τ Leonis (tau Leonis)
τ Leonis is a multiple giant star in the constellation of Leo.
τ Leonis visual magnitude is 4.95. Because of its moderate brightness, τ Leonis 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 τ Leonis:
Celestial coordinates and finder chart of τ Leonis
τ Leonis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of τ Leonis are provided in the following table:
The simplified sky map below shows the position of τ Leonis in the sky:
Visibility of τ Leonis from your location
Digitized Sky Survey image of τ Leonis
The image below is a photograph of τ Leonis 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 τ Leonis is 0.018 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ Leonis from the Sun and relative movement
τ Leonis is distant 620.95 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.
Spectral properties of τ Leonis
τ Leonis belongs to spectral class G7 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where τ Leonis is situated in the Hertzsprung–Russell diagram.
τ Leonis star system properties
τ Leonis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the τ Leonis double sysyem: