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public LocationGreenwich, UK
Sunrise: 5:00 
Transit: 13:04 
Sunset: 21:07
wb_twilight   (Civil Twilight)   What's Visible Now?
All Constellations » Leo » 

3 Leonis

Above the horizon.  Rise: 8:15 | Tran: 14:54 | Set: 21:33
Alt: 2.56°   Az: 279.78°   Direction: West

3 Leonis is a double hypergiant star of spectral class K0 in the constellation of Leo.

3 Leonis visual magnitude is 5.71. Because of its faintness, 3 Leonis 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.

3 Leonis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of 3 Leonis star
DSS2 image of 3 Leonis. The red arrow shows the motion of 3 Leonis during the next 10000 years (-4.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates


09h 29m 47s
+08° 04’ 48”
06h 24m 19s
15h 54m 07s


09h 28m 29s
+08° 11’ 17”

Galactic Coordinates


Finder Chart

Finder chart 3 Leonis star
Simplified finder chart for 3 Leonis.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where 3 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 3 Leonis. Attribution: Richard Powell / CC BY-SA

Star System Properties

3 Leonis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 3 Leonis double sysyem:

25.2 arcsec

Distance, Radial Speed, Proper Motion

3 Leonis is distant 518.28 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

158.98 pc
518.28 ly
22 km/s
-0.027 arcsec/y
-0.03 "/y

Alternative Designations


Visibility from Your Location

Today's 3 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.9°
Max altitude: 46.6°
Azimuth: 278.1°