τ1 Serpentis (tau1 Serpentis)
τ1 Serpentis is a variable giant star in the constellation of Serpens.
τ1 Serpentis visual magnitude is 5.17. Because of its reltive faintness, τ1 Serpentis 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 Serpentis:
Celestial coordinates and finder chart of τ1 Serpentis
τ1 Serpentis 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 τ1 Serpentis are provided in the following table:
The simplified sky map below shows the position of τ1 Serpentis in the sky:
Visibility of τ1 Serpentis from your location
Digitized Sky Survey image of τ1 Serpentis
The image below is a photograph of τ1 Serpentis 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 Serpentis is -0.013 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ1 Serpentis from the Sun and relative movement
τ1 Serpentis is distant 918.31 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.
Spectral properties of τ1 Serpentis
τ1 Serpentis belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where τ1 Serpentis is situated in the Hertzsprung–Russell diagram.