Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

α1 Librae (alpha1 Librae)

α1 Librae is a multiple sub-giant star in the constellation of Libra.

α1 Librae visual magnitude is 5.15. Because of its reltive faintness, α1 Librae should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about α1 Librae:

5.15
Sub-giant
α1 Librae (alpha1 Librae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 22°.

Celestial coordinates and finder chart of α1 Librae

α1 Librae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of α1 Librae are provided in the following table:

14h 50m 41s
-15° 59’ 49”
340.31°
38.07°
Libra

The simplified sky map below shows the position of α1 Librae in the sky:

Finder chart α1 Librae (alpha1 Librae) star
Simplified finder chart for α1 Librae (alpha1 Librae).

Visibility of α1 Librae from your location

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

Today's α1 Librae (alpha1 Librae) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 106.0°
Max altitude: 22.5°
Azimuth: 254.0°
α1 Librae (alpha1 Librae) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of α1 Librae

The image below is a photograph of α1 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 α1 Librae is -0.098 arcsec per year in Right Ascension and -0.066 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of α1 Librae (alpha1 Librae) star
DSS2 image of α1 Librae. The red arrow shows the motion of α1 Librae during the next 1000 years (-1.63 arcmin in Right Ascension and -1.10 arcmin in declination);

Distance of α1 Librae from the Sun and relative movement

α1 Librae is distant 77.14 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

23.66 pc
77.14 ly
-23 km/s
-0.098 arcsec/year
-0.066 arcsec/year

Spectral properties of α1 Librae

α1 Librae belongs to spectral class F4 and has a luminosity class of IV corresponding to a sub-giant star.

3.28
F4IV
6827K

The red dot in the diagram below shows where α1 Librae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of α1 Librae. Attribution: Richard Powell / CC BY-SA

α1 Librae star system properties

α1 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 α1 Librae double sysyem:

5.15
5.55
0.4
0 arcsec

Alternative designations of α1 Librae

α1 Librae
(alpha1 Librae)
SAO158836
SAO158836
Gl 563.4