini is also known as HR 5664, and HD 135240. Delta Circini is a binary system. The system is located at Right Ascension 15h 16m 57s and Declination -60 deg 57 arcmin 27 arcsec. The system has a combined apparent visual magnitude of +5.09, and is located at a distance of 1.958 kpc (6388 ly) from the Sun.
Delta Circini A is one of the more luminious stars in the galaxy. The star is an O8.5V dwarf star with an effective temperature of 35000 Kelvin. It has an apparent visual magnitude +5.1, an absolute magnitude of -6.42 and a mass of 21 solar masses. Delta Circini A is an ellipsoidal variable star.
Delta Circini B, also known as CD 605539B, is a white dwarf companion to A. It has an apparent visual magnitude of +13.5.
The angular separation between A and B is approximately 50 arcsec.
== References ==

*http://www.alcyone.de/cgi-bin/search.pl?object=HR5664
*http://server3.wikisky.org/starview?object_type=1&object_id=2005
*http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CD-60++5539B&NbIdent=query_hlinks&Coord=15+16+49.9-60+57+26&submit=parents&hlinksdisplay=h_all


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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