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Libra's status as the location of the equinox earned the equinox the name "First Point of Libra", though this location ceased to coincide with the constellation in 730 BC because of the precession of the equinoxes. In ancient Egypt the three brightest stars of Libra (α, β, and σ Librae) formed a constellation that was viewed as a boat. [7]
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.
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]
Constellation map. Subcategories. This category has the following 2 subcategories, out of 2 total. ... Libra (constellation) * List of stars in Libra; 0–9. 2MASS ...
NGC 5605 is an intermediate spiral galaxy in the constellation of Libra.Its velocity with respect to the cosmic microwave background is 3635 ± 18 km/s, which corresponds to a Hubble distance of 174.9 ± 12.3 Mly (53.61 ± 3.76 Mpc). [1]
HD 140283 (also known as the Methuselah star) is a metal-poor subgiant star about 200 light years away from the Earth in the constellation Libra, near the boundary with Ophiuchus in the Milky Way Galaxy. Its apparent magnitude is 7.205, so it can be seen with binoculars. It is one of the oldest stars known.
NGC 5885 is an intermediate barred spiral galaxy located in the constellation Libra. Its speed relative to the cosmic microwave background is 2,185 ± 13 km/s, which corresponds to a Hubble distance of 32.3 ± 2.3 Mpc (~105 million ly). [1] NGC 5885 was discovered by German-British astronomer William Herschel in 1784. [2]
NGC 5898 is an elliptical galaxy in the constellation of Libra. Its velocity with respect to the cosmic microwave background is 2301 ± 13 km/s, which corresponds to a Hubble distance of 33.93 ± 2.38 Mpc (∼111 million light-years). [1] It was discovered by German-British astronomer William Herschel on 21 May 1784. [2]