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public LocationGreenwich, UK
Sunrise: 5:01 
Transit: 13:04 
Sunset: 21:06
sunny   (Daytime)   What's Visible Now?
All Constellations » Cetus » 

η Ceti (eta Ceti)

Above the horizon.  Rise: 1:24 | Tran: 6:31 | Set: 11:38
Alt: 0.29°   Az: 253.34°   Direction: West-South-West

η Ceti is a double giant star of spectral class K1 in the constellation of Cetus.

η Ceti visual magnitude is 3.45. Because of its moderate brightness, η 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.

η 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.

Image of η Ceti (eta Ceti) star
DSS2 image of η Ceti. The red arrow shows the motion of η Ceti during the next 1000 years (3.63 arcmin in Right Ascension and -2.30 arcmin in declination);

Celestial Coordinates


01h 09m 49s
-10° 03’ 06”
05h 06m 35s
06h 16m 24s


01h 08m 35s
-10° 10’ 55”

Galactic Coordinates


Finder Chart

Finder chart η Ceti (eta Ceti) star
Simplified finder chart for η Ceti (eta Ceti).

Magnitude, Color, Spectral Class



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

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

Star System Properties

η 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 η Ceti double sysyem:

233.5 arcsec

Distance, Radial Speed, Proper Motion

η Ceti is distant 117.56 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

36.06 pc
117.56 ly
12 km/s
0.218 arcsec/y
-0.138 "/y

Alternative Designations

η Ceti
(eta Ceti)

Visibility from Your Location

Today's η Ceti (eta Ceti) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 100.1°
Max altitude: 28.5°
Azimuth: 259.9°