Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
sunny DaytimeWhat's Visible Now
All Constellations » Grus » 

τ3 Gruis (tau3 Gruis)

Altitude: -9.5°   Azimuth: 177.0°   Direction: South

τ3 Gruis is a star in the constellation of Grus.

τ3 Gruis visual magnitude is 5.7. Because of its reltive faintness, τ3 Gruis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about τ3 Gruis:


τ3 Gruis (tau3 Gruis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -9.5°
Azimuth: 177.0°
Direction: South

Celestial coordinates and finder chart of τ3 Gruis

τ3 Gruis 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 τ3 Gruis are provided in the following table:

22h 56m 47s
-47° 58’ 09”

The simplified sky map below shows the position of τ3 Gruis in the sky:

Finder chart τ3 Gruis (tau3 Gruis) star
Simplified finder chart for τ3 Gruis (tau3 Gruis).

Visibility of τ3 Gruis from your location

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

τ3 Gruis (tau3 Gruis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of τ3 Gruis

The image below is a photograph of τ3 Gruis 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 τ3 Gruis is -0.028 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of τ3 Gruis (tau3 Gruis) star
DSS2 image of τ3 Gruis. The red arrow shows the motion of τ3 Gruis during the next 10000 years (-4.67 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of τ3 Gruis from the Sun and relative movement

τ3 Gruis is distant 272.12 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

83.47 pc
272.12 ly
6 km/s
-0.028 arcsec/year
-0.001 arcsec/year

Spectral properties of τ3 Gruis

τ3 Gruis belongs to spectral class A τ3 Gruis is also a so called metallic star.


The red dot in the diagram below shows where τ3 Gruis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ3 Gruis. Attribution: Richard Powell / CC BY-SA

Alternative designations of τ3 Gruis

τ3 Gruis
(tau3 Gruis)