39 Ceti

Below the horizon. Rise: 20:53 | Tran: 2:43 | Set: 8:29

Alt: -40.63° Az: 352.13° Direction: North

39 Ceti is a variable and double giant star of spectral class G5 in the constellation of Cetus.

39 Ceti visual magnitude is 5.41. Because of its faintness, 39 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 39 Ceti. The red arrow shows the motion of 39 Ceti during the next 1000 years (-1.73 arcmin in Right Ascension and -1.05 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 01h 17m 51s

Declination -02° 22’ 13”

Hour Angle 11h 36m 06s

Sideral Time 12h 53m 58s

J2000

Right Ascension 01h 16m 36s

Declination -02° 30’ 01”

Galactic Coordinates

Galactic Longitude 137.75°

Galactic Latitude -64.64°

Finder Chart

Simplified finder chart for 39 Ceti.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.41

Class Giant

Absolute magnitude 0.94

Spectral Type G5III

Color Index (B-V) 0.9

Temperature 4996K

The red dot in the diagram below shows where 39 Ceti is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 39 Ceti. Attribution: Richard Powell / CC BY-SA

Star System Properties

39 Ceti is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 39 Ceti double sysyem:

Main star magnitude 5.41

Secondary star magnitude 11.11

Magnitude difference 5.7

Separation 177.6 arcsec

Distance, Radial Speed, Proper Motion

39 Ceti is distant 255.89 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

Distance (parsec) 78.49

Distance (light year) 255.89

Radial Speed -20 km/s

Proper Motion RA -0.104 arcsec/y

Proper Motion Dec -0.063"/y

Alternative Designations

Flamsteed designation 39 Ceti

Henry Draper Catalogue HD7672

SAO Catalogue SAO129204

Hipparcos Catalogue HIP5951

Durchmusterung Catalogue BD-03 172

General Catalogue of Variable Stars AY Cet

Visibility from Your Location

Today's 39 Ceti rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 92.4° RISE 20:53

Max altitude: 36.1° TRANSIT 2:43

Azimuth: 267.6° SET 8:29

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Cetus