Zubenelgenubi - α2 Librae (alpha2 Librae)

Below the horizon. Rise: 19:19 | Tran: 23:52 | Set: 4:30

Alt: -17.23° Az: 265.54° Direction: West

Zubenelgenubi, also designated as α2 Librae (alpha2 Librae), is a variable and multiple sub-giant star of spectral class A3 in the constellation of Libra.

Zubenelgenubi visual magnitude is 2.75. Because of its brightness, Zubenelgenubi is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Zubenelgenubi - α2 Librae (alpha2 Librae) star

DSS2 image of Zubenelgenubi. The red arrow shows the motion of Zubenelgenubi during the next 1000 years (-1.77 arcmin in Right Ascension and -1.12 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 52m 17s

Declination -16° 08’ 42”

Hour Angle 06h 30m 13s

Sidereal Time 21h 22m 31s

J2000

Right Ascension 14h 50m 52s

Declination -16° 02’ 30”

Galactic Coordinates

Galactic Longitude 340.33°

Galactic Latitude 38.01°

Finder Chart

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Finder chart for Zubenelgenubi - α2 Librae (alpha2 Librae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.75

Class Sub-giant

Absolute magnitude 0.88

Spectral Type A3IV

Color Index (B-V) 0.15

Temperature 8571K

The red dot in the diagram below shows where Zubenelgenubi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of Zubenelgenubi. Attribution: Richard Powell / CC BY-SA

Star System Properties

Zubenelgenubi is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Zubenelgenubi double sysyem:

Main star magnitude 2.75

Secondary star magnitude 3.15

Magnitude difference 0.4

Separation 0 arcsec

Distance, Radial Speed, Proper Motion

Zubenelgenubi is distant 77.16 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 23.67

Distance (light year) 77.16

Radial Speed -10 km/s

Proper Motion RA -0.106 arcsec/y

Proper Motion Dec -0.067"/y

Alternative Designations

Proper Name Zubenelgenubi

Bayer designation α2 Librae
(alpha2 Librae)

Flamsteed designation 9 Librae

Henry Draper Catalogue HD130841

SAO Catalogue SAO158840

Hipparcos Catalogue HIP72622

Durchmusterung Catalogue BD-15 3966

Gliese Catalogue Gl 564.1

FK5 Catalogue 548

General Catalogue of Variable Stars 6827

Visibility from Your Location

Today's Zubenelgenubi - α2 Librae (alpha2 Librae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 106.1° RISE 19:19

Max altitude: 22.4° TRANSIT 23:52

Azimuth: 253.9° SET 4:30

Set Location

Other stars in Libra