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public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 4:42 
Transit: 12:58 
Sunset: 21:15
sunny   (Daytime)   What's Visible Now?

τ Ceti (tau Ceti)

Above the horizon.  Rise: 4:41 | Tran: 9:15 | Set: 13:49
Altitude: 20.7°   Azimuth: 199.0°   Direction: South-South-West

τ Ceti is a double main-sequence star of spectral class G8 in the constellation of Cetus.

τ Ceti visual magnitude is 3.5. Because of its moderate brightness, τ Ceti is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Celestial coordinates and finder chart of τ Ceti

Finder chart τ Ceti (tau Ceti) star
Simplified finder chart for τ Ceti (tau Ceti).

τ Ceti 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 Ceti are provided in the following table:

01h 44m 04s
-15° 56’ 14”
173.19°
-73.43°
Cetus
Image of τ Ceti (tau Ceti) star
DSS2 image of τ Ceti. The red arrow shows the motion of τ Ceti during the next 100 years (-2.86 arcmin in Right Ascension and 1.43 arcmin in declination);

Key facts about τ Ceti

3.5
Main-sequence

and has a luminosity class of V corresponding to a main-sequence star.

5.69
G8V
5534K

The red dot in the diagram below shows where τ Ceti is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ Ceti. Attribution: Richard Powell / CC BY-SA

τ Ceti star system properties

τ Ceti 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 Ceti double sysyem:

3.5
13
9.5
89.8 arcsec

Distance of τ Ceti from the Sun and relative movement

τ Ceti is distant 11.89 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

3.65 pc
11.89 ly
-16 km/s
-1.718 arcsec/year
0.856 arcsec/year

Alternative designations of τ Ceti

τ Ceti
(tau Ceti)
SAO147986
SAO147986

Visibility of τ Ceti from your location

Today's τ Ceti (tau Ceti) rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 105.9°
Max altitude: 22.6°
Azimuth: 254.1°