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'''Sigma Coronae Borealis''' is a triple star system composed of three sunlike stars in the constellation ].<ref name=kalersigma>{{cite web| first1=James B. | last1=Kaler | title=Sigma Coronae Borealis | work=Stars | publisher=University of Illinois | url=http://stars.astro.illinois.edu/sow/sigmacrb.html | accessdate=23 November 2014}}</ref>
'''Sigma Coronae Borealis''' is a multiple star system in the constellation ], the main components of which are three sunlike stars.<ref name=kalersigma>{{cite web| first1=James B. | last1=Kaler | title=Sigma Coronae Borealis | work=Stars | publisher=University of Illinois | url=http://stars.astro.illinois.edu/sow/sigmacrb.html | accessdate=23 November 2014}}</ref> Appearing as a single star of apparent magnitude 5.64 to the unaided eye, Sigma can be separated into Sigma<sup>1</sup> and Sigma<sup>2</sup> when observed with a telescope. The two take 726 years to orbit each other. Sigma<sup>1</sup> is a yellow main sequence star of spectral type G1V and weighing around 1 ]. Sigma<sup>2</sup> is a spectroscopic binary system composed of two stars very close (6 solar radii) together that orbit each other every 1.14 days.
Sigma Coronae Borealis, TZ Coronae Borealis, HD 146361, BD+34° 2750, HIP 79607, GC 21863, SAO 65165.
Sigma Coronae Borealis is a multiple star system in the constellation Corona Borealis, the main components of which are three sunlike stars. Appearing as a single star of apparent magnitude 5.64 to the unaided eye, Sigma can be separated into Sigma and Sigma when observed with a telescope. The two take 726 years to orbit each other. Sigma is a yellow main sequence star of spectral type G1V and weighing around 1 solar mass. Sigma is a spectroscopic binary system composed of two stars very close (6 solar radii) together that orbit each other every 1.14 days.
