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public LocationGreenwich, UK
Sunrise: 5:11 
Transit: 13:06 
Sunset: 21:00
sunny   (Daytime)   What's Visible Now?
All Constellations » Eridanus » 

30 Eridani

Above the horizon.  Rise: 3:20 | Tran: 8:51 | Set: 14:23
Alt: 33.22°   Az: 181.40°   Direction: South

30 Eridani is a double main-sequence star of spectral class B8 in the constellation of Eridanus.

30 Eridani visual magnitude is 5.48. Because of its faintness, 30 Eridani 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.

Image of 30 Eridani star
DSS2 image of 30 Eridani. The red arrow shows the motion of 30 Eridani during the next 10000 years (-1.83 arcmin in Right Ascension and -1.83 arcmin in declination);

Celestial Coordinates


03h 53m 54s
-05° 17’ 22”
00h 04m 42s
03h 58m 36s


03h 52m 41s
-05° 21’ 41”

Galactic Coordinates


Finder Chart

Finder chart 30 Eridani star
Simplified finder chart for 30 Eridani.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where 30 Eridani is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 30 Eridani. Attribution: Richard Powell / CC BY-SA

Star System Properties

30 Eridani 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 30 Eridani double sysyem:

8.3 arcsec

Distance, Radial Speed, Proper Motion

30 Eridani is distant 502.31 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

15 km/s
-0.011 arcsec/y

Alternative Designations


Visibility from Your Location

Today's 30 Eridani rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 95.3°
Max altitude: 33.2°
Azimuth: 264.7°