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Tau Librae, Latinized from τ Librae, is the Bayer designation for a binary star system at the southern edge of the zodiac constellation of Libra. It can be seen with the naked eye, having an apparent visual magnitude of 3.68. [2] The distance to this system is around 367 light years, as determined from an annual parallax shift of 8.89 mas. [1]
The constellation Libra marked on a naked eye view. Overall, there are 83 stars within the constellation's borders brighter than or equal to apparent magnitude 6.5. [a] [2] The brightest stars in Libra form a quadrangle that distinguishes it for the unaided observer. Traditionally, Alpha and Beta Librae are considered to represent the scales ...
Kappa Librae, Latinized from κ Librae, is the Bayer designation for a star system in the zodiac constellation of Libra. Its apparent visual magnitude is 4.72, [2] so it can be seen with the naked eye. The annual parallax shift of 10.57 mas [1] indicates it is roughly 310 light years away. It is positioned 0.02 degrees south of the ecliptic.
α Librae (Latinised to Alpha Librae) is the system's Bayer designation.. Zubenelgenubi / ˌ z uː b ən ɛ l dʒ ə ˈ n uː b i /, also rendered Zuben Elgenubi, derives from the Arabic ّالزُبَانَى الجَنُوبِي al-zubānā al-janūbiyy "the southern claw", which was coined before Libra was recognized as a constellation distinct from Scorpius.
σ Librae (Latinised to Sigma Librae) is the system's current Bayer designation (the star originally bore the designation Gamma Scorpii [16] and did not receive its current designation until the new designation was agreed upon by Commission 3 of the International Astronomical Union (IAU) on July 31, 1930. [17])
A light curve for Iota 1 Librae plotted from STEREO data, adpated from Wraight et al. (2012) [7]. Iota 1 Librae is a four star system. [3] The inner pair, designated components Aa and Ab, form a spectroscopic binary with an orbital period of 22.35 years and an eccentricity of 0.35. [5]
θ Librae, Latinised as Theta Librae, is a single [9] star in the southern zodiac constellation of Libra, near the constellation border with Scorpius.It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.14. [2]
ζ 2 Librae (abbreviated Zeta 2 Librae, Zeta 2 Lib, ζ 2 Lib), also known as 33 Librae, is a variable star in the constellation Libra. It is approximately 261 light-years away from the Sun. [2] Zeta 2 Librae does not have an HR number, although it is included in the Bright Star Catalogue Supplement. [3] [4]