XI Scorpii (Paperback)

High Quality Content by WIKIPEDIA articles! Xi Scorpii is a star system in the constellation Scorpius. It was also 51 Lib. The Xi Scorpii system consists of at least five stars in two groups separated by 4.67 arcminutes (or 0.08) on the sky, corresponding to a distance of at least 8000 Astronomical Units (AU). The brighter group contains Xi Scorpii A, B, and C. A and B are both yellow-white F-type stars. A is a slightly brighter and warmer magnitude +4.8 subgiant, while B is a magnitude +5.1 main sequence dwarf. They are separated by 0.76 arcseconds, or at least 21 AU, roughly a Sun-Uranus distance, and orbit around a common centre once every 46 years. The magnitude +7.6 Xi Scorpii C orbits this pair at ten times the distance, having a separation of 7.6 arcseconds.