κ Librae (kappa Librae)

Above the horizon. Rise: 18:26 | Tran: 22:38 | Set: 2:53

Alt: 17.72° Az: 193.76° Direction: South-West

κ Librae is a variable and double hypergiant star of spectral class M0 in the constellation of Libra.

κ Librae visual magnitude is 4.74. Because of its moderate brightness, κ Librae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of κ Librae. The red arrow shows the motion of κ Librae during the next 1000 years (-0.62 arcmin in Right Ascension and -1.72 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 43m 25s

Declination -19° 45’ 31”

Hour Angle 00h 55m 42s

Sidereal Time 16h 39m 07s

J2000

Right Ascension 15h 41m 56s

Declination -19° 40’ 44”

Galactic Coordinates

Galactic Longitude 348.94°

Galactic Latitude 27.58°

Finder Chart

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Finder chart for κ Librae (kappa Librae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.74

Class Hypergiant

Absolute magnitude -0.70

Spectral Type M0III

Color Index (B-V) 1.57

Temperature 3691K

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

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

Star System Properties

κ Librae is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the κ Librae double sysyem:

Main star magnitude 4.74

Secondary star magnitude 9.74

Magnitude difference 5

Separation 172 arcsec

Distance, Radial Speed, Proper Motion

κ Librae is distant 399.51 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 122.55

Distance (light year) 399.51

Radial Speed -4 km/s

Proper Motion RA -0.037 arcsec/y

Proper Motion Dec -0.103"/y

Alternative Designations

Bayer designation κ Librae
(kappa Librae)

Flamsteed designation 43 Librae

Henry Draper Catalogue HD139997

SAO Catalogue SAO159442

Hipparcos Catalogue HIP76880

Durchmusterung Catalogue BD-19 4188

FK5 Catalogue 1413

General Catalogue of Variable Stars 7200

Visibility from Your Location

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

Azimuth: 109.8° RISE 18:26

Max altitude: 18.8° TRANSIT 22:38

Azimuth: 250.2° SET 2:53

Set Location

Other stars in Libra