ε Librae (epsilon Librae)

Altitude: 1.9° Azimuth: 109.2° Direction: East-South-East

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

ε Librae visual magnitude is 4.94. Because of its moderate brightness, ε 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 ε Librae:

Color of ε Librae ⬤

Magnitude of ε Librae 4.94

Class Sub-giant

VISIBILITY RIGHT NOW

ε Librae (epsilon Librae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 1.9°
Azimuth: 109.2°
Direction: East-South-East

Celestial coordinates and finder chart of ε Librae

ε 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 ε Librae are provided in the following table:

Right Ascension J2000 15h 24m 11s

Declination J2000 -10° 19’ 19”

Galactic Longitude 352.84°

Galactic Latitude 37.34°

Constellation Libra

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

Finder chart ε Librae (epsilon Librae) star

Simplified finder chart for ε Librae (epsilon Librae).

Visibility of ε 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 ε Librae (epsilon 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: 100.3° RISE 5:22

Max altitude: 28.2° TRANSIT 10:28

Azimuth: 259.7° SET 15:33

Digitized Sky Survey image of ε Librae

The image below is a photograph of ε 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 ε Librae is -0.067 arcsec per year in Right Ascension and -0.154 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of ε Librae. The red arrow shows the motion of ε Librae during the next 1000 years (-1.12 arcmin in Right Ascension and -2.57 arcmin in declination);

Distance of ε Librae from the Sun and relative movement

ε Librae is distant 105.50 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 32.36 pc

Distance (light year) 105.50 ly

Heliocentric radial velocity -10 km/s

Proper Motion RA -0.067 arcsec/year

Proper Motion Dec -0.154 arcsec/year

Spectral properties of ε Librae

ε Librae belongs to spectral class F5 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude 2.39

Spectral Type F5IV

Color Index (B-V) 0.44

Temperature of ε Librae 6674K

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

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

Alternative designations of ε Librae

Bayer designation ε Librae
(epsilon Librae)

Flamsteed designation 31 Librae

Henry Draper Catalogue HD137052

SAO Catalogue SAO159234

Hipparcos Catalogue HIP75379

Durchmusterung Catalogue BD-09 4138

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