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Delta Librae (δ Librae / δ Lib) is a variable star in the constellation Libra. It has the proper name Zuben Elakribi.[1] And it with μ Vir are one of the Akkadian lunar mansion Mulu-izi,[2] (meaning "Man-of-fire"[3]).

δ Lib is approximately 300 light years from the Earth and belongs to the spectral class B9.5V. It is an eclipsing binary star, with a period of 2.3272 days. Its apparent magnitude varies from 4.43m to 5.81m.

It, along with λ Tau, was the first star on which rotational line broadening[4] was observed, by Frank Schlesinger in 1911. the magnitdue of 3.60


  1. ^ Bečvář, A., Atlas Coeli II Atlas Coeli II- Catalog, Ceskoslovenské Akademie Ved, Praha,1959.
  2. ^ Allen, R. H., (1963). Star Names: Their Lore and Meaning (rep. ed.). New York, NY: Dover Publications Inc..  pp. 277, 473.
  3. ^ Brown Jr., R., (1891). "Remarks on the Euphratean Astronomical Names of the Signs of the Zodiac", Proceedings of the Society of Biblical Archaeology, vo. 13, p. 194.
  4. ^ Schlesinger, F., (1909). "Rotation of Stars about their Axes", Monthly Notices of the Royal Astronomical Society, Vol. 71, p.719.


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