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

δ Librae (delta Librae)

δ Librae is a variable and multiple main-sequence star in the constellation of Libra.

δ Librae visual magnitude is 4.92. Because of its moderate brightness, δ 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 δ Librae:

4.92
Main-sequence
δ Librae (delta Librae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 30°.

Celestial coordinates and finder chart of δ Librae

δ 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 δ Librae are provided in the following table:

15h 00m 58s
-08° 31’ 08”
348.87°
42.51°
Libra

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

Finder chart δ Librae (delta Librae) star
Simplified finder chart for δ Librae (delta Librae).

Visibility of δ Librae from your location

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

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

Azimuth: 98.5°
Max altitude: 30.0°
Azimuth: 261.5°
δ Librae (delta Librae) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of δ Librae

The image below is a photograph of δ 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 δ Librae is -0.063 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of δ Librae (delta Librae) star
DSS2 image of δ Librae. The red arrow shows the motion of δ Librae during the next 10000 years (-10.50 arcmin in Right Ascension and -0.83 arcmin in declination);

Distance of δ Librae from the Sun and relative movement

δ Librae is distant 304.10 light years from the Sun and it is moving towards the Sun at the speed of 39 kilometers per second.

93.28 pc
304.10 ly
-39 km/s
-0.063 arcsec/year
-0.005 arcsec/year

Spectral properties of δ Librae

δ Librae belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

0.07
B9V
10125K

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

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

δ Librae star system properties

δ 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 δ Librae double sysyem:

4.92
11.32
6.4
106.3 arcsec

Alternative designations of δ Librae

δ Librae
(delta Librae)
SAO140270
SAO140270