δ Lupi (delta Lupi)

δ Lupi is a variable sub-giant star in the constellation of Lupus.

δ Lupi visual magnitude is 3.22. Because of its moderate brightness, δ 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 δ Lupi:

Color of δ Lupi ⬤

Magnitude of δ Lupi 3.22

Class Sub-giant

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

Celestial coordinates and finder chart of δ Lupi

δ 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 δ Lupi are provided in the following table:

Right Ascension J2000 15h 21m 22s

Declination J2000 -40° 38’ 51”

Galactic Longitude 331.32°

Galactic Latitude 13.82°

Constellation Lupus

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

Simplified finder chart for δ Lupi (delta Lupi).

Visibility of δ Lupi from your location

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

δ Lupi (delta Lupi) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of δ Lupi

The image below is a photograph of δ 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 δ Lupi is -0.015 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of δ Lupi. The red arrow shows the motion of δ Lupi during the next 10000 years (-2.50 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of δ Lupi from the Sun and relative movement

δ Lupi is distant 510.17 light years from the Sun

Distance (parsec) 156.49 pc

Distance (light year) 510.17 ly

Proper Motion RA -0.015 arcsec/year

Proper Motion Dec -0.026 arcsec/year

Spectral properties of δ Lupi

δ Lupi belongs to spectral class B1 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -2.75

Spectral Type B1IV

Color Index (B-V) -0.22

Temperature of δ Lupi 14087K

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

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

Alternative designations of δ Lupi

Bayer designation δ Lupi
(delta Lupi)

Henry Draper Catalogue HD136298

SAO Catalogue SAO225691

Hipparcos Catalogue HIP75141

Durchmusterung Catalogue CD-40 9538

FK5 Catalogue 1402

General Catalogue of Variable Stars Del Lup

In Evidence

Other stars in Lupus