25 Ceti

Above the horizon. Rise: 4:17 | Tran: 9:51 | Set: 15:25

Alt: 11.95° Az: 113.60° Direction: East-South-East

25 Ceti is a double hypergiant star of spectral class K0 in the constellation of Cetus.

25 Ceti visual magnitude is 5.43. Because of its faintness, 25 Ceti is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 25 Ceti. The red arrow shows the motion of 25 Ceti during the next 1000 years (-1.80 arcmin in Right Ascension and -1.77 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 01h 04m 19s

Declination -04° 42’ 02”

Hour Angle 19h 43m 36s

Sidereal Time 20h 47m 56s

J2000

Right Ascension 01h 03m 02s

Declination -04° 50’ 12”

Galactic Coordinates

Galactic Longitude 130.52°

Galactic Latitude -67.54°

Finder Chart

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Finder chart for 25 Ceti.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.43

Class Hypergiant

Absolute magnitude -0.07

Spectral Type K0III

Color Index (B-V) 1.11

Temperature 4493K

The red dot in the diagram below shows where 25 Ceti is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 25 Ceti. Attribution: Richard Powell / CC BY-SA

Star System Properties

25 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 25 Ceti double sysyem:

Main star magnitude 5.43

Secondary star magnitude 11.83

Magnitude difference 6.4

Separation 99.9 arcsec

Distance, Radial Speed, Proper Motion

25 Ceti is distant 410.06 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

Distance (parsec) 125.79

Distance (light year) 410.06

Radial Speed 15 km/s

Proper Motion RA -0.108 arcsec/y

Proper Motion Dec -0.106"/y

Alternative Designations

Flamsteed designation 25 Ceti

Henry Draper Catalogue HD6203

SAO Catalogue SAO129094

Hipparcos Catalogue HIP4914

Durchmusterung Catalogue BD-05 177

Visibility from Your Location

Today's 25 Ceti rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 94.7° RISE 4:17

Max altitude: 33.8° TRANSIT 9:51

Azimuth: 265.3° SET 15:25

Set Location

Other stars in Cetus