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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Eridanus » 

25 Eridani

Altitude: -1.8°   Azimuth: 271.8°   Direction: West

25 Eridani is a giant star in the constellation of Eridanus.

25 Eridani visual magnitude is 5.55. Because of its reltive faintness, 25 Eridani 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 25 Eridani:


25 Eridani is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.8°
Azimuth: 271.8°
Direction: West

Celestial coordinates and finder chart of 25 Eridani

25 Eridani 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 25 Eridani are provided in the following table:

03h 44m 56s
-00° 17’ 48”

The simplified sky map below shows the position of 25 Eridani in the sky:

Finder chart 25 Eridani star
Simplified finder chart for 25 Eridani.

Visibility of 25 Eridani from your location

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

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

Azimuth: 90.3°
Max altitude: 38.2°
Azimuth: 269.7°

Digitized Sky Survey image of 25 Eridani

The image below is a photograph of 25 Eridani 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 25 Eridani is 0.057 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 25 Eridani star
DSS2 image of 25 Eridani. The red arrow shows the motion of 25 Eridani during the next 10000 years (9.50 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of 25 Eridani from the Sun and relative movement

25 Eridani is distant 351.29 light years from the Sun and it is moving far from the Sun at the speed of 71 kilometers per second.

107.76 pc
351.29 ly
71 km/s
0.057 arcsec/year
-0.001 arcsec/year

Spectral properties of 25 Eridani

25 Eridani belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of 25 Eridani