τ1 Gruis (tau1 Gruis)

τ1 Gruis is a hypergiant star in the constellation of Grus.

τ1 Gruis visual magnitude is 6.04. Because of its reltive faintness, τ1 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 τ1 Gruis:

Celestial coordinates and finder chart of τ1 Gruis

τ1 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 τ1 Gruis are provided in the following table:

The simplified sky map below shows the position of τ1 Gruis in the sky:

Visibility of τ1 Gruis from your location

τ1 Gruis (tau1 Gruis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of τ1 Gruis

The image below is a photograph of τ1 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 τ1 Gruis is 0.216 arcsec per year in Right Ascension and -0.078 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Distance of τ1 Gruis from the Sun and relative movement

τ1 Gruis is distant 108.52 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Spectral properties of τ1 Gruis

τ1 Gruis belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.

The red dot in the diagram below shows where τ1 Gruis is situated in the Hertzsprung–Russell diagram.

Alternative designations of τ1 Gruis