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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:10 
Transit: 12:56 
Sunset: 20:42
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All Constellations » Eridanus » 

21 Eridani

Above the horizon.  Rise: 7:40 | Tran: 13:10 | Set: 18:40
Alt: 24.61°   Az: 221.76°   Direction: South-West

21 Eridani is a main-sequence star of spectral class K1 in the constellation of Eridanus.

21 Eridani visual magnitude is 5.96. Because of its faintness, 21 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 21 Eridani star
DSS2 image of 21 Eridani. The red arrow shows the motion of 21 Eridani during the next 1000 years (-0.25 arcmin in Right Ascension and -3.42 arcmin in declination);

Celestial Coordinates

Apparent

03h 40m 16s
-05° 32’ 41”
02h 29m 52s
06h 10m 09s

J2000

03h 39m 01s
-05° 37’ 33”

Galactic Coordinates

192.27°
-44.75°

Finder Chart

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Finder chart for 21 Eridani.

Magnitude, Color, Spectral Class

5.96
Main-sequence

3.23
K1V
4943K

The red dot in the diagram below shows where 21 Eridani is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 21 Eridani. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

21 Eridani is distant 114.63 light years from the Sun and it is moving far from the Sun at the speed of 40 kilometers per second.

35.16
114.63
40 km/s
-0.015 arcsec/y
-0.205"/y

Alternative Designations

SAO130634
SAO130634

Visibility from Your Location

Today's 21 Eridani rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 95.5°
Max altitude: 33.0°
Azimuth: 264.5°