![]() Component D has also been listed as a purely optical double by some authors,but others consider it to be part of a trapezium system of four gravitationally bound stars (plus an unseen companion). Of the five visible stars, component C is considered an optical double, not physically close to the other stars. 'A' is itself a spectroscopic binary with components designated Mu Sagittarii Aa and Ab. ![]() The components of the Mu Sagittarii system are designated 'A' through 'E', in order of their distance from the brightest, which is Mu Sagittarii A. The system is 3,000 light-years from the Sun. Polis (mu Sagittarii) is a multiple star system in the constellation of Sagittarius. ![]() This Christmas, there is a Sun-Quaoar-Polis alignment in both Ecliptic Longitude and Right Ascension. Every Christmas, there is a Sun-Polis alignment in both Ecliptic Longitude and Right Ascension.
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