τ Coronae Borealis (tau Coronae Borealis)
τ Coronae Borealis is a variable and double giant star in the constellation of Corona Borealis.
τ Coronae Borealis visual magnitude is 4.76. Because of its moderate brightness, τ Coronae Borealis 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 Coronae Borealis:
Celestial coordinates and finder chart of τ Coronae Borealis
τ Coronae Borealis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of τ Coronae Borealis are provided in the following table:
The simplified sky map below shows the position of τ Coronae Borealis in the sky:
Visibility of τ Coronae Borealis from your location
Today's τ Coronae Borealis (tau Coronae Borealis) rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Digitized Sky Survey image of τ Coronae Borealis
The image below is a photograph of τ Coronae Borealis 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 Coronae Borealis is -0.053 arcsec per year in Right Ascension and 0.333 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of τ Coronae Borealis from the Sun and relative movement
τ Coronae Borealis is distant 113.04 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.
Spectral properties of τ Coronae Borealis
τ Coronae Borealis belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where τ Coronae Borealis is situated in the Hertzsprung–Russell diagram.
τ Coronae Borealis star system properties
τ Coronae Borealis 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 τ Coronae Borealis double sysyem: