81 Ceti

Below the horizon. Rise: 3:50 | Tran: 9:31 | Set: 15:13

Alt: -27.90° Az: 55.87° Direction: South-South-West

81 Ceti is a giant star of spectral class G5 in the constellation of Cetus.

81 Ceti visual magnitude is 5.65. Because of its faintness, 81 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 81 Ceti. The red arrow shows the motion of 81 Ceti during the next 10000 years (6.83 arcmin in Right Ascension and -7.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 38m 58s

Declination -03° 17’ 12”

Hour Angle 15h 08m 29s

Sidereal Time 17h 47m 28s

J2000

Right Ascension 02h 37m 41s

Declination -03° 23’ 45”

Galactic Coordinates

Galactic Longitude 174.49°

Galactic Latitude -55.25°

Finder Chart

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Finder chart for 81 Ceti.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.65

Class Giant

Absolute magnitude 0.71

Spectral Type G5

Color Index (B-V) 1.02

Temperature 4695K

The red dot in the diagram below shows where 81 Ceti is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 81 Ceti. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

81 Ceti is distant 316.81 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 97.18

Distance (light year) 316.81

Radial Speed 8 km/s

Proper Motion RA 0.041 arcsec/y

Proper Motion Dec -0.045"/y

Alternative Designations

Flamsteed designation 81 Ceti

Henry Draper Catalogue HD16400

SAO Catalogue SAO130026

Hipparcos Catalogue HIP12247

Durchmusterung Catalogue BD-04 436

FK5 Catalogue 2180

Visibility from Your Location

Today's 81 Ceti rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 93.3° RISE 3:50

Max altitude: 35.2° TRANSIT 9:31

Azimuth: 266.7° SET 15:13

Set Location

Other stars in Cetus