τ1 Hydri (tau1 Hydri)
τ1 Hydri is a double giant star in the constellation of Hydrus.
τ1 Hydri visual magnitude is 6.33. Because of its reltive faintness, τ1 Hydri 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 Hydri:
Celestial coordinates and finder chart of τ1 Hydri
τ1 Hydri is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of τ1 Hydri are provided in the following table:
The simplified sky map below shows the position of τ1 Hydri in the sky:
Visibility of τ1 Hydri from your location
τ1 Hydri (tau1 Hydri) is currently not visible from Greenwich, United Kingdom [change]
Digitized Sky Survey image of τ1 Hydri
The image below is a photograph of τ1 Hydri 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 Hydri is 0.052 arcsec per year in Right Ascension and 0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ1 Hydri from the Sun and relative movement
τ1 Hydri is distant 394.67 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.
Spectral properties of τ1 Hydri
τ1 Hydri belongs to spectral class G6 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where τ1 Hydri is situated in the Hertzsprung–Russell diagram.
τ1 Hydri star system properties
τ1 Hydri 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 τ1 Hydri double sysyem: