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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
All Constellations » Libra » 

υ Librae (upsilon Librae)

Altitude: -45.1°   Azimuth: 280.9°   Direction: West

υ Librae is a double giant star in the constellation of Libra.

υ Librae visual magnitude is 3.58. Because of its moderate brightness, υ Librae should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about υ Librae:


υ Librae (upsilon Librae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -45.1°
Azimuth: 280.9°
Direction: West

Celestial coordinates and finder chart of υ Librae

υ Librae is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of υ Librae are provided in the following table:

15h 37m 01s
-28° 08’ 06”

The simplified sky map below shows the position of υ Librae in the sky:

Finder chart υ Librae (upsilon Librae) star
Simplified finder chart for υ Librae (upsilon Librae).

Visibility of υ Librae from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's υ Librae (upsilon Librae) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 118.1°
Max altitude: 10.4°
Azimuth: 241.9°

Digitized Sky Survey image of υ Librae

The image below is a photograph of υ Librae from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of υ Librae is -0.009 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of υ Librae (upsilon Librae) star
DSS2 image of υ Librae. The red arrow shows the motion of υ Librae during the next 100000 years (-15.00 arcmin in Right Ascension and 5.00 arcmin in declination);

Distance of υ Librae from the Sun and relative movement

υ Librae is distant 194.51 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

59.67 pc
194.51 ly
-25 km/s
-0.009 arcsec/year
0.003 arcsec/year

Spectral properties of υ Librae

υ Librae belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


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

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

υ Librae star system properties

υ 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 υ Librae double sysyem:

3.5 arcsec

Alternative designations of υ Librae

υ Librae
(upsilon Librae)