σ Lupi (sigma Lupi)

σ Lupi is a giant star in the constellation of Lupus.

σ Lupi visual magnitude is 4.42. Because of its moderate brightness, σ 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 σ Lupi:

Color of σ Lupi ⬤

Magnitude of σ Lupi 4.42

Class Giant

VISIBILITY RIGHT NOW σ Lupi (sigma Lupi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of σ Lupi

σ 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 σ Lupi are provided in the following table:

Right Ascension J2000 14h 32m 36s

Declination J2000 -50° 27’ 24”

Galactic Longitude 318.93°

Galactic Latitude 9.25°

Constellation Lupus

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

Simplified finder chart for σ Lupi (sigma Lupi).

Visibility of σ Lupi from your location

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

σ Lupi (sigma Lupi) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of σ Lupi

The image below is a photograph of σ 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 σ Lupi is -0.043 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of σ Lupi. The red arrow shows the motion of σ Lupi during the next 10000 years (-7.17 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of σ Lupi from the Sun and relative movement

σ Lupi is distant 573.94 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

Distance (parsec) 176.06 pc

Distance (light year) 573.94 ly

Heliocentric radial velocity -2 km/s

Proper Motion RA -0.043 arcsec/year

Proper Motion Dec -0.01 arcsec/year

Spectral properties of σ Lupi

σ Lupi belongs to spectral class B2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.81

Spectral Type B2III

Color Index (B-V) -0.19

Temperature of σ Lupi 13348K

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

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

Alternative designations of σ Lupi

Bayer designation σ Lupi
(sigma Lupi)

Henry Draper Catalogue HD127381

SAO Catalogue SAO241781

Hipparcos Catalogue HIP71121

Durchmusterung Catalogue CD-49 8831

In Evidence

Other stars in Lupus