τ2 Lupi (tau2 Lupi)
τ2 Lupi is a double sub-giant star in the constellation of Lupus.
τ2 Lupi visual magnitude is 4.35. Because of its moderate brightness, τ2 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 τ2 Lupi:
Celestial coordinates and finder chart of τ2 Lupi
τ2 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 τ2 Lupi are provided in the following table:
The simplified sky map below shows the position of τ2 Lupi in the sky:
Visibility of τ2 Lupi from your location
Digitized Sky Survey image of τ2 Lupi
The image below is a photograph of τ2 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 τ2 Lupi is 0.016 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ2 Lupi from the Sun and relative movement
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.
Spectral properties of τ2 Lupi
τ2 Lupi belongs to spectral class F4 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where τ2 Lupi is situated in the Hertzsprung–Russell diagram.
τ2 Lupi 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: