18 Ceti

Below the horizon. Rise: 4:25 | Tran: 9:18 | Set: 14:10

Alt: -43.03° Az: 313.49° Direction: North-West

18 Ceti is a double hypergiant star of spectral class G0 in the constellation of Cetus.

18 Ceti visual magnitude is 6.15. Because of its faintness, 18 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 18 Ceti. The red arrow shows the motion of 18 Ceti during the next 1000 years (-0.57 arcmin in Right Ascension and -3.35 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 00h 46m 45s

Declination -12° 44’ 32”

Hour Angle 09h 48m 15s

Sidereal Time 10h 35m 00s

J2000

Right Ascension 00h 45m 28s

Declination -12° 52’ 50”

Galactic Coordinates

Galactic Longitude 117.05°

Galactic Latitude -75.68°

Finder Chart

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Finder chart for 18 Ceti.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.15

Class Hypergiant

Absolute magnitude 3.63

Spectral Type G0V

Color Index (B-V) 0.61

Temperature 5929K

The red dot in the diagram below shows where 18 Ceti is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 18 Ceti. Attribution: Richard Powell / CC BY-SA

Star System Properties

18 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 18 Ceti double sysyem:

Main star magnitude 6.15

Secondary star magnitude 12.45

Magnitude difference 6.3

Separation 69.5 arcsec

Distance, Radial Speed, Proper Motion

18 Ceti is distant 103.85 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 31.86

Distance (light year) 103.85

Radial Speed -13 km/s

Proper Motion RA -0.034 arcsec/y

Proper Motion Dec -0.201"/y

Alternative Designations

Flamsteed designation 18 Ceti

Henry Draper Catalogue HD4307

SAO Catalogue SAO147432

Hipparcos Catalogue HIP3559

Durchmusterung Catalogue BD-13 128

Gliese Catalogue GJ 1020

Visibility from Your Location

Today's 18 Ceti rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.7° RISE 4:25

Max altitude: 25.8° TRANSIT 9:18

Azimuth: 257.3° SET 14:10

Set Location

Other stars in Cetus