η Ceti (eta Ceti)

Above the horizon. Rise: 5:17 | Tran: 10:24 | Set: 15:31

Alt: 26.87° Az: 161.89° Direction: South-South-East

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.

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

Apparent

Right Ascension 01h 09m 51s

Declination -10° 02’ 50”

Hour Angle 22h 54m 34s

Sidereal Time 00h 04m 26s

J2000

Right Ascension 01h 08m 35s

Declination -10° 10’ 55”

Galactic Coordinates

Galactic Longitude 137.15°

Galactic Latitude -72.58°

Finder Chart

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Finder chart for η Ceti (eta Ceti).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.45

Class Giant

Absolute magnitude 0.66

Spectral Type K1III

Color Index (B-V) 1.16

Temperature 4389K

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

Main star magnitude 3.45

Secondary star magnitude 10.15

Magnitude difference 6.7

Separation 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.

Distance (parsec) 36.06

Distance (light year) 117.56

Radial Speed 12 km/s

Proper Motion RA 0.218 arcsec/y

Proper Motion Dec -0.138"/y

Alternative Designations

Bayer designation η Ceti
(eta Ceti)

Flamsteed designation 31 Ceti

Henry Draper Catalogue HD6805

SAO Catalogue SAO147632

Hipparcos Catalogue HIP5364

Durchmusterung Catalogue BD-10 240

Gliese Catalogue NN 3075

FK5 Catalogue 40

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: 100.0° RISE 5:17

Max altitude: 28.5° TRANSIT 10:24

Azimuth: 260.0° SET 15:31

In Evidence

Other stars in Cetus

η Ceti (eta Ceti)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Cetus

η Ceti (eta Ceti)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location