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public LocationGreenwich, UK
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
sunny   (Daytime)   What's Visible Now?
All Constellations » Libra » 

τ Librae (tau Librae)

Below the horizon.  Rise: 17:29 | Tran: 20:24 | Set: 23:18
Alt: -57.38°   Az: 61.30°   Direction: East-North-East

τ Librae is a main-sequence star of spectral class B2 in the constellation of Libra.

τ Librae visual magnitude is 3.66. Because of its moderate brightness, τ 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.

Image of τ Librae (tau Librae) star
DSS2 image of τ Librae. The red arrow shows the motion of τ Librae during the next 10000 years (-2.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates


15h 40m 10s
-29° 51’ 23”
14h 12m 08s
05h 52m 18s


15h 38m 39s
-29° 46’ 40”

Galactic Coordinates


Finder Chart

Finder chart τ Librae (tau Librae) star
Simplified finder chart for τ Librae (tau Librae).

Magnitude, Color, Spectral Class



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

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

Distance, Radial Speed, Proper Motion

τ Librae is distant 444.75 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

3 km/s
-0.015 arcsec/y

Alternative Designations

τ Librae
(tau Librae)

Visibility from Your Location

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

Azimuth: 119.9°
Max altitude: 8.7°
Azimuth: 240.1°