Delta Librae
Encyclopedia
Delta Librae is a variable star
in the constellation
Libra
. It has the proper name Zuben Elakribi. With μ Vir
it forms one of the Akkadian lunar mansions Mulu-izi (meaning "Man-of-fire").
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 was observed, by Frank Schlesinger
in 1911.
Variable star
A star is classified as variable if its apparent magnitude as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Libra
Libra (constellation)
Libra is a constellation of the zodiac. Its name is Latin for weighing scales, and its symbol is . It is fairly faint, with no first magnitude stars, and lies between Virgo to the west and Scorpius to the east.-Notable features:]...
. It has the proper name Zuben Elakribi. With μ Vir
Mu Virginis
Mu Virginis is a star in the constellation Virgo. It has the traditional name Rijl al Awwa.Rijl al Awwa is a yellow star of apparent magnitude 3.88 and spectral class F2 III about 61 light years from Earth.-Etymology:...
it forms one of the Akkadian lunar mansions Mulu-izi (meaning "Man-of-fire").
δ Lib is approximately 300 light years from the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
and belongs to the spectral class
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
B9.5V. It is an eclipsing binary star, with a period of 2.3272 days. Its apparent magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
varies from 4.43m to 5.81m.
Along with λ Tau
Lambda Tauri
Lambda Tauri is a triple star system in the constellation Taurus. The primary component, Lambda Tauri A, is a blue-white B-type main sequence dwarf with a mean apparent magnitude of +3.41. It has a luminosity of about 4,000 times that of the Sun and a radius of 6.6 times solar. The companion is a...
, it was one of the first stars on which
rotational line broadening was observed, by Frank Schlesinger
Frank Schlesinger
Frank Schlesinger was an American astronomer. His work concentrated on using photographic plates rather than direct visual studies for astronomical research.-Biography:...
in 1911.