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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 » 

Brachium - σ Librae (sigma Librae)

Below the horizon.  Rise: 16:17 | Tran: 19:49 | Set: 23:22
Alt: -41.83°   Az: 78.41°   Direction: East-North-East

Brachium, also designated as σ Librae (sigma Librae), is a variable giant star of spectral class M3 in the constellation of Libra.

Brachium visual magnitude is 3.29. Because of its moderate brightness, Brachium 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 Brachium - σ Librae (sigma Librae) star
DSS2 image of Brachium. The red arrow shows the motion of Brachium during the next 10000 years (-12.17 arcmin in Right Ascension and -7.17 arcmin in declination);

Celestial Coordinates


15h 05m 30s
-25° 22’ 35”
15h 35m 33s
06h 41m 04s


15h 04m 04s
-25° 16’ 54”

Galactic Coordinates


Finder Chart

Finder chart Brachium - σ Librae (sigma Librae) star
Simplified finder chart for Brachium - σ Librae (sigma Librae).

Magnitude, Color, Spectral Class



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

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

Distance, Radial Speed, Proper Motion

Brachium is distant 291.85 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

-4 km/s
-0.073 arcsec/y

Alternative Designations

σ Librae
(sigma Librae)

Visibility from Your Location

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

Azimuth: 115.4°
Max altitude: 13.1°
Azimuth: 244.6°