δ Librae (delta Librae)

Above the horizon. Rise: 11:23 | Tran: 16:37 | Set: 21:52

Alt: 28.34° Az: 198.05° Direction: South-South-West

δ Librae is a variable and multiple main-sequence star of spectral class B9 in the constellation of Libra.

δ Librae visual magnitude is 4.92. Because of its moderate brightness, δ 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 δ Librae. The red arrow shows the motion of δ Librae during the next 10000 years (-10.50 arcmin in Right Ascension and -0.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 02m 17s

Declination -08° 36’ 55”

Hour Angle 01h 04m 03s

Sideral Time 16h 06m 21s

J2000

Right Ascension 15h 00m 58s

Declination -08° 31’ 08”

Galactic Coordinates

Galactic Longitude 348.87°

Galactic Latitude 42.51°

Finder Chart

Simplified finder chart for δ Librae (delta Librae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.92

Class Main-sequence

Absolute magnitude 0.07

Spectral Type B9V

Color Index (B-V) 0

Temperature 10125K

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

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

Star System Properties

δ Librae 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 δ Librae double sysyem:

Main star magnitude 4.92

Secondary star magnitude 11.32

Magnitude difference 6.4

Separation 106.3 arcsec

Distance, Radial Speed, Proper Motion

δ Librae is distant 304.10 light years from the Sun and it is moving towards the Sun at the speed of 39 kilometers per second.

Distance (parsec) 93.28

Distance (light year) 304.10

Radial Speed -39 km/s

Proper Motion RA -0.063 arcsec/y

Proper Motion Dec -0.005"/y

Alternative Designations

Bayer designation δ Librae
(delta Librae)

Flamsteed designation 19 Librae

Henry Draper Catalogue HD132742

SAO Catalogue SAO140270

Hipparcos Catalogue HIP73473

Durchmusterung Catalogue BD-07 3938

FK5 Catalogue 1394

General Catalogue of Variable Stars Del Lib

Visibility from Your Location

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

Azimuth: 98.6° RISE 11:23

Max altitude: 29.9° TRANSIT 16:37

Azimuth: 261.4° SET 21:52

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Libra