18 Librae

Below the horizon. Rise: 19:31 | Tran: 0:32 | Set: 5:36

Alt: -1.33° Az: 253.50° Direction: West-South-West

18 Librae is a multiple giant star of spectral class K3 in the constellation of Libra.

18 Librae visual magnitude is 5.87. Because of its faintness, 18 Librae is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 18 Librae. The red arrow shows the motion of 18 Librae during the next 1000 years (-1.68 arcmin in Right Ascension and -1.02 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 00m 16s

Declination -11° 14’ 39”

Hour Angle 05h 11m 04s

Sidereal Time 20h 11m 21s

J2000

Right Ascension 14h 58m 53s

Declination -11° 08’ 39”

Galactic Coordinates

Galactic Longitude 346.11°

Galactic Latitude 40.8°

Finder Chart

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Finder chart for 18 Librae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.87

Class Giant

Absolute magnitude 0.94

Spectral Type K3III

Color Index (B-V) 1.26

Temperature 4194K

The red dot in the diagram below shows where 18 Librae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 18 Librae. Attribution: Richard Powell / CC BY-SA

Star System Properties

18 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 18 Librae double sysyem:

Main star magnitude 5.87

Secondary star magnitude 9.67

Magnitude difference 3.8

Separation 19.7 arcsec

Distance, Radial Speed, Proper Motion

18 Librae is distant 315.89 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 96.90

Distance (light year) 315.89

Radial Speed -12 km/s

Proper Motion RA -0.101 arcsec/y

Proper Motion Dec -0.061"/y

Alternative Designations

Flamsteed designation 18 Librae

Henry Draper Catalogue HD132345

SAO Catalogue SAO158946

Hipparcos Catalogue HIP73310

Durchmusterung Catalogue BD-10 3999

Aitken Double Star Catalogue ADS9456

Visibility from Your Location

Today's 18 Librae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 101.2° RISE 19:31

Max altitude: 27.3° TRANSIT 0:32

Azimuth: 258.8° SET 5:36

Set Location

Other stars in Libra