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Sigma Sagittarii, Latinized from σ Sagittarii; formally named Nunki /ˈnʌŋki/, is the second-brightest star in the constellation of Sagittarius. It has an apparent magnitude of +2.05, making it readily visible to the naked eye. The distance to this star, determined using parallax measurements from the Hipparcos astrometry satellite, yields an value of approximately 228 light-years from the Sun.
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