ε Lupi (epsilon Lupi)

Altitude: -10.5° Azimuth: 156.4° Direction: South-South-East

ε Lupi is a variable and multiple sub-giant star in the constellation of Lupus.

ε Lupi visual magnitude is 3.37. Because of its moderate brightness, ε Lupi 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 Lupi:

Color of ε Lupi ⬤

Magnitude of ε Lupi 3.37

Class Sub-giant

VISIBILITY RIGHT NOW

ε Lupi (epsilon Lupi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -10.5°
Azimuth: 156.4°
Direction: South-South-East

Celestial coordinates and finder chart of ε Lupi

ε Lupi 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 ε Lupi are provided in the following table:

Right Ascension J2000 15h 22m 40s

Declination J2000 -44° 41’ 21”

Galactic Longitude 329.23°

Galactic Latitude 10.32°

Constellation Lupus

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

Simplified finder chart for ε Lupi (epsilon Lupi).

Visibility of ε Lupi from your location

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

ε Lupi (epsilon Lupi) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of ε Lupi

The image below is a photograph of ε Lupi 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 Lupi is -0.019 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ε Lupi. The red arrow shows the motion of ε Lupi during the next 10000 years (-3.17 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of ε Lupi from the Sun and relative movement

ε Lupi is distant 503.86 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 154.56 pc

Distance (light year) 503.86 ly

Heliocentric radial velocity 8 km/s

Proper Motion RA -0.019 arcsec/year

Proper Motion Dec -0.013 arcsec/year

Spectral properties of ε Lupi

ε Lupi belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -2.58

Spectral Type B2IV

Color Index (B-V) -0.18

Temperature of ε Lupi 13121K

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

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

ε Lupi star system properties

ε Lupi 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 ε Lupi double sysyem:

Main star magnitude 3.37

Secondary star magnitude 4.87

Magnitude difference 1.5

Separation 0.4 arcsec

Alternative designations of ε Lupi

Bayer designation ε Lupi
(epsilon Lupi)

Henry Draper Catalogue HD136504

SAO Catalogue SAO225712

Hipparcos Catalogue HIP75264

Durchmusterung Catalogue CD-4410066

General Catalogue of Variable Stars Var?

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Other stars in Lupus