τ2 Lupi (tau2 Lupi)

Below the horizon. Never rises today

Alt: -24.72° Az: 133.02° Direction: South-East

τ2 Lupi is a double sub-giant star of spectral class F4 in the constellation of Lupus.

τ2 Lupi visual magnitude is 4.35. Because of its moderate brightness, τ2 Lupi is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of τ2 Lupi. The red arrow shows the motion of τ2 Lupi during the next 10000 years (2.67 arcmin in Right Ascension and -1.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 27m 49s

Declination -45° 29’ 33”

Hour Angle 19h 14m 40s

Sidereal Time 09h 42m 29s

J2000

Right Ascension 14h 26m 10s

Declination -45° 22’ 45”

Galactic Coordinates

Galactic Longitude 319.87°

Galactic Latitude 14.35°

Finder Chart

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Finder chart for τ2 Lupi (tau2 Lupi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.35

Class Sub-giant

Absolute magnitude -0.57

Spectral Type F4IV

Color Index (B-V) 0.43

Temperature 6724K

The red dot in the diagram below shows where τ2 Lupi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ2 Lupi. Attribution: Richard Powell / CC BY-SA

Star System Properties

τ2 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 τ2 Lupi double sysyem:

Main star magnitude 4.35

Secondary star magnitude 4.45

Magnitude difference 0.1

Separation 0.1 arcsec

Distance, Radial Speed, Proper Motion

τ2 Lupi is distant 314.07 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 96.34

Distance (light year) 314.07

Radial Speed -1 km/s

Proper Motion RA 0.016 arcsec/y

Proper Motion Dec -0.008"/y

Alternative Designations

Bayer designation τ2 Lupi
(tau2 Lupi)

Henry Draper Catalogue HD126354

SAO Catalogue SAO224920

Hipparcos Catalogue HIP70576

Durchmusterung Catalogue CD-44 9323

Visibility from Your Location

τ2 Lupi (tau2 Lupi) is currently not visible from Greenwich, UK

Set Location

Other stars in Lupus