Delta Librae

δ Librae
Observation data
Epoch J2000      Equinox J2000
Constellation Libra
Right ascension 15h 00m 58.4s
Declination 08° 31 08.0
Apparent magnitude (V) 4.43
Characteristics
Spectral type B9.5V
Variable type Eclipsing binary
Astrometry
Distance300 ly
Other designations
Zuben Elakribi, 19 Librae, HIP 73473

Delta Librae (δ Librae, δ Lib) is a variable star in the constellation Libra. It has the traditional name Zuben Elakribi, a variant of the traditional name of Gamma Librae.[1] With μ Vir it forms one of the Akkadian lunar mansions 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.

Along with λ Tau, it was one of the first stars on which rotational line broadening[4] was observed, by Frank Schlesinger in 1911.

References

  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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