θ Lyrae (theta Lyrae)
θ Lyrae is a variable and multiple hypergiant star in the constellation of Lyra.
θ Lyrae visual magnitude is 4.36. Because of its moderate brightness, θ Lyrae 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 θ Lyrae:
Celestial coordinates and finder chart of θ Lyrae
θ Lyrae 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 θ Lyrae are provided in the following table:
The simplified sky map below shows the position of θ Lyrae in the sky:
Visibility of θ Lyrae from your location
Digitized Sky Survey image of θ Lyrae
The image below is a photograph of θ Lyrae 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 θ Lyrae is -0.001 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.
Distance of θ Lyrae from the Sun and relative movement
θ Lyrae is distant 768.87 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.
Spectral properties of θ Lyrae
θ Lyrae belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.
The red dot in the diagram below shows where θ Lyrae is situated in the Hertzsprung–Russell diagram.
θ Lyrae star system properties
θ Lyrae is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the θ Lyrae double sysyem: