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🌎 Location: Greenwich, United Kingdom [change]

77 Ceti

77 Ceti is a double giant star in the constellation of Cetus.

77 Ceti visual magnitude is 5.75. Because of its reltive faintness, 77 Ceti should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 77 Ceti:

5.75
Giant
77 Ceti is above the horizon from Greenwich, United Kingdom [change]. Altitude: 24°.

Celestial coordinates and finder chart of 77 Ceti

77 Ceti is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 77 Ceti are provided in the following table:

02h 34m 42s
-07° 51’ 33”
179.49°
-58.87°
Cetus

The simplified sky map below shows the position of 77 Ceti in the sky:

Finder chart 77 Ceti star
Simplified finder chart for 77 Ceti.

Visibility of 77 Ceti from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 77 Ceti rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 97.9°
Max altitude: 30.7°
Azimuth: 262.1°
77 Ceti is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 77 Ceti

The image below is a photograph of 77 Ceti from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 77 Ceti is 0.063 arcsec per year in Right Ascension and -0.065 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 77 Ceti star
DSS2 image of 77 Ceti. The red arrow shows the motion of 77 Ceti during the next 10000 years (10.50 arcmin in Right Ascension and -10.83 arcmin in declination);

Distance of 77 Ceti from the Sun and relative movement

77 Ceti is distant 548.82 light years from the Sun and it is moving far from the Sun at the speed of 25 kilometers per second.

168.35 pc
548.82 ly
25 km/s
0.063 arcsec/year
-0.065 arcsec/year

Spectral properties of 77 Ceti

77 Ceti belongs to spectral class K4

-0.38
K4
3950K

The red dot in the diagram below shows where 77 Ceti is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 77 Ceti. Attribution: Richard Powell / CC BY-SA

77 Ceti star system properties

77 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 77 Ceti double sysyem:

5.75
12.45
6.7
94.7 arcsec

Alternative designations of 77 Ceti

SAO129984
SAO129984