τ Cassiopeiae (tau Cassiopeiae)
τ Cassiopeiae is a variable giant star in the constellation of Cassiopeia.
τ Cassiopeiae visual magnitude is 4.87. Because of its moderate brightness, τ Cassiopeiae 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 Cassiopeiae:
Celestial coordinates and finder chart of τ Cassiopeiae
τ Cassiopeiae 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 Cassiopeiae are provided in the following table:
The simplified sky map below shows the position of τ Cassiopeiae in the sky:
Visibility of τ Cassiopeiae from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
τ Cassiopeiae (tau Cassiopeiae) is circumpolar and transits at 14:37 UTC (altitude: 82.8°)
Digitized Sky Survey image of τ Cassiopeiae
The image below is a photograph of τ Cassiopeiae 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 Cassiopeiae is 0.061 arcsec per year in Right Ascension and 0.057 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ Cassiopeiae from the Sun and relative movement
τ Cassiopeiae is distant 172.67 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.
Spectral properties of τ Cassiopeiae
τ Cassiopeiae 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 Cassiopeiae is situated in the Hertzsprung–Russell diagram.
