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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
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All Constellations » Lupus » 

τ2 Lupi (tau2 Lupi)

Altitude: -23.4°   Azimuth: 134.5°   Direction: South-East

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:


τ2 Lupi (tau2 Lupi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -23.4°
Azimuth: 134.5°
Direction: South-East

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:

14h 26m 10s
-45° 22’ 45”

The simplified sky map below shows the position of τ2 Lupi in the sky:

Finder chart τ2 Lupi (tau2 Lupi) star
Simplified finder chart for τ2 Lupi (tau2 Lupi).

Visibility of τ2 Lupi from your location

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

τ2 Lupi (tau2 Lupi) is currently not visible from Greenwich, United Kingdom edit_location_alt

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.

Image of τ2 Lupi (tau2 Lupi) star
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);

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.

96.34 pc
314.07 ly
-1 km/s
0.016 arcsec/year
-0.008 arcsec/year

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.

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

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:

0.1 arcsec

Alternative designations of τ2 Lupi

τ2 Lupi
(tau2 Lupi)